Category Archives: Electric Motor

8 Preventable Causes of AC Compressor Failure

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There are any numbers of issues that can cause your air conditioner to stop working. Luckily, they’re not all expensive fixes. The problem could be just a loose wire that’s caused a power failure in your air conditioner. Or you could have a clogged air filter that’s impeding the air flow to the system.

 

On the other hand, when AC compressor failure causes your system to breakdown, you have a major AC emergency service problem and a big expense on your hands. The compressor is a vital and expensive component, and when it goes you may find yourself dropping a lot of cash on a new AC unit.

 

The good news is, as much as 80 percent of the causes of AC compressor failure are preventable if the problems leading to the failure are corrected in a timely manner. These problems can be detected and eliminated during regular AC preventative maintenance.

 

What Is The Compressor?

Your air conditioner’s compressor is often called the heart of the system. This is a good analogy for a few reasons:

 

  • It’s one of the key components without which the system can’t function.
  • It’s usually very reliable, and if it’s failed before its expected life span (10 to 15 years), it’s probably due to an underlying cause that’s often preventable.
  • It does fail, it’s expensive and sometimes impossible to fix it.
  • Like your heart pumps blood through your body, the compressor’s job is to compress the refrigerant gas (hence the name) and pump it through the system so that it can remove heat and humidity from the air.

 

Now that you understand why it’s so critical to keep your compressor in good shape, let’s take a look at some of the things that can cause AC compressor failure and what you can do to avoid them.

 

Problems That Cause AC Compressor Failure

When AC compressor failure happens, it’s often due to an underlying issue that causes stress on the system. That’s important to know for two reasons:

 

  • By detecting and fixing the underlying cause, you’ll prevent AC compressor failure
  • If you replace a failed compressor without fixing the underlying cause, the new compressor is likely to fail as well.

 

These are the common issues that cause AC compressor failure:

 

  1. Dirty Coils.

When dust, grime and mineral scales build up on the condenser coil, the air conditioner can’t expel enough heat from the system and it’s forced to run constantly trying to cool your space. The increased pressure and temperature can cause the compressor to overheat and fail.

 

  1. Blocked Suction Lines.

When your air conditioner’s refrigerant lines become blocked or damaged, the first thing you’ll notice is that the unit is not cooling as effectively. If the problem is not fixed, once again the increased pressure and temperature cause overheating and AC compressor failure.

 

  1. Low Refrigerant Charge.

If your system’s refrigerant lines develop holes or cracks, the air conditioner leaks refrigerant. After a while, the level becomes so low that the compressor has to work harder to pump enough refrigerant through the system to cool your space. The strain can eventually cause the compressor to break down.

 

  1. Incorrect Suction Line Size.

If your refrigerant line develops leaks and needs to be replaced, make sure you get an experienced AC technician to do the job. A line that’s too large or too small for your system can cause premature AC compressor failure.

 

  1. Too Much Refrigerant.

If a less-than-qualified person works on your air conditioner and inadvertently adds too much refrigerant, or even the wrong type of refrigerant, it can be a deadly mistake for the compressor.

 

  1. Electrical Problems.

An electrical failure can result in a buildup of acids that cause a great deal of damage to other parts in addition to the compressor. If you have a failed compressor, make sure the technician tests for the presence of these acids. If he finds them, an electrical burnout has caused damage throughout the system that is probably not worth fixing.

 

But electrical problems are often easily preventable when an experienced tech inspects your system: he can spot and repair damaged wiring, fuses and contractors before they take down your system and cause AC compressor failure.

 

  1. Contaminants in The System.

The high heat and pressure in an air conditioning system, not to mention the locations where they are typically housed in New York City (outdoors, on rooftops, in crawl spaces) can introduce any number of contaminants that can cause damage. These include air, moisture, dirt, debris, leaves, soot, acids, and even bird and pest droppings.

 

  1. Inadequate Oil Lubricant.

To take the heart comparison a step further, think of your air conditioner’s oil lubricant like the blood in your body. If there’s not enough, the system can’t work properly and all kinds of problems can result, including AC compressor failure. When your system is regularly maintained by a trained AC professional, he will check the lubricant levels and the condition of the oil pump to prevent this problem.

 

Take good care of your compressor with regular AC preventative maintenance

When you take good care of your compressor, it will take good care of the air in your space with consistent, reliable cooling. That means having your air conditioning system serviced at least twice a year by a reputable AC service company.

 

About this service, I recommend an industry recognized leading AC Compressor developer and manufacturer to you – Rebeck Enterprise Co., Ltd.

 

The objective of Rebeck is to develop and manufacture AC compressors in consistent high quality to meet and even exceed customer’s requirements. To deliver quick response to customers’ requests and comments; the marketing and after-sales teams always provide free flow communication with customers. Rebeck welcomes all your standard and customized requests about the AC compressor.

 

To get more detail of AC compressors, please do not hesitate to contact with Rebeck right now!

 

Article Source: https://aristair.com/blog/8-preventable-causes-of-ac-compressor-failure/

How To Choose A Motorized Valve?

