Excellent CT-1118CNC Model CNC Toolroom Lathe in Cyclematic Machinery

Today, I’m going to have a simple introduction about one of CYCLEMATIC’s toolroom lathes for you. That’s CT-1118CNC model CNC toolroom lathe.

 

“Center Turning Also Gang Turning on New CT-1118CNC”

CT-1118CNC Toolroom Lathe

CT-1118CNC is the NC upgrade from CTL-618EVS manual toolroom lathe. It keeps the original machine’s durability and elegant exterior while automating it with servos and CNC control.

 

With CT-1118CNC’s 2008 redesign, Cyclematic goes even further, the ability to use tailstock and lathe center to perform shaft work is maintained, but more importantly an innovative tool plate design adds the capability to remove the compound tool post and swap in T-slot gang tool slide in its place.

 

The gang tool slide great work with a new complete line-up of tool holders from Cyclematic for gang tool turning. Either traditional lathe tooling setup or gang tool setup are easy to swap out and exchange for the other. Now CT-1118CNC is the ONE CNC toolroom lathe that can bring you TWO different styles of machining capability.

 

Features of CT-1118CNC Model CNC Toolroom Lathe:

 

  • Guaranteed Circular Accuracy to 50 millionths of an inch
  • Fanuc 0i Mate-TD Controller (standard), Optional with other brand.
  • Powerful 3 HP motor (5HP-Optional) with Yaskawa current vector inverter drive for improved torque response at low end.
  • Spindle mounted on high precision preloaded angular contact ball bearings
  • Precision ballscrew on X, Z-axes
  • Protection guard on Z-axis ballscrew
  • X, Z-axes feeds drven by AC Servo Motor
  • X, Z-axes ballscrews directly coupled to AC Servo Motor, minimizing backlash
  • Fast lever collect chucking
  • Power collet closer
  • Optional gang tooling option
  • Wide variety of accessories to increase versatility

 

Want to obtain further details about toolroom lathes? Please don’t hesitate to check out Cyclematic’s website right away. More information about CT-1118CNC are all can be found on their product pages and feel free to send inquiries or contact CYCLEMATIC directly.

 

CYCLEMATIC MACHINERY CO., LTD.

No. 20, Lane 50, Ming Shen Rd., Shen Kang Dist., Taichung 429, Taiwan

TEL: 886-4-2562-5393, 2562-6509

FAX: 886-4-25620298

E-mail: cymatic@ms23.hinet.net

Everything You Need To Know About CNC Equipment

CNC machines are electro-mechanical devices that manipulate machine shop tools using computer programming inputs. Did you know? The name “CNC” actually stands for Computer Numerical Control and it represents one of two common methods to generate prototypes from a digital software file.

 

The first CNC equipment was developed in the 1940s and 50s and relied on a common telecommunication data storage technology known as “punched tape” or “perforated paper tape.” Punched tape technology is long obsolete as the data medium quickly transitioned to analog and then digital computer processing in the 1950s and 1960s.

 

How Does CNC Equipment Works:

 

Machining in general is a way to transform a stock piece of material such as a block of plastic and arrive at a finished product (typically a prototype part) by means of a controlled material removal process. Similar to the other prototype development technology, FDM (3D printing), CNC relies on digital instructions from a Computer Aided Manufacturing (CAM) or Computer Aided Design (CAD) file like Solidworks 3D. The CNC machine interprets the design as instructions for cutting prototype parts. The ability to program computer devices to control machine tools rapidly advances shop productivity by automating the highly technical and labor intensive processes. Automated cuts improve both the speed and the accuracy with which prototype parts can be created – especially when the material is critical (such as is the case with polypropylene – read more about polypropylene).

 

Oftentimes machining processes require the use of multiple tools to make the desired cuts (e.g. different sized drill bits). CNC equipment commonly combines tools into common units or cells from which the machine can draw. Basic machines move in one or two axes while advanced machines move laterally in the x, y axis, longitudinally in the z axis, and oftentimes rotationally about one or more axes. Multi axis machines are capable of flipping parts over automatically, allowing you to remove material that was previously “underneath.” This eliminates the need for workers to flip the prototype stock material and allows you to cut all sides without the need for manual intervention. Fully automated cuts are generally more accurate than what is possible with manual inputs. That said, sometimes finishing work like etching is better accomplished by hand as well as simple cuts that would require extensive design work to program the machine for automation.

