SMPS: Basics & Working of Switched Mode Power Supply

Switching mode power supply (SMPS) is used in a range of applications as an efficient and effective source of power. This is in major part to their efficiency. For anybody still working on a desktop, look for the fan output in the central processing units (CPU). That’s where the SMPS is. SMPS offers advantages in terms of size, weight, cost, efficiency and overall performance. These have become an accepted part of electronic gadgets. Basically it is a device in which energy conversion and regulation is provided by power semiconductors that are continuously switching “on” and “off” with high frequency.

 

The different kinds

  • C. to D.C. Converter
  • Forward Converter:
  • Flyback Converter:
  • Self-Oscillating Flyback Converter
  • DC-DC converter

 

The primary power received from AC main is rectified and filtered as high voltage DC. It is then switched at a huge rate of speed and fed to the primary side of the step-down transformer. The step-down transformer is only a fraction of the size of a comparable 50 Hz unit thus relieving the size and weight problems. We have the filtered and rectified output at the secondary side of the transformer. It is now sent to the output of the power supply. A sample of this output is sent back to the switch to control the output voltage.

 

Forward converter

 

In a forward converter the choke carries the current when the transistor is conducting as well as when it’s not. The diode carries the current during the OFF period of the transistor. Therefore, energy flows into the load during both the periods. The choke stores energy during the ON period and also passes some energy into the output load.

 

Flyback converter

 

In a flyback converter, the magnetic field of the inductor stores energy during the ON period of the switch. The energy is emptied into the output voltage circuit when the switch is in the open state. The duty cycle determines the output voltage.

 

Self-Oscillating Flyback Converter

 

This is the most simple and basic converter based on the flyback principle. During the conduction time of the switching transistor, the current through the transformer primary starts ramping up linearly with the slope equal to Vin/Lp. The voltage induced in the secondary winding and the feedback winding make the fast recovery rectifier reverse biased and hold the conducting transistor ON. When the primary current reaches a peak value Ip, where the core begins to saturate, the current tends to rise very sharply. This sharp rise in current cannot be supported by the fixed base drive provided by the feedback winding. As a result, the switching begins to come out of saturation.

 

Basic working concept of a SMPS

 

A switching regulator does the regulation in the SMPS. A series switching element turns the current supply to a smoothing capacitor on and off. The voltage on the capacitor controls the time the series element is turned. The continuous switching of the capacitor maintains the voltage at the required level.

 

Design basics

 

AC power first passes through fuses and a line filter. Then it is rectified by a full-wave bridge rectifier. The rectified voltage is next applied to the power factor correction (PFC) pre-regulator followed by the downstream DC-DC converter(s). Most computers and small appliances use International Electrotechnical Commission (IEC) style input connector. As for output connectors and pinouts, except for some industries, such as PC and compact PCI, in general they are not standardized and are left up to the manufacturer.

 

Why SMPS

 

Like every electronic gadget, switching mode power supplies also involve some active and some passive components. And like every of those gadgets, it has its own advantages and disadvantages.

 

Let’s start with why you should go for a SMPS

 

  • The switching action means the series regulator element is either on or off. Very high efficiency levels are achieved as very little energy us dissipated as heat.
  • As a result of the high efficiency and low levels of heat dissipation, the switch mode power supplies can be compact.
  • Switch mode power supply technology also provide high efficiency voltage conversions in voltage step up or “Boost” applications and step down or “Buck” applications.

 

Then there’s the bad set

 

  • The transient spikes due to the switching action can migrate into other areas of the circuits if not properly filtered. These can cause electromagnetic or RF interference affecting other nearby items of electronic equipment, particularly if they receive radio signals.
  • To ensure that a SMPS performs as per the required specification can be a bit difficult. The ripple and interference levels are particularly tricky.
  • The costs of a switch mode power supply is calculates before designing or using one. Additional filtering further adds to the cost.

 

What would the future hold?