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Choose Valve Body:

Step 1: Determine The Working Pressure Of The Ball Valve

When the valve is closed, you must be sure that it is in the range of pressure.

 

Step 2: Determine The Temperature Range Of The Ball Valve

Valves are generally used to handle hot fluid or cold fluid. It is very important to determine how low or high temperature is the medium of the valve. There are different materials; such as ceramic, stainless steel, and PVC are used in the manufacture of valves. Each of them is applied to a certain temperature range.

 

Step 3：Determine What Kind of Fluid Through The Valve

Specific applications and fluid control systems are designed to handle different types of fluids. Some valves are used to deal with dams and reservoirs of hydroelectric power plants. There is also used for the normal flow of chemicals. There are a number of special designs, used for radioactive material, to ensure that the valve will not leak radiation.

 

It is also important to make sure whether the fluid is corrosive. These are helpful for choosing the body material. This step is also used to ensure the safety of the valve staff.

 

Step 4: Determine The Volume Of The Fluid

Different flow valve is designed for different purposes, is too thin or too thick are not suitable, so correct size of the valve is very important to choose the size of the valve.

 

Choose Actuator:

  • Torque Protection

To prevent motorized valve actuator in the middle of over torque, this function not only protects the valve, but also protects the actuator itself. The torque is set by the setting device.

 

  • Motorized Valve Position Limit Protection

Motorized valve actuator runs to close and open the limit position automatically stop (with a set of working modes).

 

  • Automatic Phase Adjustment

Electric actuator automatic detection of three-phase power supply terminal of the access, by the appropriate logic operation, the decision of the implementation of the operation of the mechanism when the AC contactor, in order to ensure the electrical connection to the right. If there is no automatic phase adjustment function may be due to damage to the valve and connection order error, Because of the automatic phase adjustment function, the actuator power supply wiring cannot consider the sequence.

 

  • Instantaneous Reversal Protection

When the motorized valve actuator receives commands for the opposite direction, it automatically adds a time delay, to prevent unnecessary wear of the valve shaft and gear box.

 

  • Power Shortage Phase Protection

Motorized valve actuator has a perfect power supply shortage protection function. It uses a combination of monitoring voltage and current method, It can’t only detect the phase of power supply when the motor is at rest, also can detect the power shortage in the operation of the motor. So that prohibits motor operation, to avoid the lack of phase operation caused by motor overheating Notice: The vast majority of the motor phase is in the motor running process.

 

  • Valve Stuck When The Protection

Whatever the motorized valve actuator to open or close the direction of action, the torque protection function is temporarily disabled within 5~10 seconds after the signal is sent to the motor. (If actuator doesn’t act in the time of the 5~10 seconds, Control circuit is cut off the power supply of the motor.) This feature can be achieved when the valve stuck solution card.

 

If you have any interest in motorized valve actuator, please do not miss Sun Yeh Electrical Ind. Co., Ltd. – the company specializes in kinds of electric actuators. Now, come and visit Sun Yeh for more details!

 

Article Source: https://support.bacoeng.com/hc/en-us/articles/115015985047-How-To-Choose-A-Motorized-Valve

How to Decide Between Electric, Pneumatic and Hydraulic Actuators

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Fluid power is a well-established technology; but in case you haven’t noticed, electric actuators have come a long way in the past ten years. But does that mean that fluid power systems are obsolete?

 

To answer that question, I spoke to experts from automation suppliers Festo and SMAC. Festo carries both electric and pneumatic technology, while SMAC specializes in a variety of types of electric actuators from ball screw-driven devices to linear motors.

 

According to Jim Ackert, applications specialist at Festo, fluid power systems may not be going anywhere. In many applications where they were once ubiquitous, however, electrics are pushing in.

 

“For the time being, I think all three technologies have their place in industry,” said Ackert. “But, the flexibility of electric drives, coupled with the fact that the price of electric components has been steadily coming down over the years, makes them more popular and affordable than they once were.”

 

Tradeoffs Between Electric, Pneumatic and Hydraulic Actuators

 

It may sound frivolous, but choosing the right actuator motor technology is a lot like choosing a role-playing game character: the Fighter, Mage and Thief are classic character archetypes in video games, with trade-offs in damage, health and speed. When it comes to actuators, the trade-offs are force, positioning accuracy and speed.

 

In general, the overlap between the force and speed capabilities of fluid and electric actuators is growing. Electric actuators are even making their way into heavy equipment presses and other traditionally hydraulic-dominated markets.

 

Flexibility

Some applications require more flexible equipment than others. Similarly, the different types of actuators vary in flexibility. Because of this, considering flexibility is often a good place to start when deciding on an actuator.

 

For this consideration, you need to look at your application. Will your setup need changes in the future? How many positions will your actuator need to reach?

 

For example, if you are picking objects from one conveyor and placing them onto one of two conveyors, you need three positions. With pneumatic cylinders, this would require at least two cylinders, either set against one another or set up separately, one for each conveyor. With electrics, a position can be set at any point along the device, and you can easily program multiple points.