 

Want to learn about the different types of CNC equipment? Read more below.

 

Types of CNC Equipment:

CNC machines typically fall into one the two general categories: conventional machining technologies and novel machining technology:

 

Conventional Technologies:

 

  • Drills:

Drills work by spinning a drill bit and moving the bit about and into contact with a stationary block of stock material.

 

  • Lathes:

Lathes, very much the inverse of drills, spin the block of material against the drill bit (instead of spinning the drill bit and putting it into contact with the material). Lathes typically make contact with the material by laterally moving a cutting tool until it progressively touches the spinning material.

 

  • Milling Machines:

Milling machines are probably the most common CNC equipment in use today. They involve the use of rotary cutting tools to remove material from the stock unit.

 

Novel Technologies:

 

  • Electrical and/or Chemical Machining:

There are a number of novel technologies that use specialized techniques to cut material. Examples include Electron Beam Machining, Electrochemical machining, Electrical Discharge Machining (EDM), photochemical machining, and Ultrasonic machining. Most of these technologies are highly specialized and are used in special cases for mass-production involving a particular type of material.

 

  • Other Cutting Mediums:

There are a number of other novel technologies that use different mediums to cut material. Examples include laser cutting machines, oxy-fuel cutting machines, plasma cutting machines, and water-jet cutting technology.

 

Materials Used:

Almost any material can be used in a CNC equipment. It really depends on the application. Common materials include metals such as aluminum, brass, copper, steel, and titanium, as well as wood, foam, fiberglass, and plastics such as polypropylene.

 

Application for Rapid Prototyping:

CNC equipment was the first major break-through in the field of rapid-prototyping. Before numerical control (in the case of punched tape technology) and computer numerical control (with analog and digital computing), parts had to be machined by hand. This invariably led to larger margins of error in end prototype products and even more so if/when machines were manually used for larger scale manufacturing.

 

Application for Manufacturing:

Many novel CNC specialty machines are built specifically for niche manufacturing processes. For example, electrochemical machining is used to cut highly durable metal products not otherwise feasible. Conventional CNC equipment is more adept at and typically used for prototype development than manufacturing.

 

By the way, when mentioned CNC equipment, I recommend that you can try to visit the website of SEHO Industry Co., Ltd. if you need more information about CNC machinery. SEHO is the professional supplier of specializing in new or used CNC machinery. They adopt stock supply, you can visit their website to check out the machines that can quickly meet your demands of urgent orders. Now, to obtain further details about excellent CNC equipment, please don’t hesitate to contact with SEHO.

 

Article Source: https://www.creativemechanisms.com/blog/everything-you-need-to-know-about-cnc-machines

How to Use a Tool and Cutter Grinder

Usage of Tool Grinding Machine

A tool and cutter grinder is used to sharpen the edges of tools that have gone dull. The tool grinding machine is not a toy and takes special care and training in order to operate correctly. The tool and cutter grinder is also a rather large machine found in machine shops. It is recommended to take your tools to a professional to grind and sharpen them. The following article will explain how a professional operates a tool grinding machine.

 

4 Steps to Correctly Use Tool and Cutter Grinder

Step 1 – Prime the Machine

It is always a good idea to turn the tool and cutter grinder on to warm it up. A cold grinder will create rough cuts while a warm or hot grinder disc will produce the best result. Allow the tool grinding machine to run for several minutes before taking tool to the grinding disc.

 

Step 2 – Safety Precautions

Just looking at the tool grinding machine suggests a medieval torture device. There is a lot of moving parts, guides and rails to worry about as well as the grinding disc itself. Always wear heavy work gloves when using the machine. You also need to wear safety goggles. The grinding disc is typically abrasive and made with diamonds. When grinder begins to sharpen the tool it can cause small fragments of the tool, the disc or sparks to fly toward your face. Getting any of these superheated fragments in your eye can be very dangerous.

 

Step 3 – Examine the Tool

Not all tools are made the same and it is important to examine the tool you are about to use the tool grinding machine on. You are looking for the angle of the tool, including which way the blade is curved, how the edges are cut and the contact points. This is incredibly important because to properly use the tool and cutter grinder you need to know what direction the tool needs to go. If you fail to do this, you can severely damage the tool you are trying to bring back to life.