 

In the future, we could have more efficient SMPS aimed at a better converter doing the most effective conversion process. The focus areas for designers in making SMPS efficient would be:

 

  • Higher output power
  • Achieving higher current output and low voltage
  • Increasing power density
  • Using switching device like Schottky diode

 

Hon-Kwang Electric specialized in manufacturing switch mode power supply and related products. We provide series of switching power supplies to meet different demands of you. If you are interested in learning more details about switching mode power supply, please feel free to contact with Hon-Kwang.

 

Article Source: http://electronicsforu.com/resources/learn-electronics/smps-basics-switched-mode-power-supply

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Choosing the Best Option for Overcurrent Circuit Protection

When it comes to overcurrent protection of electronic equipment, fuses have long been the standard solution. They come in a wide variety of ratings and mounting styles to fit virtually any application. When they open, they completely stop the flow of electricity, which may be the desired reaction; the equipment or circuit is rendered inoperable, which draws the user’s attention to what may have caused the overload condition so that corrective action can be taken.

 

Nevertheless, there are circumstances and circuits where auto-recovery from a temporary overload without user intervention is desirable. Positive temperature coefficient (PTC) thermistors – also called polymeric positive temperature coefficient devices (PPTCs) or resettable fuses – are an excellent way of achieving this type of protection.

 

Ceramic PTCs are also widely available through possess different operating characteristics including greater internal resistance, higher ambient heat tolerance, and higher voltage ratings. As they are typically used within high ambient heat areas including heating equipment applications not common to many electronics requirements, they were not factored within the scope of this article.

 

How a PTC works

 

A PTC resettable fuse consists of a piece of polymer material loaded with conductive particles (usually carbon black). At room temperature the polymer is in a semi-crystalline state and the conductive particles touch each other, forming multiple conductive paths and providing low resistance (generally about twice that of a fuse of the same rating).

 

When current passes through the PTC it dissipates power (P = I2R) and its temperature increases. As long as the current is less than its rated Hold Current, IHOLD, the PTC resettable fuse will remain in a low-resistance state and the circuit will operate normally. When the current exceeds the rated Trip Current, ITRIP, the PTC heats up suddenly. The polymer changes to an amorphous state and expands, breaking the connections between the conductive particles. This causes the resistance to increase rapidly by several orders of magnitude and reduces the current to a low (leakage) value just sufficient to keep the PTC in the high-resistance state – generally from around tens of milliamps to several hundred milliamps at rated voltage (Vmax). When the power is shut off the device cools down and returns to its low-resistance state.

 

Like a fuse, a PTC is rated for the maximum short circuit current (IMAX) it can interrupt at rated voltage. IMAX for a typical PTC is 40A, and may reach 100A. Interrupting ratings for fuses of the sizes that may be used in the sorts of applications we are considering here can range from 35 to 10000 amperes at rated voltage.

 

The voltage rating for a PTC is limited. PTC resettable fuses for general use are not rated above 60V operating voltage (there are PTCs for telecom application with 250V and 600V interrupting voltage, but their operating voltage is still 60V); surface-mount and small cartridge fuses are available with ratings from 32V to 250V or more.

 

The operating current rating for PTCs ranges up to about 9A, while the maximum level for fuses of the types considered here can exceed 20A, with some available to 60A.

 

The useful upper temperature limit for a PTC is generally 85°C, while the maximum operating temperature for thin-film surface mount fuses is 90°C, and for small cartridge fuses is 125°C. Both PTCs and fuses require derating for temperatures above 20°C, although PTCs are more sensitive to temperature (Fig.2). When designing in any overcurrent protective device, be sure to consider factors that may affect its operating temperature, including the effect on heat removal of leads/traces, any air flow, and proximity to heat sources. The speed of response for a PTC is similar to that of a time delay fuse.

 

Common PTC applications

 

Much of the design work for personal computers and peripheral devices is strongly influenced by the Microsoft and Intel System Design Guide which states that “Using a fuse that must be replaced each time an overcurrent condition occurs is unacceptable.” And the SCSI (Small Computer Systems Interface) Standard for this large market includes a statement that “… a positive temperature coefficient device must be used instead of a fuse, to limit the maximum amount of current sourced.”