 

Taken as a whole, electrics are also the most flexible when it comes to force. Take this Curtiss-Wright ballscrew-based actuator, which pushes up to 40 short tons. At the other end of the spectrum, linear motors breeze by at up to 10 m/s (in the case of Festo’s toothed belt actuators). This broad range of specifications means that whatever your needs are, there is an electric device out there that fits them.

 

If your application is high-mix, in the sense that your setup will need to handle extremely high forces as well as lower forces, it can make sense to choose a hydraulic system, ensuring that your actuators will be able to handle any force you throw at it.

 

In terms of flexibility, the primary benefit to pneumatics is that they are simple to install and operate. If you need to change from a 6” stroke to a 12” stroke, it will be relatively simple to swap the cylinder. However, this wouldn’t be preferable in a real-world situation—and if more complex changes are needed, the time and cost will start to add up.

 

Cost

The biggest disparity between what you see at trade shows and what’s really in use on shop floors across the country is the practicality of cost. Sure, that collaborative robot tending a 3D metal printer while streaming data to an iPad is cool, but is it practical?

 

For manufacturing engineers, the name of the game is to get the job done efficiently and on budget. That’s part of the reason pneumatic actuators probably aren’t going anywhere, despite being made technically obsolete by advances in electric technology—and electric motors and drives are getting cheaper every year. Still, comparing Bimba’s original line of pneumatic and electric linear thrusters shows that the electric version costs approximately five times more.

 

Hydraulic systems are the most expensive, and require the most maintenance and equipment to operate.

 

Types of Electric Linear Actuators

Mechanisms of electric linear motion range from ball screws to rack and pinion gears, to linear motors. Each has different strengths and weaknesses.

 

  • Screw Driven Actuators

According to Helix Linear Technologies, there are two main types of screw-driven actuators: ball screw and lead screw. Ball screw-driven actuators convert the rotary motion of a stepper or rotary motor to linear motion by means of a ball screw and ball nut arrangement.

 

In essence, this mechanism takes the principle of a nut riding on a threaded rod and adds ball bearings to decrease friction. However, these mechanisms are not self-locking, and depending on the application may need additional braking mechanisms, such as vertical installations. Ball screws also require regular lubrication.

 

Where a ball screw uses bearings to decrease friction, the lead screw uses a low-friction polymer or bronze nut. The lead screw is therefore much less expensive than other types of linear actuator, but the friction is higher. This means you may need higher motor torque to drive the same load on a less-efficient lead screw mechanism than for a comparable ball screw actuator. The added friction also increases wear and operating temperature, and lead screws need to be replaced more frequently than other types of actuators.

 

Screw drive actuators can deliver extremely high forces, because the force is distributed along the entire helical path of the nut around the screw. They can also be highly accurate. However, drawbacks to this system include faster wear than non-contact systems. According to Ed Neff, President of SMAC, you can reasonably expect a ball screw to wear out in the same time frame as a pneumatic cylinder in certain applications.

 

  • Belt and Gear-Driven Actuators

Belt-driven actuators are like conveyor belts. According to Misumi, belts are typically made of fiber-reinforced elastomer, and usually have teeth for interfacing with the pulleys to eliminate slippage. A carriage rides on top of the belt to carry the payload.

 

The interesting thing about belt systems is that they scale in travel distance more efficiently than screw drive systems. All you need is a longer belt, rather than a longer precision machined helical screw. Another advantage of belt-driven actuators is that they have fewer moving parts, so maintenance is simpler. However, belts will require re-tensioning as part of scheduled maintenance.

 

Belt-driven systems are not ideal for high loads due to the need for thicker belts and their susceptibility to shock loads. Because belt materials are often prone to elongation over time, accuracy eventually suffers.

 

While belt drive systems win out over screws on travel distance, belt tensioning becomes difficult at longer distances. In these situations, according to Danielle Collins of LinearMotionTips.com, rack and pinion systems win out. Rack sections can be laid out to virtually any length.

 

Some rack and pinion systems use a fixed rack and moving pinion, while some use a fixed pinion and moving rack. At longer stroke lengths, moving pinion systems are more efficient because the moving mass is lower. However, cable management is essential in these cases.

 

In gear systems, backlash is always a consideration, but today’s high-precision machining can deliver micron accuracy in gear mating, so the accuracy is comparable to belt driven systems. Some systems also use a split or dial pinion system to remove backlash.

 

In both belt and gear driven systems, the guidance components usually require regular lubrication.

 

  • Linear Motors

Linear motors are typically the most expensive type of electric linear actuator, and they’re also the fastest and most dynamic.

 

Where an electric motor consists of a rotor inside a stator, a linear motor is a motor unrolled. Because linear motors have lower friction than other devices, some linear motor products can last well over a hundred million cycles, according to Neff of SMAC.

 

When the payload mounting surface is precision-machined steel or granite, the device is called a stage. Across the industry, the term “stage” refers to a higher-accuracy device.

 

Simple Hydraulics vs. Servo Hydraulics

 

According to MachineDesign.com, while intermediate-stroke positioning is possible with simple hydraulics, it requires manual control by an operator. The same goes for speed and force control. For computer-controlled or automated position, speed and force control, servo drives are required.