 

Step 4 – Using the Tool Grinding Machine

Double check all of your safety areas and examine your clearance. The kind of tool you are using will determine what the settings need to be. For this information you should always consult the instruction manual that came with the machine you have access to. Not every tool grinding machine is the same when it comes to this. Turn the machine on and keep a safe distance from the grinding disc. Remember the curvature of the tool you are sharpening and place it against the grinding disc at the appropriate angle. A knife, for example, would be approximately 45 degrees. Use short movements and firm pressure until you are satisfied it is sharp.

 

Top Work manufactures cutter grinders and tool grinders, including universal tool grinder, CNC tool grinder and monaset tool grinder. They specialize in the grinder development to diversify our products and elevate the quality. Quality is an essential, inseparable part of every process at Top Work. For more information about tool grinding machine, welcome to check out Top Work’s website right away!

 

Article Source: http://www.doityourself.com/stry/how-to-use-a-tool-and-cutter-grinder

The Way of Choosing the Right Surface Grinder

The surface grinder you need will depend largely on the material that needs grinding. For instance, if any metal surface needs grinding, the grinding wheel should be made of a highly abrasive material, and it should have numerous cutting niches embedded in it. On the other hand, for grinding a wooden surface, what you need is a lesser abrasive wheel.

 

The Types of Surface Grinder

 

There are two basic types of surface grinders, and they are:

 

  • The Planer-type
  • The Rotary-type

 

In the Planer-type, the grinding wheel remains stationary, while the worktable moves in a back-and-forth motion. This movement is controlled either manually or through some hydraulic drive system. These grinders are selected when overall grinding is required once the machine component has left the foundry.

 

In the Rotary type, the grinding wheel rotates, as does the circular worktable. These rotary surface grinders are selected when the precision machine parts require grinding, before being fitted into its housing. In both the surface grinder types, the safety hazards are well taken care of, and because of this, accidents rarely happen.

 

Things to do After a Surface Grinding Job Is Over

 

After a surface grinding job is over, the entire work station should be cleared of debris. If the work was done on a wooden material, the saw dust may be supplied to those who make composite boards, while the shavings from the metal surface can be sent to steel mills for melting.

 

However, what matters most is the safe clean-up of the work area, as otherwise, someone might get injured from carelessly thrown bits of metal shavings. Also, the surface grinder needs attention after each operation. It should be checked for any flying debris that blocks its air vents or any damage caused to the moving parts.

 

TONG YI Machinery Inc. is the outstanding rotary surface grinder manufacturer in Taiwan. If you need more information about kinds of surface grinding machines, welcome to visit their website and feel free to send inquiry or contact with them.

 

 

Article Source: http://EzineArticles.com/6191258

Features of A Turret Milling Machine

Through This Article, You Can Get More Features And Introduction About Vertical Turret Milling Machines.

 

A milling machine is a highly versatile machine tool which is used for machining solid materials. It can execute a large number of operations that includes cutting, planing, drilling, shaping, contouring, die sinking, etc. Milling machines are basically classified in two forms, such as horizontal and vertical, which actually refers to the orientation of the main spindle. In a horizontal machine, the cutting blade extends horizontally. While in a vertical machine, the cutting edge is held vertically above the work piece.

 

About Turret Milling Machine And How Does It Work?

 

The turret milling machine is one of the sub categories of the vertical milling machine. It primarily operates by moving the table around the cutting blade in all the directions. This milling machine has the ability to cut various types of objects. The vertical turret milling machine consists of a stationary spindle and a table which is moved in the perpendicular as well as parallel direction to the spindle axis, in order to cut the work piece. This type of machine provides various methods of cutting with the help of a quill. The quill enables the milling cutter to be raised and lowered in the vertical direction for cutting the required material.

 

A wide range of turret milling machine are now available in the market. They have a variety of features, functions, dimensions, and specifications. Hence vertical turret milling machines are regarded as the most versatile milling machines. However, the large machines are complicated to operate. This is due to the fact that as the machine size increases, the upward and downward movement requires considerable effort, and it is also difficult to reach the quill feed handle. They are therefore preferred for die sinking operations that involve machining a mold into a block of metal.

 

Features of Vertical Turret Milling Machine?

