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Wednesday, July 16, 2008

How does Plasma cutting

How does plasma cutting compare to oxyfuel cutting?
Plasma cutting in any type of conductive metal - steel, aluminum and stainless are just some examples. With mild steel, operators learn faster than thicker cuts with alloys.

Oxyfuel cuts by burning or oxidizing, the metal is separation. It is therefore limited to steel and other nonferrous metals, the oxidizing. Metals like aluminum and stainless steel form an oxide, that further inhibits oxidization, so that conventional oxyfuel cutting impossible. Plasma cutting, but not on the oxidation to work, and thus it can cut aluminum, stainless steel and other conductive material.
Plasma cutting 
While other gases can be used for the plasma cutting, most people today use compressed air for the plasma gas. In most shops, compressed air is readily available in plasma and thus does not require fuel gas and compressed oxygen for the operation.



Plasma cutting is usually easier for the beginner to master, and on thinner materials, plasma cutting is much faster than oxyfuel cutting. But for heavy steel profiles (1 inch or larger), oxyfuel is still preferred because oxyfuel is usually faster and heavier plate applications, very high-capacity power supplies are required for plasma cutting applications.

Saturday, July 12, 2008

CNC Controller

Machine Controller
Machine Controller take your editing instructions from your G-code and converts the G-code in motion. You are out of the race. The controller interprets the signal impulses from your computer Control and instructs the machine to move.

The machine controller is made up of various electrical components. Remember that I said earlier, some electronic junkies flock to CNC. This is the reason why, machine controllers can be built, if you are savvy with a soldering iron. I myself am not. Personally, I always default to order a machine control from one of my sources.
Machine control

Controller builders to me are electronic gods. You mix power sources, match up Amp, volts, etc. in the element t need. In general, you can use the number of axes you want to build them before the controller. For example, if you build a CNC plasma cutter can be a two-axis controller. Possibly a three-axis controller, if you have a flashlight height. If you have a milling machine, or a wood router in mind, then a three-axis is your ticket. If you want a machine with rotational axis, then you need a four-axis controller. So on and so forth

What is a G-Code

What' s G - codes
G-Code is the common name for the programming language of CNC machines. Somewhat of a generic, catch-all type of term for CNC programming language. Very few machines ad here to this standard today. There are as many varations as there are manufacturers

This is how I think of G-Code. It is a simple language built off of the carlesian Coordinate system for motion control. That is a mouthful. I don't know if that is exactly right, but you will get my meaning in a second when we go through some code live by line. You will remember your high school Geometry soon enough. For the real pros out there, you know there is much more to G-Code then that, but it is a good place to start thinking about it
G-codes
Are there other " Codes " ?
In a word..... yes. We will get to that in a moment. G-Code is also the name of any command in a CNC program that begins with the letter G, G-Codes generally tell the machine to perform an action. G-Codes can tell machines to move a certain distance in the X- Ais for example. Or, make a rapid move to another location. Or, move in an arcing fashion while milling. An on and on and on.

Here are some example of G-Codes
Remember these codes change to a certain degree between CAM Software packages and CNC Machine ManufacturersG00 Rapid positioning
G01 Linear interpolation
G02 CW circular interpolation
G03 CCW circular interpolation
G04 Dwell
G20 Programming in inches
G21 Programming in mm
G28 Return to home position
G40 Tool radius compensation off
G41 Tool radius compensation left
G42 Tool radius compensation right
G43 Tool offset compensation positive
G44 Tool offset compensation negative

Different of plasma

Different types of plasma cutting machine
Plasma cutting machines are available in a variety of species such as plasma torches, plasma torches, and plasma cutters. Compresssed air or nitrogen as cutting plasma cutting torches. The flares have a narrow kerf width together with a water-cooled electrod. Plasma torches with a high temperature gas system, which is produced by the gas by an electrical discharge. The plasma torch has two electrodes, the metal and tubular in nature. The electric arc between the positive and negative electrodes. Plasma cutters are specially designed for cutting steel and materials that conduct electricity
CNC plasma machine