 

With hydraulic systems, the total footprint of the system is much larger than comparable electric systems. Hydraulic systems require hoses, fittings and valves, as well as a hydraulic power unit (HPU) which has a large footprint. While hydraulic cylinders save space at the cylinder, they more than make up for it with the bloated footprint of their control systems. Servo hydraulics requires even more space, with a control cabinet or PLC.

 

How to Choose the Right Actuator for Your Application

Now that we’ve gone over the basics of the different types of actuators, choosing an actuator all comes down to your specific application. Consider the following questions:

 

Force/Payload

  • High Force – Thousands of Pounds

For extremely high forces, such as a press application or a gantry system for heavy equipment, it comes down to hydraulic or electric. The next question to consider is the cycle rate, to determine which option would wear faster and require more maintenance over the life of your system. Ask your vendor about the maintenance and wear of each product.

 

The next factor to consider is that hydraulic oil is messy. If a spill occurs, cleaning up large volumes of oil can be costly and time consuming. Even if a leak does not occur, oil may creep and slowly film surfaces of your machine. In clean environments such as electronics or food processing, the possibility of oil leakage may eliminate the hydraulic option.

 

  • Medium Force – Tens to Hundreds of Pounds

When your required force is within the range for all three options, consider your positioning needs.

 

Will the motion require more than 2 stop positions? If so, a pneumatic system will be complicated to implement, and require manual adjustment. However, pneumatics may still be the least expensive option. The next question to ask is the level of accuracy required. In assembly tasks, for example, you may require fine-grained accuracy, in the tenth-millimeter range. If so, electric actuators may be the best option. Pneumatic systems are typically accurate to a few millimeters.

 

The last thing to consider is the cycle rate of your application. While linear motors are more expensive than other types of actuators, over many cycles (100 Million+) they keep going strong, while other systems will need replacement.

 

  • Low Force

Consider the accuracy and dynamic motion requirements of your application. As Ed Neff of SMAC says, “dumb” motions, such as a simple push, may require no more than a simple pneumatic cylinder. However, any time you want more control over the position or speed of the device, you should consider electrics.

 

Which Actuator is Best?

When making a decision between electric and fluid-power actuators, the key considerations are positioning accuracy, speed and payload.

 

Fluid power systems excel in traditional applications where the main advantages of electric systems are overkill, making their higher cost unjustified. However, electrics are still developing, with the technology advancing every year. Costs are coming down for even the most advanced electromechanical actuators, and some experts believe that one day fluid power systems will be completely obsolete in the linear motion industry.

 

However, today it’s common to see a mix of technologies, even on one machine. A large press, for example, could use a large hydraulic cylinder, with electric actuators for loading/unloading and pneumatic actuators for gripping parts.

 

If you have any interest in learning more information about actuator motor, please try to check out the site of Hsiang Neng DC Micro Motor Manufacturing Corp. – the company specializes in kinds of DC motors, micro motors, gear motors, etc.

 

Article Source: engineering.com

How to Specify and Apply Precision Gearboxes with Servo Systems

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A servo system and gearbox can provide precise motion control, but care must be taken in design, selection, and implementation.

 

With the many industrial gearboxes available today, it’s important to match the proper type of gearbox with the drive, motor, and load. When a machine needs a servo system (drive and motor), the gearbox type is critical for accurate and repeatable motion. Planetary gearboxes fit the bill for servo applications.

 

High-precision helical planetary gearboxes are an excellent choice for applications that need accuracy and reliability. Planetary gearboxes have very low backlash ratings (typically ranging from one to nine arc-min), and when sized correctly offer a service life of over 20,000 hours with virtually no maintenance. Helical planetary gears also provide very quiet and more efficient operation as compared to competitive products.

 

Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They offer power densities that translates to small package size and efficiencies of 90% and greater.

 

Why Use A Gearbox?

Servo motors often drive loads directly without the need for a gearbox, but in many applications it’s advantageous to use a gearbox between the motor and load.

 

One main reason to use a gearbox is torque multiplication. It lets designers use smaller servo systems that consume less energy. Instead of buying relatively large servo drives and motors, designer can use smaller components, saving space and money.

 

Output torque increases in direct proportion to the gear ratio, and top speed of the output shaft decreases. If an application can withstand the reduced speed, a relatively small servo system can supply high torque.

 

Gearboxes can also address inertia mismatches. For high performance servo systems — those with high dynamic responses or low overshoot, for example – the ratio between the reflected load inertia and motor inertia should be as low as practical, ideally under ten-to-one. A precision gearbox reduces the reflected inertia by the square of the reduction ratio. For instance, using a 25:1 gearbox reduces the load’s reflected inertia by a factor of 625, a significant improvement.

 

In some cases, gearboxes simply resolve issues relating to mechanical fit. For example, if directly mounting the motor interferes with another mechanical component, a right-angle gearbox may solve the problem.

 

Compared to most other gear reducers, a precision gearbox provides better accuracy and repeatability. Furthermore, the gearbox’s high efficiency lets it deliver maximum power available from the servo system—features often a necessity in servo applications.