 

Moreover, the turret milling machine can be repositioned anytime for improving the functionality of the machine. This highly resourceful milling machine comprises of several options for aligning the spindle in a number of positions. It has a unique design and a sturdy structure. Besides this it includes various user friendly features and has greater functionality. This highly effective machine is also well known for its low maintenance and high performance. And since it is a multi-purpose machine it has the capability of manufacturing a variety of products. It is particularly suitable for producing a wide range of automobile parts. In fact this vertical milling machine is relatively less expensive than the horizontal milling machines; and hence they are more commonly used throughout the world.

 

One of the latest features of these vertical turret milling machines is the use of computer numerical control technology, which is popularly known as CNC. Using this modern technology, the user can input simple as well as complex instructions for operating the different parts of the machine. The CNC technology also helps to increase the productivity of the user, and also enables them to continuously produce a large quantity of accurate and similar products. Some of the recent models also include a hand held remote control with buttons for machine feeds and spindle movements.

 

By The Way

 

TOP-ONE Machinery Co., Ltd. is dedicated to achieving 100% customer satisfaction by supplying world-class quality products and services. TOP-ONE provides you the best vertical turret milling machines with high quality and competitive price. To obtain further details about milling machine series, welcome to check out their website and feel free to send inquiry to TOP-ONE.

TOP-ONE Machinery

 

 

← Click Here Go to TOP-ONE!

 

Article Source: https://ravimachines.com/features-of-a-turret-milling-machine/

Taiwan Leading Tapping Center Supplying Expert – Ares-Seiki

Looking for the best tapping machines? Check out the website of Ares-Seiki right away.

 

Established in 1994, ARES-SEIKI is the company of specializing in manufacturing tapping machines for years. They provide full series of CNC tapping centers:

 

  • A series has the highest cutting tool capacity and is built for extremely intricate processing.

 

  • R-series has a simple structure which is designed to maximize product quality.

 

  • S-series feature dual work stations, rotary worktables, and moving column structure allows operator to effectively reduce idle time needed to change workpieces during machining.

 

Ares-Seiki followed the maxim “Quality as Priority Guarantees Durability, Perpetual Service Ensures Vitality.” Years of affirmation by its clients both domestic and abroad confirms that Ares-Seiki delivers tapping machines of high quality and functionality, and its service is exceptional.

 

Insisting on maintaining the same standards and quality as advanced countries, the company was EMC and CE certified in 1996, ISO9002 certified in January of 1999, and TUV of Germany granted ISO9001-2000 certification in 2002.

 

Providing the client with both top quality advanced machinery as well as excellent after sales service is a tradition for Ares-Seiki. If you need further details about tapping machine and their company profile, try to visit their website and feel free to contact with Ares-Seiki.

 

Click Below for More Details:

Ares-Seiki Tapping Machine Supplier

NO.256, Tu-Cheng Rd., Da-Li, Taichung, Taiwan 41274

Tel: +886-4-24925555

Fax: +886-4-24966959

E-mail: ares999@ms16.hinet.net

What Are The Advantages of The Power Chuck?

Power chuck is a mechanical device used to clamp the workpiece on machine tool, clamping characteristics of high precision, small abrasion, large clamping force and stability, good dynamic balance, especially suitable to the high speed of CNC lathe, power chuck has been integrated into the life of each one of us, for our life to bring comfort and convenience.

 

What are the advantages of the power chuck? Details are as follows:

 

  • The power chuck clamping in the use of the workpiece, and the clamping force is stable and adjustable, in addition to improve the work efficiency, but also can achieve more than one person to operate CNC machine tools, greatly reduces the cost of human resources, but also reduce fixed investment in equipment.

 

  • Chuck device traditional installation is very complicated, even are very professional needs for two or three days’ time, and now the power chuck the only needs one hour, improves greatly efficiency for the whole installation process.

 

  • The advantages of simple installation, high efficiency. Compared with the traditional chuck, it only needs a simple click switch, automatic centering can realize the workpiece, the other power chuck can make operation of the people at the same time control several equipment.

 

  • To reduce staff stress, so that they can easily go to work, thereby reducing the high strength pressure.

 

  • In the treatment of original technology, greatly prolongs the service life of chuck.

 

Power chuck is an important part of power transmission and motion in machine tool. Because the pneumatic chuck is reliable, quick action, convenient operation, so it is widely used in modern machine tool.

