The area of welding itself dates back as far as 1885 when two people by the names of Nikolai Benardos and Stanislav Olszewski invented the first electric arc welder. They were granted the patent for their invention a few years later. This welder was called an electric arc welder that had a carbon electrode called an Electrogefest. These two are men are considered to be the founders and creators of the modern welder that we see being used today as all models of welders came from the first that was created.

There are some people that are completely sure what welding actually is. There are a variety of definitions of welding but the most commonly used definition states that welding is a technique that is used to join metallic parts usually through the application of heat. So in a sense it is the art of burning to metals together in some way. Welding was first discovered during efforts to manipulate iron into useful shapes.

About the Author: James Hunt has spent 15 years as a professional writer and researcher covering stories that cover a whole spectrum of interest. Read more at www.1st-in-welding.info

The reason why sheet metal is widely used is because it can be easily changed in to a variety of shapes. Through a wide variety of processes sheet metal machinery and tools are used to do this.

Stretching

Sheet metal can be straightened by using a grip at either side of the sheet and stretching it. The sheet metal machinery and tools used to do this are able to pull the sheet metal beyond its elastic limit allowing it to come out flat. The affect of the stretching is that its temper will be slightly raised.

Stamping

This is a process that may involve one or more stamping stations to perform various actions on a metal sheet to create a final workpiece. As the metal sheet is passed through the work stations each one alters the shape by cutting, forming or drawing the piece. Each stamping station contributes to the final piece.

Cutting

There are a number of ways that Sheet metal can be cut, ranging from manually cutting the sheet using tin snips to using computer aided laser cutting. Tin snips can be extremely tricky - even frustrating to use, especially when the sheet curves. The use of computer controlled laser cutting allows for greater accuracy while at the same time reducing the amount of waste.

Laser cutting involves focusing a beam of laser light over the sheer metal heating and subsequently burning the metal. The edge of the sheet will be very smooth. Old Trumpf equipment laser cutters can be used to get a precision of around 0.01mm.

Bending

Bending can be carried out by sheet metal machinery and tools and is done to shape the sheet into various forms. A pressbrake is used to bend the metal into a shape that is determined by its die set.

Shearing

When the sheet metal is too big for use, then the sheet needs to be cut to size. This process is called shearing. This step needs to be carried out before any stamping can be started. Sheet metal machinery and tools ‘shear’ the sheet metal until the desired size has been achieved.

Deep Drawing

The deep drawing process involves sheet metal machinery and tools ‘punching’ blank sheet metal into a die set. It thus involves a transformation of the sheet metal into a desired shape.

There are many uses in industry for CNC machines. Routers drill holes, for example. Many CNC machines can perform a number of tasks at once, improving efficiency in the manufacturing process.

The technology behind these machines is Computer Numerated Control. This technology was developed in the seventies and it allows for a machine to be programmed in advance so the operations are set up to work almost automatically. The initial setup is a little complicated, but once that is done the machine is easy to operate.

A CNC router would be programmed to drill a hole repeatedly at certain intervals. This is much more efficient than manual calculation and drilling and eliminates inconsistency due to human error or fatigue.

A CNC lathe would be used to cut pieces of wood of uniform size and shape. Lathes can have horsepower ranging from 15 to 40 HP, and how much power is needed depends upon the job being done. A good CNC lathe will allow you to work at various levels of automation, so that you can work all manual, or all automated, or any combination in between.

The best mill available is the Bridgeport mill. Mills are designed to be used in both large industries and small milling shops, and the Bridgeport mill is built to last in any situation. The price is prohibitive, however, for individual use.

A CNC mill is considered specialty equipment. The concept is to use computer programming and robotic operation for speed and accuracy. This kind of speed and accuracy would be impossible to achieve for an individual. The airline industry frequently uses the CNC technology of Bridgetown mills; specifications are entered, and the mill automatically determines which functions to perform and how.

Engravers can also be CNC machines. Engraving can be done on many materials, including wood or wood composite, metal, stone or glass. These machines can do very exact engraving on materials from the smallest to the largest, and have the same result over and over.