 

Comparing Types of Gearboxes

 

Gearboxes use a variety of power-transmission methods including, but not limited to, planetary gears, worm gears, spur gears, helical gears, and shaft-mount gear units. In servo applications, planetary gearboxes are often the most suitable.

 

Worm gears use a worm or screw gear to turn a larger transverse gear. They can provide high gear reductions in small packages but aren’t that efficient, on the order of 70%. Worm gears aren’t reversible either and thus can’t be back driven, so they cannot be used to increase speed.

 

Spur gears use straight-cut teeth on parallel shafts for power transmission. They are available in a wide range of ratios and are cost effective, but they can be noisy and prone to wear.

 

Helical inline gearboxes also use gears on parallel shafts, but the teeth are cut in helical shapes to allow gradually increasing contact between mating teeth.

 

Helical inline gearboxes and spur gears typically have more backlash than planetary gearboxes, and there is undesirable thrust acting along the gear’s axis. Helically cut gear teeth are quieter and are used in other types of gearboxes because of this.

 

Shaft-mounted gear units are popular for parallel shaft gears, such as spur and helical gears. They are well suited to conveyors and other material-handling applications, and are easy to mount. However, they suffer from the same disadvantages as their constituent parts.

 

Planetary gearboxes are named for their resemblance to a simple solar system. They consist of a ring gear, several planet gears, and a sun gear. The ring gear is typically fixed and is often part of the gearbox’s outer casing, and the input shaft drives the sun gear.

 

Rotation of the sun gear drives the planet gears to spin about their own axes and revolve about the sun gear. A carrier attached to the planet-gear shafts harnesses output. This arrangement creates a balanced and compact design that is concentric about the shaft. If multiple stages are needed, it is relatively simple to connect the output of one set of planet gears to the sun gear of a secondary stage.

 

High efficiency, low backlash, and high power density make planetary gearboxes the best of these alternatives in high-precision servo system applications.

 

Selecting Gearboxes and Servo Systems

 

A servo system coupled with a planetary gearbox is expected to provide precise motion, but this requires all components be carefully matched. Although it’s possible to buy the servo drive, motor, and gearbox from different suppliers, it’s not recommended as this requires a great deal of research and comparison to ensure all components will work together. Purchasing components from a single supplier — especially one that has carefully matched the components and will stand behind the specific combination of parts in question—offers several advantages.

 

The supplier has done all the research and confirms compatibility. Most suppliers will extend a more favorable warranty on such purchases. Plus, they can provide the approved mounting hardware to connect the components.

 

Some suppliers provide online tools for selecting servo systems and compatible gearboxes, easing the specification effort. These selection guides aid the design and provide specific recommendations for closely matched components that can be purchased as a system. In these cases, engineers can be certain the systems they specify are compatible in all critical areas, and that the components will come with the required mounting bushings and keys.

 

In fact, some selector tools let designers enter their torque and speed requirements, and then automatically filter a list of available motor-and-gearbox sets. Engineers can enter torque data in metric or imperial values, or the designer can select a particular servomotor size. Designers enter speed data as discrete values, or pick a gear ratio. Finally, the engineer can choose a preferred physical orientation—inline, right-angle gearing, or both.

 

The resulting list of available systems includes pricing information, a factor often critical to the selection process. After choosing a motor/gear combination, the designer moves to a page with full specifications for the selected servo system, the gearbox, and the combination.

 

One caveat: Even though a selector can make the specifying process easier, engineers and designers should always verify that a system meets their needs and gets applied correctly.

 

Best Practices and Common Pitfalls

 

Although gearboxes help reduce mismatches between the motor’s inertia and that of the load, the gearbox’s inertia must be included in the calculation:
Best Practices and Common Pitfalls
When high dynamic responses are required, engineers need to carefully tune the servo systems, preferably with loads attached, for the most responsive performance. Tuning can provide faster moves and minimize spongy motion while reducing overshoot or ringing after moves is complete.

 

Designers must also pay attention to radial-load and axial-thrust-load specifications. Axial-thrust load is the force acting along the output-shaft axis; radial load acts perpendicularly to the output shaft.

 

The force of gravity acting on the load is perhaps the most common source of radial loads, but other sources are possible, depending on the mechanical apparatus attached to the output shaft. Additional external bearings may be required with some loads to minimize these forces and prolong the life of the gearbox’s internal bearings.

 

A common way to minimize backlash is to approach all target positions from a common direction. In the event a reversing move is required, some designers let the load go past the desired position and return to it from the common direction.

 

Gearbox Applications

 

One classic example of a precision gearbox application is an indexing table with several stations for machining or assembly. Precision gearboxes and servo systems fit well when the table is relatively heavy and needs to be accurately positioned and when high-speed operation is not as important.

 

In this case, the gearbox is being used simply for accurate torque multiplication. The servomotor’s top speed of 3,000 to 5,000 rpm is not required at the load, so the gear reduction ratio and corresponding torque multiplication can be large. This allows a relatively small servo system to handle the task. The servo system might even use its built-in indexer to control the motion based on discrete I/O signals from a PLC, or even a simple selector switch, depending on the required level of automation.