 

PTC resettable fuses are used to provide secondary overcurrent protection for telephone central office equipment and customer premises equipment, alarm systems, set top boxes, voice over IP (VOIP) equipment and subscriber line interface circuits (SLICs). They provide primary protection for battery packs, battery chargers, automotive door locks, USB ports, loudspeakers and power over Ethernet.

 

SCSI Plug and Play applications that benefit from PTCs include both the mother-board and the many peripherals that can be frequently connected to and disconnected from the computer ports. The mouse, keyboard, printer, modem and monitor ports represent opportunities for misconnections and connections of faulty units or damaged cable. The ability to reset after correction of the fault is particularly attractive.

 

A PTC resettable fuse can protect disk drives from the potentially damaging overcurrent resulting from excessive current from a power supply malfunction.

 

PTC resettable fuses can protect power supplies against overloading; individual PTCs can be placed in the output circuits to protect each load where there are multiple loads or circuits.

 

Motor overcurrent can produce excessive heat that may damage the winding insulation and for small motors may even cause a failure of the very small diameter wire windings. The PTC will generally not trip under normal motor start up currents, but will act to prevent a sustained overload from causing damage.

 

Transformers can be damaged by overcurrent caused by circuit faults, and the current limiting function of a PTC can provide protection. The PTC is located on the load side of the transformer.

 

Fuse or PTC?

 

The following procedure will help in selecting and applying the correct component. Help is also available from device suppliers. For unbiased advice it is wise to look for a company that offers both fuse and PTC technology.

 

  1. Define the circuit operating parameters. Consider the following: normal operating; current in ampere; normal operating voltage in volts; maximum interrupt current; ambient temperature/rerating; typical overload current; required opening time at specific overload; transient pulses expected; resettable or one-time; agency approvals; mounting type/form factor; typical resistance (in circuit).

 

  1. Select a prospective circuit protection component.

 

  1. Determine the opening time at fault. Consult the Time-Current (T-C) Curve to determine if the selected part will operate within the constraints of the application.

 

  1. Verify ambient operating parameters. Ensure that the application voltage is less than or equal to the device’s rated voltage and that the operating temperature limits are within those specified by the device

 

  1. Verify the device’s dimensions. Compare the maximum dimensions of the device to the space available in the application.

 

  1. Test the selected product. Independently test and evaluate suitability and performance in the actual application.

 

Zonkas is the professional manufacturer of capacitor, inductor and transformer. Our main products including: various inductors, transformers, Safety Capacitor (Y1, Y2, X1, X2), Ceramic Capacitor, Film Capacitor and Electrolytic Capacitor. If you need more information about PTC resettable fuses or other capacitors, welcome to visit our website or contact with Zonkas directly!

 

 

Article Source: http://www.engineerlive.com/content/21341

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Cassette Sprocket Buying Guide

What is a bicycle cassette?

A bicycle cassette is the cluster of sprockets on your bike. The cassette is normally situated on the rear hub of your bike; slotting onto a freehub body, and held firmly in place with a threaded cassette lockring. Depending on the ‘speed’ of your bike, your cassette could have anything between a 5 and 12 sprocket; most modern bicycle drivetrains utilize either 9, 10 or 11 speed cassettes.

 

Why are cassettes important?

Cassette sprockets provide you with a range of gearing options that your chain can run on. The range of gear ratios allows you to vary your pedaling cadence (revolutions per minute), to achieve optimum efficiency.

 

Running your chain on one of the larger sprockets (more teeth) on the cassette will provide an “easier” gear; letting you turn your legs faster. Running your chain on a sprocket with a lower number of teeth, will allow you to keep pushing power through your drivetrain, without “spinning out” (pedaling at an uncomfortably high number of revolutions) on a downhill section or sprint. A good range of gears on your cassette, therefore allows you to select the optimal gear to use; to keep your pedaling as smooth and as fluid as possible.

 

How do you choose the right cassette sprocket for your bike?

The choice of a cassette sprocket can appear overwhelming at first glance. There are different combinations of sprockets, to suit different tastes and terrains; with a significant difference between the cassettes you would use for a triathlon bike, compared to a mountain bike cassette.