- They provide high quality cuts and fast travel speeds.
- It is a low cost process for short runs as no physical tooling is required.
- A cost effective option for thick metal sheet.
- As compared to laser cutting can cut thicker sheets.
- It can be used to cut a wide variety of geometric shapes a long with 2D shapes that do not require too much precision

The cutting process

The process of cutting with plasma is an electical reaction, so that, unlike other techniques cutting, plasma cutting-cutting can only materials that conduct electricity. If a job file is started, the machine moves to forcibly open the first or cut position and the torch moves down in the direction of the material. At the end of the torch is a device, a so-called resistive sensor. Once the sensor makes ohmic contact with the surface of the material. It closes an electrical circuit, informing the machine that it has reached the surfaceof the material. The torch then lifts of the material on the amount forcibly open. The amount of open violence is higher than the cutting height to prevent pig iron from shooting directly back into the torch during the process forcibly open.
CNC Plasma cutting
Once the force open is completed, the torch moves on the reduced amount and begins to cut the amount optinum forcibly open, cut height, and all are feeding on the basis of consumer goods and materials be cut. On plasma cutting sophisticated system, all these parameters are automatically adjusted.



Once the cutting begins, the distance between the torch and the upper end of the materials is maintained by reading the voltage from the plasma arc, in a process known as automatic torch height. Generally sheet material is not totally flat, especially thin-gauge material. To ensure a quality cut. It is important, a constant distance between the torch and the surface. Maintaining a constant level requires a response ATHC system. On some systems, you are in power is a rate of 500 times per second, and the reading used to the 2-axis up or down. The result is a quality cut, that does not require user intervention.


Thursday, July 10, 2008

What is plasma cutting

What is Plasma cutting?
Plasma cutting is a process used to steel, aluminium and other metals with a powerful electric arc and compressed air. The compressed air blows the arc on the material to 20000 Fps so that only a smooth clean edge behind.

Plasma cutting was invented as a result of the attempt to develop a better welding process. Many improvements then led to this technology, what it is today. Plasma cutting offer the best combination of accurary, speed and affordability for the production of a wide variety of flat metal forms. You can cut much better, faster, more and auto-than oxygen-acetylene torches
Plasma cutting
How plasma cutting work?
Basic use plasma cutting electricity to superheat air in the plasma is then blown through the metal cutting. Plasma cutting require a compressed air and electricity network.

Plasma CNC cutting

CNC (computer numeric control) Plasma cutting has existed since 30 years, but only in the last ten years, it has become quite affordable for small business. Cutting plasma, which in turn is capable of almost surgical precision. It is the human hand to perform manual cutting of plasma, is responsible for roughness sometimes seen in the plasma pieces.

CNC Plasma cutting

Today 's CNC plasma cutting systems typically use the operator' s personal computer to create opportunities to reduce and control the cutter. The resulting shapes are soft it would be possible with a bandsaw, and can also be complicated curves, and cuts corners

Plasma Max

Are you tired of outsourcing your cutting needs?
Tired of waiting for your parts and paying a premium?

- Whether you are small shop, or a large production manufacturer, Plasma Max has a table to meet your needs.

- Whether you are cutting custom artwork, or industrial bracketry, Plasma Max machine will perform with precision and efficiency.

CNC Plasma Cutting Machine is the 3 - axis ( x,y,z ) cutting table controlled by PC computer or notebook, Hand plasma cutting torch added to the cutting table, like computer Numerical Control (CNC) G-Code generated by computer controls the motion of machine

CNC Plasma Cutting Machine
CNC Plasma Cutting Machine can easily reduce reduce complex and repetitive task, mass production of cutting waste

You can create your work using any Computer - Aided design software (CAD), such as AutoCAD Solidwork, etc., without writting the G-Code. Many tools are avilable to help you manage your work and it' s very easy to learn.

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