 

Another example of a gearbox application is a high-speed pick-and-place device, such as part removal from an injection-molding machine. The cycle time of these machines is often critical to meet production quotas, and the designer typically wishes to remove parts as quickly as possible after the mold opens.

 

The moving arms of the pick-and-place device are designed to be as lightweight as possible, but inertia mismatch can still be a factor. The gearbox can minimize the mismatch so that the pick-and-place mechanism is extremely responsive.

 

The PLC in this example might be much more involved in controlling the motion, commanding moves with pulse and direction signals. In some cases, the PLC also passes recipe tuning values to the servo drive when the motion profile or the picked-part’s inertia changes.

 

Precision gearboxes and servo systems can be used to meet a wide range of automation challenges. Machine builders should purchase the required components from a knowledgeable vendor who will stand behind their products. Using online selection tools can simplify the choices, although the system will require tuning after installation. When properly designed, specified, and tuned, these systems provide accurate, repeatable results for many years.

 

If you need more information about planetary gearboxes, please do not miss the website of JIA CHENG Precision Machinery Co., Ltd.

 

The company can provide high quality and precision reducer, gearbox, and coupling for you. Feel free to send inquiry to let JIA CHENG know your requirements.

 

Article Source: MachineDesign

Understand More Information About Gearedmotors

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Adding a gear-train to the output of any motor will reduce the speed, while simultaneously increasing torque. Gearing can be added to any type of motor. There is no need to waste time designing a geartrain and sourcing all the parts. Chances are, there is a gearmotor solution that you can drop right into your design.

 

Gear train construction ranges from simple plastic drive-trains for toys to beefy metal gear-trains for extra-high-torque applications. Gear trains can be mated to brushed or brushless DC motors as well as steppers. Gear-train modules in a variety of gear ratios are available to fit standard NEMA sized steppers.

 

Applications:

  • Robot Drive Trains
  • Radio Control Vehicles
  • Cordless Tools

 

Advantages:

  • Speed Reduction – Many DC motors simply run too fast to be useful in direct-drive applications.
  • Increased Torque – A lot of work can be coaxed from a relatively small motor if fitted with a suitable gear train.

 

Limitations:

The potential downsides of adding a gear train to a motor include:

 

  • Friction – This is especially a problem with low-cost plastic gear trains used with low-voltage motors. The extra resistance can make these gear-trains balky at low speeds.
  • Inertia – This is more of a problem with metal gear-trains. All that additional rotating mass can inhibit rapid acceleration.
  • Backlash – Any sloppiness in the gear-train tolerances create slack that must be taken up whenever the direction reverses. This can be a problem in precision motion control applications.

 

High-end precision gear-trains can be optimized to minimize any or all of these disadvantages. But be prepared to pay a premium price for them!

 

Hsiang Neng’s geared DC motor is widely used by various applications, such as magnetic bike, vending machine, game player, instrument and appliance, massage tools, stage spinning light, auto shutter, auto mah-jongg table, medical equipment. The DC gear motor is designed and manufactured in high precision and superior quality. If you are interested in learning more information about gearmotors, welcome to contact with Hsiang Neng.

 

 

Article Source: https://learn.adafruit.com/adafruit-motor-selection-guide/geared-motors

DC Electrical Motors for Cars

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Electric cars are rechargeable vehicles powered by electric motors. Electric motors for cars convert electrical energy into mechanical energy. Controllers regulate and control power received from rechargeable batteries to run the motors. The motors could be AC or DC motors. DC motors for electric cars could be further classified as permanent magnet, brushless, and shunt, series and separately excited. The DC uses electricity and a magnetic field to produce torque, which rotates the motor. The simplest DC electrical motor comprises of two magnets of opposite polarity and an electric coil forming an electromagnet. The properties of attraction and repulsion are used by the DC electrical motor to convert electricity into motion — opposing electromagnetic forces of magnets generate torque causing the DC motor to turn. Characteristics desirable of electric motors for cars include peak power, ruggedness, high torque-to-inertia, high peak torque, high speed, low noise, minimal maintenance and ease of use. Current generation electric motors are combined with inverters and controllers for a wide range of torque.

 

The abundance of series DC motor has allowed it to be tested on a variety of vehicles. The Series DC are robust and long-lasting, and the power density provides the best value for money. The torque curve suits a variety of traction applications. However, it is not as efficient as the AC Induction motor. The commutator brushes wear out and maintenance activities are required periodically. It is also not suitable for regenerative braking, that allow vehicles capture kinetic energy to recharge batteries.

 

DC motors are simpler and cost less, and have been widely used in demonstration electric vehicles. Brushless DC has no commutators, and is more powerful and efficient than commutator motors. Such DC motors, however, require more sophisticated controllers. Brushless DC in electric cars can give efficiencies up to 90%, and no servicing is required for up to hundred thousand kilometers. Experts at Floyd Associates (2012) argue that electric cars with DC Brushless motors can achieve the highest speed but slowest acceleration; AC Induction can achieve the fastest acceleration with average top speed; Permanent Magnet motors can achieve top speed and average acceleration; and Switched Reluctance motors provide the most cost-effective solution.