 

The main thing to consider is the spread of gears on the cassette sprocket. The closer the highest and lowest number of teeth is, the smaller the jump between gears; facilitating a smoother gear change. However, having closer geared sprockets will normally decrease the size of the largest sprocket on the cassette; leaving you with a gear ratio that may be less suited to climbing and tough terrain.

 

G-MA Engineering Co., Ltd. provides wide range of bicycle parts for clients. Cassette sprocket, bike seat post, MTB crankset, and so on titanium bike parts all can be found on our website. If you are interested in G-MA’s cassette sprocket or other products, welcome to browse our website or contact with G-MA directly!

 

 

Article Source: http://guides.wiggle.co.uk/cassette-buying-guide

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Optimum Flow Control Contributes Towards Reducing Manufacturing Costs

Oil and gas companies around the globe face the challenge of increasing production and delivering quality products while reducing resources and manufacturing costs. Process control has a financial impact and so reducing process variability is, therefore, a key factor in maximizing quality output and reducing costs. Comprehensive studies of control systems have shown that up to 80% of control loops have not performed satisfactorily in reducing process variability. In most instances, the control valve was found to be the major cause of the problem. Despite this, the impact of the flow control valve on dynamic performance is often overlooked.

 

Optimum flow control is imperative; choke and control valves are subject to a variety of technical phenomena and careful selection of the right control valve for each application is crucial.

 

Superior design features include the valve material, which should be resistant to the chemical composition of the flow medium. For example, discs and internals made of solid Tungsten Carbide, renowned for its erosion and cavitation resistant properties. Industrial diamond facings inserted on the discs have also produced some very good results under severe conditions. The sealing surface must not be in contact with the flowing medium to ensure seat tightness can be guaranteed for a longer period of time. The construction of the internals should ensure that the downstream of the back disc is abrasive resistant. This removes the majority of cavitation and erosive material from the sealing surfaces as well as from the valve body. The design of the internals must be able to absorb turbulence in the flow so that the outgoing flow is more laminar. Rotating choke disc valves are recommended for extremely severe applications.

 

Flow control valves are also optimized by using different shaped and sized throttling orifices in the rotating discs. This affects the Cv value of the valve and has a crucial impact on process control. The right valve size and trim must be chosen to match the process conditions.

 

For both new and existing applications, to ensure downtime is kept to an absolute minimum and additional costs are not incurred, flow control valves should ideally be engineered to fit with no modifications to existing pipework. This also ensures that any replacements can be made efficiently.

 

Ultimately, these design features coupled with repairable internals and easy maintenance maximize production output, lower life-cycle costs and extend the mean time between failures, providing an overall reduction in total cost of ownership.

 

Found in 1984, ASHUN has established a fine reputation worldwide. Our professional R & D team develops new products continuously to meet our customers’ needs. If you need more information about flow control valves or other valves, welcome to browse our website or contact with ASHUN directly!

 

 

Article Source: http://EzineArticles.com/7478601

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What are Sprayer or Pump Output and How are They Measured?

Pumps and sprayers commonly have a unit of measure specification – referred to as “output” , which is commonly measured in mcl, ml, or cc. Output determine how much fluid is dispensed each time the pump or sprayer is actuated.

 

MCL, or microliters, is a liquid unit of measurement that is equivalent to 1/1,000 ml, which is pretty small. It is commonly used to indicate fine mist sprayers and regular mist sprayers output.

 

Say you have a fine mist sprayer that has an output of 180 mcl; this would mean that for each spray action, you will get 180 microliters of liquid each time you actuate the sprayer.

 

Lotion pumps and some trigger sprayers, on the other hand, have a larger output capacity so the output measurement is measured in cc or ml. For most, lotion pumps have an output range of 0.5cc-4cc. Some high output pumps have output range of 4cc – 8cc.

 

When choosing the correct sprayer, it is important to understand your product so that you can properly determine the sprayer output for maximum results.