 

Di Chun Iron Work Co., Ltd. is a Taiwan professional power chuck manufacturer. If you are looking for high quality chucks, please don’t miss their website, Di Chun can offer kinds of the best power chucks for you to select. Feel free to contact with Di Chun Iron Work.

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Di Chun Iron Work -Taiwan Excellent Power Chuck Manufacturer

 

 

Article Source: http://www.czivyf.com/en/newshow.asp?ID=105

Main Features and Benefits of CNC Milling Machine

CNC (Computer Numerical Control) milling machine is one of the common machine tools in machinery industry. It is the popular form of CNC that can perform those repetitive tasks of drilling and turning that used to be human jobs long time ago.

 

CNC Mills are classified based on the number of axes that they have. Axes are labeled as x and y for horizontal movement, and z for vertical movement.

 

Basically, this milling machine has four axes which are Milling Head Z, Table Z, Table Y, and Table X. The quantity of axes it has is often presented in many different ways.

 

For example, there is a five-axis machine. The extra 5th axis is in the form of a horizontal pivot for the milling head that ensure the excellent flexibility of machining with the end mill at an angle follow the table.

 

It is usually programmed by using a series of standard commands that we named it as G-codes to represent specific CNC tasks in alpha-numeric form.

 

There are many different sizes for this machine based on the purpose and location of usage, as well as the materials that need to be cut.

 

Besides that, the size of motor affects the speed of cutting the materials. Normally, materials like plastic and wood are the easiest things to cut, unlike steel that need stronger milling machine and longer time.

 

To evaluate the performance of milling, we can look at its rigidity. For example, the more rigid a mill is, the more precisely it drills and cuts. CNC mills normally have better & tougher engines for higher rigidity compared to manual counterparts.

 

With CNC milling machine, we can improve the speed of cut compared to manual operation. It also reduced the rejection when rigidity results increased. Thus, in long run business, it will indeed save a lot of time and overhead due to less wastage happened.

 

Another benefit is the accuracy of cut through CNC milling machine with a computer numerically controlled machine. In production line, it is very important to have all the parts produced exactly the same. However, nothing is perfect. CNC milling machine may also have a possibility of fault lies in the operator due to a mill can cut with absolute precision as close as.0001 of an inch.

 

In addition, many mills have beds that are able to move at different angles for easy cutting jobs, different angled cut as well as more difficult drilling operation. This is one of the benefits over manual mills.

 

Lastly, with the automated cooling systems, it is able to maintain the quality of raw material by spraying or blasting the hot metal or even tooling with specially formulated coolant.

 

With the benefits of CNC milling machine stated above, it is really worth the money to invest a CNC milling machine for your business use. And there are the popular brands that available in the market, such as Mori Seiki, Dahlih, CNC Takang, DMTG, Mastika, HACO, Takisawa, Okamoto, Creator, Agma, L & L, Hurco, Okuma, Extron, Enshu, Equiptop, Komatsu, Jiuh Yeh.

 

For more information about machine tools like CNC milling machine in Taiwan, please visit the website of Jiuh Yeh Precision Machinery Co., Ltd. They are the manufacturer of specializing in bed milling machine and other machinery.

 

 

Article Source: http://EzineArticles.com/5335304

Introduction of CNC Mini Lathe Machine

The CNC Mini Lathe is a perfect addition to any shop. It can be used to train employees on how to use CNC technology or how to just operate it manually. The mini lathe machine will usually incorporate both CNC technology and manual operation. Not only is this a great learning machine, but it also works well for the hobbyist.

 

Lathe machines are designed to operate with wood, aluminum or brass. The mini machines work on the same basis as its grown counterparts. Even though you will not be able to the type of work with a mini machine that you would with a large lathe machine, as in long runs, etc, you will still be able to create projects on the same basis. Carve, etch, taper, you name it, the CNC mini lathe can still do it.

 

The great thing about CNC technology is that with the software program you can recreate any project over and over. It could be years in between that same specific project and all you have to do is download the same software again and the project will turn out to the exact same measurements and specifications as the original.

 

Many people create their own versions of the mini lathe machine. Homemade DIY mini CNC machines can be created, but you must have some sort of knowledge about how the CNC technology works, computers, circuitry, the different axes that is used, etc. There is actually quite a bit of stuff that goes into a computer numeric controlled machine that incorporates robotic technology.