 

Hsiang Neng is the professional manufacturer of DC electrical motors. Our DC electrical motor is designed and manufactured in high precision and superior quality. If you need further details about DC motors, welcome to check out Hsiang Neng’s website and feel free to contact with us.

 

 

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A DC Gear Motor Enhances Your Actuator’s Performance

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When you purchase a linear actuator, you take no chances with its quality. The same should ideally apply to the DC gear motor that is used in conjunction with linear actuators. As is the case with actuators, there is also ample choice when it comes to DC gearmotors. Before you choose the final product, it is important to discuss your requirements with your chosen manufacturer. Ultimately, this will ensure that there are no hindrances in your desired applications.

 

The defining characters of a motor gearbox are its versatility and customization. There are several combinations in this such as DC voltage, sensor options and gear ratio.

 

Then again, there are gearbox options that are typically used to power most fifth wheel landing gear systems. You could choose to procure them with or without a switch and wire harness. For RV slide-out applications, there are specially designed gearboxes and they are a heavy-duty right angle drive gearbox. They are also referred to as center-drive systems. For medium duty applications, manufacturers offer worm drive and spur gear driven gearbox. To eliminate back-drive potential of actuators, you could employ gearboxes with electric brakes.

 

Alternatively, you could also opt for a DC gear motor that can be produced with a variety of output shaft combinations and manual crank capabilities. If you need exceedingly high levels of strength and reliability, you could also make use of an advanced gearbox that features a heavy-duty combination worm drive and spur gear drive. In addition to all these varieties, there are several manufacturers that will also offer you customized designs to meet your exacting specifications. Customization is chosen by several OEMs and contract manufacturers. By sending drawings and other specifications to the manufacturer, you can easily get a prototype and then finalize the actual product.

 

When you decide to use a DC gearmotor in conjunction with your linear actuator, it is important to see if the housing, components and lubrication is up to the mark. This helps maximize the performance potential of the gearbox. The housing is often made with materials such as cast aluminum and bronze. The other important point to check is the energy efficiency and maintenance issues. A gearbox that is energy-efficient but requires repetitive maintenance is certainly not a good choice.

 

Finally, a lot depends on the experience and manufacturing capabilities of the firm you are placing an order with. It is prudent to check their background and track record over the internet before you make a final purchase decision for your DC Gear Motor.

Hsiang Neng’s DC gear motor is widely used by several of applications, such as magnetic bike, vending machine, game player, instrument and appliance, massage tools, stage spinning light, auto shutter, auto mah-jongg table, medical equipment. The DC gear motor is designed and manufactured in high precision and superior quality. All DC gearmotors are inspected by precise instrument and tools before dispatch. The production processes are conducted in accordance to ISO 9001:2008 standard to minimize defective rate and ensure the highest performance the DC gear motors used in your applications. Welcome to visit our website to learn more information and feel free to contact with Hsiang Neng.

 

 

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DC Micro Motors for Surgical Optical Magnification

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Medical application solutions have been incorporating miniaturization in order to provide more tools for surgical and medical use that can perform high precision operations with an extremely small margin of error. Miniaturized tools and DC micro motors have been developed for another surgical aspect – that of a surgeon’s vision.

 

It is a common sight to see a surgeon wearing a pair of magnifying glasses when performing a procedure. However, these spectacles are really inadequate in an era where medical procedures are becoming increasingly precise and quickly shrinking in scale. Fixed magnifying glasses limit the field of vision and a very small range where the lens are in focus.

 

This problem has set the framework for a medical application solution that incorporates auto-focus features with a full range of motion.

 

Head Mounted Vision System

 

A solution for enhanced vision for a surgeon has a hefty lift of specifications. The vision system must be hands free and light weight in order to be comfortably worn over long periods of time. In order to perform better than fixed lens, a wide range of magnification factors and an automatic focus are needed in order to compensate as a surgeon moves his head and operates in a different location. For extended functionality, the vision system needs to incorporate integrated lighting to handle shadows and an optional output to video camera provides a precise record everything a surgeon sees.

 

Clearly, these specifications are rather vigorous when coupled with the need to have all of this equipment fit comfortably in a doctor’s field of vision.

 

How DC Micro Motors Provide the Technical Solution

 

The system specified above will have a number of moving parts that have to respond quickly and accurately to a surgeon’s vision. Precision movements are achieved with a system of DC micro motors and DC gear-motors. Each lens requires two DC micro motors in order to properly set the order of magnification and focus distance. In order to achieve a high level of precision for a 10 micrometer resolution, the DC micro motors are equipped with a high quality set of magnets and coils supplemented with specialty lubricants to lower initial torque requirements.

 

The lubrication and fine surfaces are responsible for minimizing friction for higher resolution operation without jolts or backlash. Within the casing, the coils and magnets can reach temperatures over 100 degrees Celsius in order to operate continuously for several days without any limitation on service life or effectiveness thanks to the minimal amount of friction.