 

Living Fountain Plastic Ind. Co., Ltd. is a professional manufacturer and exporter of Cosmetic Packaging. Our products including trigger sprayer, lotion pump, cream pump, dispenser pump, pumice pump, fine mist sprayer, etc. If you have any questions about our products, please feel free to ask Living Fountain!

 

Article Source: http://www.oberk.com/packaging-crash-course/quick-question-monday-what-is-sprayer-or-pump-output-and-how-are-they-measured

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Characteristics of Airjet Yarn

Textiles made from AirJet yarns have everything it takes to become your favorite garments. The secret of their long-lasting quality lies in the structure of the yarn. The yarn structure also prevents unattractive pilling and fuzziness that would spoil the appearance. And the fabric’s smooth surface shows off colors to their best advantage. Your textiles will stay as beautiful as they were on Day One – even after frequent use and repeated washings.

 

Lasting Quality

The ongoing comfort and durability of AirJet yarns are multi-faceted. More than simple strength, these yarns are better in almost every way. The unique and improved yarn structure decreases pilling, lint, stray fibers, and deformation while absorbing more moisture and maintaining softness. The below test results show AirJet yarns tested versus typical ring-spun products. You’ll see that AirJet yarns create a more versatile and well-balanced product that will improve any garment type.

 

8 Key Fabric Characteristics for Longevity
8 Key Fabric Characteristics for Longevity

 

Continual Color Brilliance

Color brilliance is a result of a smooth fabric surface. As fabrics deteriorate and pilling (bobbling) occurs, the colors appear faded and the fabric surface ages. Therefore, color brilliance is directly related to fabric quality and longevity. In the below test, we’ve tested a ring-spun yarn versus an airjet yarn for fortitude after multiple washings. You’ll see that AirJet spun yarn shows less deterioration and darker, richer color after 20 washings.

 

Wash-Test and Pilling Behavior
Wash-Test and Pilling Behavior

Maw Chawg Enterprise Co., Ltd. is the world’s No.1 professional yarn supply workshop with world-class for elastic yarns. Our primary products are spandex covered yarns and metallic yarns which have belong to a vital link in the spinning supply chain and takes an important part in global textile industries in the worldwide. Maw Chawg yarns are widely used in the productions of woof and chain, the capacity on all production lines can be easily adjusted to meet customer requests. If you are interested in learning further information about airjet yarn or yarn supply, welcome to browse our website or contact with Maw Chawg directly!

 

Article Source: http://www.buhleryarn.com/switzerland/en/airjet-yarns/?redirect_bypass=1

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Selecting Plasma Welding Machines

Plasma welding machines have become quite popular today. These machines have reduced their price also. There are many who are going out to purchase plasma cutting machines today. The machines cut electrically conducting metal with the help of a high velocity ionized gas that is brought out of a nozzle. The high velocity of ionized air turns into plasma as they conduct electricity from the nozzle. This plasma is used to cut the metal sheet as it comes into contact with it. The metal sheet is melted and cut along the desired line of cut with the help of this machine. This process is widely used in the industry today. This is a perfect method of cutting steel and non-ferrous material. This method is used by amateurs today too as it is easy and much more efficient than normal cutting tools.

 

There are certain guidelines that you should stick to when you are going to purchase a plasma cutting tool. Not only will this enhance your knowledge about the product but it will also help you make an informed decision about the product that you are going to purchase. The first factor that you need to consider when you are buying such a tool is the thickness of the material that you are going to be working with. For a material with high thickness you should go for a machine that has a high amperage rating. The higher the amperage rating the thicker metal you can cut. However, if you are working with thin sheets of metal then you can go ahead with a low amperage machine. The next thing that you should remember is the cutting speed or the production rate. If you require high rates of production or high cutting speeds, then you should go for a machine that has again, a high amperage rating. Lower amperage rating would mean lower cutting speeds. However, in thinner metal cuts, the quality of the cut is reduced. The optimal cutting speed would be obtained from a machine that has high amperage rating.