 

CNC mini lathes come in a variety of sizes, believe it or not. Some offer higher rpm rates. They usually operate on two or three of the axes and those are X, Y and sometimes X, Y, and Z. By knowing about the different axes and the type of movements that can be created using a combination of the axes, you will really be able to create some amazing projects.

 

Most of the time the program interface that is used with CNC mini lathes is very simple to operate and you can find the ones that even operate off of Windows. Different graphic programs can be used and then turned into a program that the machine will then duplicate. Just imagine all the different things that you can do with this sort of technology.

 

A variety of different manufacturers offer versions of the mini lathe machines and if you have any questions all you have to do is contact them. They can help you to even determine what size of the mini lathe machine would be perfect for you.

 

Jenn Wei Machinery Co., Ltd. is the company of specializing in CNC mini lathes and other lathe machines and turning centers. If you are interested in learning more information about mini lathe machines, try to visit Jenn Wei’s website, you’ll find out the details you want to know.

 

 

Article Source: http://EzineArticles.com/3057235

Advantages and Disadvantages of CNC Machining Vs Manual Lathes

While the Metal Spinning industry is ploughing its way through making hundreds and thousands of machine spun products, you have to wonder what the advantages are and disadvantages of CNC (Computer Numerical Control) machines compared to manually operated center Lathes?

 

CNC machines are very expensive to buy; however as the years move on the cost is decreasing due to the development of more efficient CNC models (and software). Manual lathes are cheaper to buy and require less setting up whereas CNC machines require you to either have somebody install and set it up or you can do this process yourself.

 

Size matters! If you are an SME (small to medium size enterprise) you may not have the space available for a CNC machine. Most models take up more than space then a manual lathe. CNC’s can contain and collect unwanted debris compared to manual lathes where the debris fall to the floor, making it a trip hazard and generally making the workshop look untidy.

 

CNC machines can be operated by one person. That one person can attend to more than one machine due to the machine producing all the work, with only a need to either change the tooling, replace a finished product with a new piece of material or to collect and dispose of material debris. Little training is needed for this one person to work the CNC machine. This is declining the need for skilled manual lathe workers, putting people out of work, and threatening the industry with less people being taught in the art of manual machinery type jobs.

 

CNC machining is reliably 99.99% accurate, and can produce products four times quicker than on a manual lathe. The other .1% is when the product dimensions can sometimes be off by up to 0.5mm, often this is due to the type of material, the temperature of the environment or the tooling being faulty; however this is a very rare occurrence. The machine is designed and programmed in such a manner that thousands of products with the same dimensions can be manufactured with complete accuracy and just with a single command. Even though the advantage to a CNC machine is that it can produce products with speed and accuracy, there are some jobs it can’t do, that a skilled worker can achieve on a manual lathe. But the downside to this is that human error can’t product a perfect product every time.

 

The CNC machine can be operated 24 hours a day, all year round, only stopping for maintenances. At the same time, updating the software can improve performance and speed. Depending on the type and size of job the CNC is required to do; renewing the tooling can be both cheap and expensive.

 

Prototypes are often required by the client before making the actual product. This could be to make sure the product has been designed correctly and can be made to the exact specifications. Finding a fault in the design early in the product life cycle will mean the design can be altered and will save time and money. The CNC machine does have the software that can simulate prototypes, therefore eliminating the need to use the CNC machine to make a physical prototype. This is another way to save money and time.

 

There may be more positives for the use of a CNC machine, but it would be wise if a SME wants to invest in a CNC machine, to always keep the manual lathe process within the company and not always rely on CNC machines. Although they allow for a much faster and accurate production line and eventually it will pay for itself, there is always the possibility that It could break down, so a backup of manual lathes can at least keep up with the constant demand of work should the need arise.

 

Shun Chuan is a professional lathes manufacturer who specialize in producing CNC lathe and manual lathe for more than 15 years. They insist to manufacture the efficiently and high-performance lathe machines for clients. Also, Shun Chuan dedicates in research and development to innovate lathes to meet the clients’ demands in top standard.

 

Find the suitable CNC lathe or manual lathe you need, welcome to check out Shun Chuan’s website to see what excellent lathe machines they can offer you.

 

Article Source: http://www.excellmetalspinning.com/advantages-and-disadvantages-of-cnc-machining-vs-manual-lathes/