 

DC micro motors and other miniaturized components continue to lead the way in paving new innovations for medical application solutions. The ultimate goal of any miniaturized system is to obtain a maximum precision in the minimum space. This head mounted vision system is ideal for demanding positioning tasks, ranging from optical filters and focusing units to distribution of medical samples, inner-tube valves, and other micro positioning systems. Surgical tools continue to evolve in step with the medical field to the benefit of patients everywhere.

 

Hsiang Neng DC Micro Motor Manufacturing Corporation was established in 1985, which is a professional manufacturer of precise DC motors and geared motors. So far, we are mainly in the line of geared motors, planetary geared motors, mini motors, large-sized motors as well as motors for treadmills, actuators and so on products. If you need more details about DC Micro Motor or other DC motors, welcome to visit our website and feel free to contact Hsiang Neng!

 

Hsiang Neng Dc Micro Motor Manufacturing Corporation

Address: No. 24-2, Wann Nian Lane, Yuan Lin Town, Changhua Hsien Taiwan

Tel: 886-4-8359296

Fax: 886-4-8350639

E-mail:

Sales: sales@hsiangneng.com

Procurement: procurement@hsiangneng.com ,info@hsiangneng.com

 

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Why Install A Wall Fan?

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The fan is more than just an appliance that you use to circulate air. In fact, this cooling device can improve ventilation and it can also help keep the room warm during winter months and cooler during the summer months. Ceiling fans and wall fans help you maximize the effect if your thermostat. What is a ceiling fan? This is the type of cooling device that is installed on the ceiling. What about the wall fan? Unlike the ceiling fan, this cooling device is mounted on the wall. This is the perfect alternative if the room does not permit the installation of a cooling fan on the ceiling

 

But why install a wall fan? Here are some of the reasons

 

If space is in question then the wall fan is the perfect answer. Stand fans take up space because you need to place it in one area. Once it occupies that particular area, you can no longer utilize it. On the other hand, a wall mounted fan is installed on the wall thus leaving the rest of the room free from any obstruction and giving you more space to utilize.

 

These fans are much easier to install than ceiling fans because you only have to deal with a few pieces and you can install it in mere minutes. With a brief rundown on the user’s manual, you can easily put this fan up on the wall with little or no help at all.

 

If cool air is the problem, then this wall fan is the perfect solution. Whether you install the one that oscillates or the type that is more directional, rest assured that with these fans you will always get the cool air that you have always wanted.

 

King Fortune Wall Fan Company is one of the Taiwan’s premier manufacturers of high quality wall fans. Our main product includes 16″ wall fan, 16″ 40cm wall fans, 18″ industrial wall fan, 18″ 45cm industrial wall fan and more. Our wall fans are exported worldwide and have developed an enviable reputation for quality and reliability. To achieve the highest customer satisfaction, all products are tested during manufacture to ensure the customer receives superior wall fan as they expect. The wall fan, designed with neatness and compactness, is ideal for warehouses, restaurants, plants, cooling offices, homes, barns, garages and any other area where floor space is limited. The versatile fans are easily mounted on the wall or ceiling, delivering powerful and efficient air circulation within the area. More info about wall fans, welcome to contact King Fortune!

 

 

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Best Desk Fan

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The Best Desk Fans

If you are searching for a friend fond of the retro style, you might want to look at one of the models of portable chrome fans available that truly remind us of a different era. These fans are often clean and shiny to look at. They also come with up to three fan speeds and will run you between thirty and fifty dollars.

Unlike larger fans, however, these small, retro fans may not be able to cool off the entire room. But they still offer terrific cooling power because you can angle them how you wish.

If the new college grad has a particularly small desk, you might run into the issue that they have a desk unable to accommodate a desk fan with a wider base. If that is the case, you may want to consider slimmer fan models or those with a clip allowing attachment to a desk blotter or computer. These smaller model fans typically feature plastic blades and are powered via USB so they simply have to be plugged into one’s desk unit or tower.

There is little doubt that the purchase of a desk fan is going to be one that will be appreciated for a long time to come by the recipient.

Are you searching for the perfect gift for a new college graduate? For advice to help you select the best fan, check out this insider’s guide to desk fans and this office design cheat sheet.

There is no question that it is a nice idea to get a new college graduate with a good luck gift for their new adventures in the work place.

One of the best gifts that a college grad can receive is a brand new desk fan. Not only will it keep them cool at their desk in their new job, but it will also remind them of your thoughtfulness and how you remembered their big graduation day.

There are some folks who might think that a fan isn’t an appropriate gift because it is a bit of an impersonal one. Some people turn to old standby gifts, like a plant or flowers.

In reality, however, a fan is the perfect gift for someone starting out in their career. Moreover, the recipient is going to continue to reap the benefits that their fan will give them for years to come.

And these days, there are so many lovely desk fans from which to choose that your gift will also serve as a beautiful piece on their desk. In fact, there are a variety of models available with styles and colors to match all decors. Finally, fan technology has improved in recent years and these units are quieter, smaller, and more beautiful than ever before.

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