 

The pilot arc of the plasma welding machine often conducts with the air to produce high frequency. This sometimes causes problems with other electrical equipment that are around the machine. Therefore make sure that you manage enough space between the machine and the plasma cutting tool. This will ensure that your other equipment does not get damaged with the electricity that is conducted in the air while the machine is operational.

 

When selecting a plasma welding machine, you should be sure to view a product demonstration and also make a number of test cuts till you are satisfied with the machine. You should always try to go for a cutting machine that has a high pilot arc. This will give you more control over your work and would increase the quality of the work. Always purchase from a reputed manufacturer. Most of the manufacturers today provide total consumer support so you will have no problem with the machine afterwards.

 

MAY SHUAY specializes in manufacturing and marketing of high efficient and labor-saving turn key automatic welding equipment. We offer customers the options of laser welding machine, seam welders, precision plasma welding machine, inverter TIG welders, MIG welders and plasma cutting machine. Our variety and complete line of welding machines offer customers a one stop shopping selection. Welcome to browse our website to learn further details about plasma welding machine or other welders. Feel free to contact with May Shuay.

 

 

Article Source: http://EzineArticles.com/6108553

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Packaging Machinery: Bottle Rinser – About Bottling Beverages Packaging

From bottled water to sports drinks, juices, spirits and soda, there are a multitude of thirst quenching products on the shelves from which consumers can choose. But the way those products make their way into the bottles can vary depending on a number of different factors. Below are a few of the beverage choices available to the thirsty consumer, along with a brief explanation of some of the common machinery used to package the products.

 

Bottled Water

 

Arguably, one of the simplest packaging lines to create is the bottled water line. This is in part because almost all bottled waters are packaged in a nearly identical manner. A typical bottle of water will be packaged in a 16.9 ounce clear plastic bottle, with a flat, screw on cap and a wrap label. Repetition leads to simplicity and efficiency, so that many bottled water packaging systems will look nearly identical.

 

Bottle rinsers will be used to remove dust and debris from containers before the filling process in most applications. These packaging machines remove contaminants that may be left over from the manufacture of the bottle or that may accumulate during transport or storage of the bottle. Once rinsed, overflow filler can almost always be found after the container cleaning equipment. The overflow filler allows for a level fill on each and every bottle, which can be important when dealing with clear bottles.

 

Level fills create an appealing shelf appearance when the product reaches the customer. After the fill, either a spindle capper or chuck capper will normally be found, either of which will tighten the screw on cap consistently and reliably. Finally, a pressure sensitive labeling machine will wrap the label around the bottle, again allowing for consistent and reliable packaging. The loading and unloading of bottles may differ, with some using automated equipment and others using manual labor and the water treatment used may vary depending on the source. But the rinse, fill, cap and label applications will almost always be similar to those noted above. Using this basic bottled water system as the norm, we can look at some other popular beverages and the differences that are required when it comes to packaging machinery.

 

Carbonated Drinks

Carbonated beverages may present the biggest deviation from what we term the norm for this article. The unique filling machine used for carbonation is known as counter pressure filler. In general terms, the counter pressure filler will pressurize the container being filled and replace oxygen with CO2 to keep a beverage fizzy. Adding carbonation to a beverage will normally require a carbonator and a chiller, as low temperatures are also a necessity for carbonation. Other packaging machinery may vary as well, as carbonated beverages are more likely to use a variety of different bottle or can materials, come in various sizes and use different closures. While spindle and chuck cappers might still be used, as well as a pressure sensitive wrap labeler, carbonated beverages may use unique closures and labels that require a different type of machine. However, the biggest difference lies in the filling equipment and the counter pressure filler.

 

Alcohols or Spirits

 

Again, with alcohols and spirits the bottle size and shape may differ more than would be seen with bottled water. But surprisingly, much of the equipment may be the same. Overflow fillers can work with alcohol or distilled spirits, though gravity fillers may also be a popular choice. Capping machines may also be unique, in that bartop corkers are popular for corks, T-corks and other stopper type closures. Capsule spinners are also somewhat unique to alcohols and spirits, though they may be seen on olive oils, sauces and some other products. These extra machines will use heat or a spinner (for plastic or tin capsules, respectively) to provide tamper evidence and aesthetic value to the product. The biggest difference, however, will be the sensors used in the vicinity of the fill area on the packaging line. Many distilled spirits lines will use intrinsically safe sensors, floats, pumps and other components near the fill zone, to protect against the flammable properties that come with these products. Remote control panels will also be set up outside the fill area for safety purposes as well.