1. Extreme Accuracy

A graduated dial and a vernier scale allow this rotary table to be positioned to a high degree of accuracy. The center of CNC milling equipment has hole that allows a morse taper center or fixture to be inserted. A tailstock is usually provided if the rotary table can be mounted from its end, so that the axis will be horizontal. The most common use of this CNC milling equipment is on it vertical axis that in this mode is on the same plane as the cutter when it is used on a milling machine.

2. Coaxial Design

If the CNC rotary table is mounted on a secondary table the work piece is adjusted in the center around the rotary tables axis, in this position the work piece is centered around the cutting tools axis; this make all three axis coaxial. Making a way for the secondary table to be offset in either the x or y plane so that the cutter is pitched at a distance from the work piece’s center allowing a simultaneous operations on the work piece.

3. Specialized Or General?

There are literally hundreds of CNC milling equipments available on the market today with different specifications and different additional features. They come in all types of shapes and sizes. Some are designed for specific applications, while others are more of general purposes in nature. When looking for the right CNC rotary tables, try to talk to people who already using this kind of equipments from them you can learn how this things work. The good thing about talking to this people is that you will gain information not based on industrial propagandas but on experience and uses of there CNC milling equipments. You can also visit a shop in your area so that you will ly see on how CNC rotary tables work. You can eve try to use one CNC milling equipment to know how it feels. You can also attend CNC seminars to be able to gain professional views about his matters and also do not forget to check online information sites.

4. Setting Up Shop

When setting up your CNC rotary tables make sure that the platform is stable and your CNC milling machine secure. Setting up your CNC milling machines is a critical issue to early success, the less movement that occur the better. The right material to be used should also be thought about when using this kind of CNC milling machines. Determine the right thickness and sizes of your materials. Also look for proper fixtures for your CNC milling machines, for this will save time, money and frustration when using your CNC rotary tables.

Before going into production, make a plan to test the different variables you need to work with for a period of time. Getting familiar with your machine is also a critical issue for success. Try to make familiar with the different types of cut, type of materials to be cut, the table type, the depths of cut, the feed rates and the type and sizes of bits that you will be utilizing. Feel around the machine but not literally though for it may I injure you.

5. Satefy

Make sure to read your manuals and have a thorough understanding about the safety measures and the different features of your CNC milling machines. Have a good idea on how this things works. On what it can do to make your business prosper and also on how it can harm your employees.

A plasma cutter works differently than a conventional welding torch. Rather than using a flame produced from a burning gas in the style of oxy acetylene welding, a plasma cutter uses a jet of inert gas such as compressed air, and then applies a very high voltage charge. The electric charge arcs through the jet of air, and ionizes the gas. The ionized gas reaches extremely high temperature, and becomes what is called plasma.

This highly charged and hot temperature jet of plasma is able to melt through metal at the point of contact without having a massive impact on the surrounding material. This makes a plasma cutter a very precise way of cutting metal.

For small jobs in a workshop where metal is being cut in order to make a bodywork patch, or a replacement panel, plasma cutters are the ideal solution. One of the most important aspects of plasma cutters is that they use an inert gas, meaning that you do not have to worry about storing volatile and explosive gases.

In the past, plasma cutters were a fairly imprecise and blunt means of cutting metal thanks to their large “flame”, however, thanks to advances in the materials and technology used to manufacture plasma cutters, they are now able to produce a much more focused flame. This means that you not only get a more exact and neater cut, but are able to do it with lower power.

Plasma cutters are available from under $1000. You can get a Firepower 12 amp plasma cutter with its own compressor that uses compressed air to create the plasma torch for $998.75. This tool, which is ideal for small jobs in any work shop, is flexible enough to carry out a range of tasks.

With a basic compressor driven plasma cutter, you get a torch with two settings. The pilot arc of plasma is ideal for burning off paint, while when you turn up the power; the cutter is able to cut through sheets of steel an eighth of an inch thick at a rate of around nine inches per minute.

By spending a little more, it is possible to get a more powerful and flexible tool. For less than $1350, you can buy a Lincoln Electric Welders Century 25 Amp Plasma Cutter. This tool is designed for effective auto body repair jobs, and provides a fully earthed cutting arc that removes the high frequency harmonics that are able to damage the complex electronics in a car.