 

Thick Beverages and Particulates

 

Some creamy drinks or drinks with higher viscosities (without carbonation) may require a different type of filling machine, moving away from overflow and gravity fillers. The same is true of beverages with pulp or other particulates, like those found in some juices. Both pump fillers and piston filling machines are manufactured to handle higher viscosity products and the principles allow for particulates to pass through in a consistent manner. Different pump types and piston sizes will be used depending on the particulate size and product fill size. Other than the filling machine, other equipment will stay pretty standard, but will also show more variation than the bottled water line simply due to a wider range of product and package characteristics.

 

Of course, there are many other beverage types on the market, with new products emerging nearly every day. Other features of beverage packaging lines may include sanitary equipment to keep the product safe, as well as hot fills when pasteurization is necessary. While almost all beverage lines will include some type of bottle rinser or other container cleaning machine, other lines will incorporate unique machinery, such as the capsule spinner for distilled spirits. Though some similarities and consistencies have been pointed out for specific beverages in this article, it is always a good idea to speak directly with the machine manufacturer to ensure that the best equipment is built for and given packaging project.

 

KWT Machine Systems Co., Ltd. is the leading packaging manufacturer in Taiwan. We provide water and air cleaning systems, those are use in food filling applications to ensure food safety. The bottle rinser can utilize compressed air, wash liquid to clean or sanitize your containers prior to filling. If you have any interest in bottle rinser, welcome to browse our website or contact with KWT via email or phone.

 

 

Article Source: http://EzineArticles.com/8490351

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The Best Features of a CNC Flat Bed Lathe

A lathe machine performs multiple mechanisms such as shearing, sanding, turning, drilling, deforming, etc. over a range of materials such as wood, plastic and metal. With lathe machine it is easy to produce symmetrical objects. In recent years in order to provide quality solutions for several industrial needs many improvements have been implemented in designing lathe machines. A CNC lathe machine or computerized numerical controlled lathe machine is one of the innovative designs of lathe machines that have widely been used in the place of conventional machine types. It is a modern technology that does not require complete manual support for functioning. Above all CNC supports effectively in monitoring the accuracy of the machine activity over a computer screen.

 

Types of lathe

 

There are two main types of lathe machines that differ by means of the lathe bed elevation angle they are flat bed lathe machine and slant bed lathe machine. Wherein, flat bed lathe applications are widely used in heavy duty turning process with more productivity. We can rely on flat bed CNC lathe equipment for a reliable, stable and powerful shearing function. Productivity can be increased with the help of investing on flat CNC lathe machine irrespective of the model. Hence, the model has to be selected based on the respective industrial target in terms of dimension, thickness and the expected production ratio. Click here to know more about CNC Lathe Machine.

 

Applications and benefits of CNC flat bed lathe

 

A slant bed CNC lathe works on a spindle motor having the lathe bed alignment is in the slide ways and is especially effective in making Z axis motion which is relatively straighter. The CNC flat bed lathe on the other hand works effectively to obtain highly rigid accuracy where exact positioning of the metal is required. It is applied mainly for heavy duty cutting process. In general CNC flat bed lathes are mainly preferred to achieve accurate finishing along with the requisite thickness during the process of sliding, surfacing and screw turning. A CNC flat bed lathe machine is also designed in various forms to manage light and heavy metal turning process. In industries where more workshop machining works are done a flat bed lathe with CNC device is found to be more suitable option as we can get precise finishing and feel the ease of cutting, drilling in economic power consumption. Some of the popular industries where CNC flat bed lathe is highly preferred are

 

  • Mining
  • Shipping
  • Paper industries
  • Machineries
  • Power plants
  • Industries where drilling process is highly required
  • Shearing metal industries, etc.

 

Conclusion

 

Considering the common benefits of flat bed lathe equipment such as less power consumption, capacity to run 24 hours, easier programming, which requires less manual support this equipment can be suggested as a suitable option for mass production of symmetrical products. In addition, it is excellent machinery that can be used to achieve accuracy in curving, bending, and turning process of even complicated shapes and forms.

 

Myday machinery Inc. is a professional CNC lathe manufacturer who specialized in not only CNC lathes but also manual lathes. We supply CNC Flat Bed Lathe and CNC Screw Miller. If you need more specification and details about flat bed lathes, welcome to browse our website or contact with Myday directly!

 

 

Article Source: http://www.yashmachine.com/blog/the-best-features-of-a-flat-bed-cnc-lathe-machine/

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12 Different Types of Hand Saws Explained

Hand saws are useful, everyday tools perfect for various purposes from pruning green wood, cutting wood, logs, and even metal. Below are the types of handsaw that you can find at your local home improvement store or online store.

 

  1. Keyhole Saw

Also known as compass saw, a keyhole saw is perfect in cutting holes in wood and curves. Its blades are mounted on handle that is made of metal, wood or plastic and shaped like that of a hand gun. Keyhole saws have a cross tooth pattern with 10 to 12 teeth per inch. It is a push stroke handsaw.

 

  1. Cross Cut Saw

A cross cut saw has wide alternating bevel teeth perfect for rough cutting on wood grains where tearing out is not important. Its saw blade ranges from 55 to 70-centimeters with 8 to 12 teeth per inch.

 

  1. Panel Saw

Panel saws are perfect for cutting small pieces of wood. It is shorter compared to regular hand saws and is useful for its portability. Panel saw length can be as short as 46-centimeters with 8 to 12 teeth per inches.

 

  1. Rip Cut Saw

A rip cut saw is an aggressive, push stroke handsaw with sharpened teeth top. Its saw length varies from 60 to 70-centimeters with 5 to 7 teeth per inch.

 

  1. Back Saw

Back saws are used for molding, trimming and fine woodcutting. Back saws got its name from its reinforced upper edge made of brass or steel to prevent it from buckling during use. Its teeth are smaller compared to other types of hand saws grouped tightly together to achieve a fine cut. There are various subtypes of back saw like the mitre saw, dovetail saw, carcass saw, and gents saw, and tenon Saw. Back saw blade size can range from 20 to 40-centimeters.

 

  1. Wallboard Saw

Wallboard saws are push stroke handsaws perfect for puncturing through a wallboard or plasterboard. It has a plastic or wooden handle with pointed blades with coarse teeth.

 

  1. Flooring Saw

Flooring saws are perfect for mid-cutting when replacing floorboards. It is a push stroke hand saw with 12 to 15 teeth per inch.

 

  1. Coping Saw

Coping saws are perfect for cutting intricate patterns on wood. It has a sprung steel frame with a wooden handle that can be turned to tighten the blade. A coping saw is a pull stroke hand saw.

 

  1. Japanese Saw

Japanese saws are pull stroke saws made of very thin steel. It is known for its faster cutting power while producing less sawdust. A Japanese saw is also perfect for precision cutting on both hardwood and softwood. There are 3 major types of Japanese saw namely; dozuki, ryoba and kataba.

 

  1. Hacksaw

Hacks saws have fine, disposable blades held in tension by front and back pins. It is used in metal cutting such as thin tubing and drill rod with its 18 to 32 teeth per inch. Its finer blades can also cut through cables, wire ropes, light angle irons and channels. A hacksaw is a push stroke hand saw.

 

  1. Bow Saw

Bow saws are push and pull handsaws with a round steel frame that is shape like a bow. It is generally used for cutting logs with its crosscut tooth pattern.

 

  1. Pruning Saw

A pruning saw has a pistol grip with either curved or straight blades perfect for pruning and cutting green wood. It has a coarse tooth with a saw blade length ranging from 250 to 250-centimeters.

 

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Article Source: http://www.doityourself.com/stry/12-different-types-of-hand-saws-explained

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