The century 25 amp plasma cutter has its own built in compressor, which has an adjustable regulator to control the size of the actual plasma. This means that you can vary the intensity of the cutting edge of the tool, and deal with metals of different thicknesses up to 3/16” of milled steel, at an acceptable cutting rate.

At the top end of the plasma cutter market there are complex and powerful tools such as the Miller Auto Arc 4500 Plasma Cutter. This tool, which retails from around $2500, is a much more flexible and powerful cutter than most other models. Its 27 amp power supply, coupled with a strong compressor means that it can deliver a flame hot enough to cut through steel more than half an inch thick at an acceptable rate, and get through most body panel metal like a hot knife through butter.

As with all tools, it is important to select the one that fits in best with your business needs and budget. If you only require a lightweight plasma cutter for occasional jobs in the workshop, then an entry level model is perfectly acceptable, however, if you need to perform regular work requiring the tool, then getting a more robust model is an excellent idea, as the tool will more than pay for itself over time thanks to its reliability and ability to cut through metal much faster and let you get on with work more quickly.

About the Author:

Jason has been in the construction equipment and industrial sales business for over 10 years. He owns and operates Red Hill Supply to better serve the automotive and industrial industries. - Air Compressors

Many small fabricating shops, and even individuals are finding the accuracy and versatility of a CNC router very useful. As used equipment becomes available, more and more will be in demand since the price is lower for used equipment.

But they are still an expensive addition to the home shop, and plans to make your own have now become available in sizes as small as 15X15 to 50X60. The use of the machine would determine the size.

A CNC router allows a worker to create many projects that would be very time consuming and sometimes almost impossible to do otherwise. Cutting a complicated design into wood or even putting inlays into it are difficult for even the most skilled of carpenters, but with a CNC machine, these are done easily and accurately.

This makes CNC routers ideal for furniture making. The software for the machine allows you to design patterns or to do signs, once you know the software, and learning the software is not difficult.

The smaller machines, typically for the home shop worker, only require 120 voltage and can therefore be run on household current. These smaller table top machines only require 1 or 2 HP motors and are within the range of a hobbyist. A large machine can cost upwards of $20,000 while these smaller ones are about $7,000. Used machines are usually half the price of new ones, so for an investment of $3500, a home shop can have a very versatile machine. If someone were interested in making furniture for sale, it would pay for itself in no time.

A used CNC router therefore is quite a bargain. At half the cost of a new one, it is a very attractive option. Just make sure you shop around and determine the best machine for the type of machine work you will be doing. The used machines are older, and therefore not as fast as the newer machines. For the home shop this may not be as important an issue as price.

Used machines are available that have been rebuilt and these are a very good value as a rule. After a thorough inspection any worn or damaged parts of the machine are replaced and the result is a machine that is so good that many of the companies who do this are able to offer a warranty on the machine.

It is also important to have support available from the company. This will allow you to get installation instructions, and may also entitle you to free training on the software. If you are buying and using such a machine for the first time, this may be very important. You will want to make sure you are dealing with a company that can give you help and support in case you need it. A manual is important to have, but it may not answer all of your questions.

About the Author:

Eric Slarkowski very often edits news on information related to cnc machines and wood router. His writings on cnc router are published on http://www.insidewoodworking.com/cnc/cnc_router.html

The nature of the mini CNC machine creates three ways by which miniaturization can pave the way for cycle time reduction. This article will list three ways by which a manufacturer can reduce cycle time. It will also provide details concerning how the mini CNC machine permits the manufacturer to apply the principles of cycle time reduction to the operation of the mini CNC machine, and ultimately to the process of machine production.

The effort to reduce the manufacturers cycle time begins with an attempt to minimize the amount of time that operators spend loading and unloading various materials. The operator of a CNC machine will work more efficiently if he or she is able to minimize the workplace loading and unloading. This minimization is achieved through use of the mini CNC machine.

The operator of the mini CNC machine can save time by using large bed sizes and a small footprint. The operator of a mini CNC machine will save money by loading into the machine a wide piece of material and then limiting each process (cutting, engraving, routing, and drilling) to a small footprint.

The operator of a CNC-based piece of equipment can reduce cycle time by reducing the tool maintenance time. Such a reduction is made possible by the mini CNC machine. The small size of the miniaturized machines facilitates the creation of multiple design options. The large number of options leads to creation of a generous number of spare parts. Meanwhile the surplus of spare parts guarantees the ready replacement of any malfunctioning parts.

The operator of a mini CNC machine also reduces cycle time by decreasing the program execution time. The clamping of small elements to the mini CNC machine and the automation of the tiny machine parts leads to a lowering of operator intervention. Whenever operators can afford to devote less time to matching the quality of a previous result, then the manufacturer saves money.

It thus becomes obvious that the characteristics of the mini CNC machine guarantee the application by the operator of the principles of cycle time. Three aspects of any CNC program fall under the control of the product manufacturer.

1) The time required for workplace equipment to accomplish the loading and unloading of the material that requires a transformation (a cutting, drilling, routing or engraving),
2) The length of the program execution time,
3) The length of the tool maintenance time.

The ability of a mini CNC machine to substantially alter any of the above three aspects could lead to a reduction in cycle time. A reduction in cycle time could improve performance

The language that these machines use is called G-code. G-code has been around since the early 60’s. There are a number of variations of G-code, but most are very similar to one another. See the previous section for a sample of G-Code.

We will need to use a computer to talk with our CNC machine. Our computer will send signals to our CNC machine. In-between our computer and our CNC machine sits a controller. A controller converts commands into signals that are used to control the motion of our machine.

As these signals are sent out of the CNC controller, they go to either stepper or servo motors. This is how we create motion. These motors drive our various axis on our CNC machine. While we are moving our axis, there is generally a cutting tool of some sort removing material. This is the machining process coupled with CNC.

Here is a brief description of the two types of motors generally used in CNC:

Stepper motors:

Simple design
Easy to use
Generate torque at low rpm
Do not know their position in relation to the program

Servo Motors:

Generate torque at high RPMs
Generally need gearing of some sort to be effective
More sophisticated
Can maintain their relative position, thus, they can be more accurate

CNC Machine Controllers

Controllers generally stand alone near the CNC machine. They act as a translator between your control computer and your CNC machine. Generally, they add quite a bit of cost to a CNC machine as well. Controllers can cost anywhere from $1000-$20,000 or more depending on their sophistication.

About the Author:

Ivan Irons loves CNC Control and CNC Controllers.

In the past few years many people have considered purchasing a used cnc router or a new one for their home use. Some smaller shops have also bought them for a variety of purposes. You can save a lot if you go for a used machine instead of a new one.

You can also follow certain plans online that can teach you how to create your own. You can make one to suit your purposes from 15 x 15 up to 50 x 60 inches.

Using a cnc router can help you complete projects that you wouldn’t be able to on your own. You can create patterns and lay down metal inlays onto wood. Your creations will be smoothly done and correctly done. It will help you accomplish tasks you couldn’t do by hand alone.

If you want truly pro results when it comes to crafting furniture then a cnc router can help you out. Using special software will help you to program things exactly so you get the cuts you want. Use for engraving anything you want from a outdoor sign to the smallest cnc lettering. Once you know how to operate the machine and software, you can create virtually anything.

You can find a small machine that can be operated in your home with just a normal 120 voltage. This type of machine would be good for home use. These kind of machines have motors that range from 1-2 horsepower. These small models run about $3,500 used or $7,000 new. This makes buying a used machine a great option for your home. If you wanted to get a large machine this could cost $20,000! This is more than most people want to spend on their home equipment. If you are buying one for a potentially profitable business, then this might be a consideration.

You can save about half if you buy a router used. You can get all the power from it, a save twice as much! When you are looking around for a router shop carefully. You should determine your exact needs and then find a machine that will handle them. If you get a used router you should remember that it may be a bit slower than a new one, but if you don’t have large volume then it should be OK for you.

About the Author:

Focusing recent findings in cnc machines, Kurt Schefken publishes primarily for http://www.insidewoodworking.com.