LGK Plasma Cutter

Details

  Technical Details

^{Pictures, dimensions,table data and technical drawings of this product are made with reasonable care and liability is excluded for the accuracy and correctness of this data.}

 * This is current used/connected to electricity net / please check current in your electricity net to be sure that you have enough current

  Features

LGK-63/100/120/160/200/300/400IGBT   Inverter air plasma cutting machine is a new generation of plasma cutters. It has good characteristics as following:

      Main Features:

• Soft switch technology with stable cutting current
• High duty cycle for heavy industry use
• Cutting current up-slope technology to reduce loss of wearing parts
• Small volume and light weight which is easy to install on the table of CNC cutting machine
• Use compressed air as protection to save cost
• Accurate cutting current preset and stepless adjust
• Gas check function for easy adjust the air pressure

• This cutting machine adopts IGBT Inverter technology which has high reliability and efficiency. It is light weight.
• Pre-set current function. Step-less adjustable cutting current, suitable for cutting various thickness work-piece. To ensure cutting quality and save energy, low current is applied to cut thin plate, and high current is applied to cut thick plate.
• External and dynamic characteristics cutter are significantly better than leakage-reactance typed cutter. High success rate in striking arc. Stable cutting current.Good arc stiffness. Clean and smooth incision. Excellent technology performance.
• It has the function of ascending current slowly, which can effectively extend the work life of wearing parts and cutting torch.
• Quite suitable for CNC automatic cutting and has all signal output which is required by CNC control.
• The cutting current is very stable and it will not be influenced by grid voltage fluctuation.
• 100% duty cycle (except LGK-63IGBT / 60%). It can work continuously under max current.
• Have over/under voltage and phase missing protection function.

  Usage

It is suitable for cutting most of metal materials like low carbon steel, alloy steel and non-ferrous metal and is widely applied in the manufacturing of boiler pressure container, chemical container, industrial power station construction, metallurgy, aerospace industry, automobiles, building and so on.

  Work Environment Requirements

Welding performance may not meet technique standards without the following conditions.Welding performance may not meet technique standards without the following conditions.

• It should be placed with small dust, no corrosive gases and no flammable and explosive materials. Avoid vertical sunshine and rain
• Air relative humidity is no more than 90% at 20℃ and no more than 50% at 40℃
• When using air cooling torch, the ambient temperature should be from -10℃ to 40℃.
• It should avoid metal foreign bodies entering into the cutting power.
• Cutting power should be 30cm away from the wall or other sealed-in objects. The distance between two sets should be above 30cm.
• The operation height should be less than 1000m.

  Plasma Torch

CNC Plasma cutting torch: Used by machine or robotic cutting		Handheld Plasma cutting torch: Used for manual cutting by hand

LGK Plasma Cutter machine is optimized for machine / robotic plasma cutting but can also be used for manual cutting. If you order a CNC portable plasma cutter from our shop with the LGK plasma cutter, then you will get CNC machine cutting torch without additional charge.

 NOTE:   When ordering LGK plasma cutter, please specify which type of plasma torch you want to be delivered with your plasma cutter! Usually it is delivered with a manual cutting torch. If you ordered a portable CNC cutter , then in this case the appropriate machine CNC torch comes by default with no extra charge.

  Working Principles 

The control circuit of this cutting machine adopts advanced electronic part IGBT as the main inverter switch component. Three-phase AC power is converted to 20KHz high-frequency DC current after being rectified by three phase rectifier. Then under the function of IGBT inverter the DC current is inverted to AC high frequency current, which is inverted to DC current after experiencing voltage reduction in high frequency transformer, current rectifying in fast recovery diode. This DC current is filtered through reactor, and the output cutting current is obtained. Control circuit can control output current by controlling driven pulse width. The real time cutting current, which is obtained through current sensor connected to output terminal in series, is used as negative feedback control signal. After comparing with current adjusting signal, the negative control signal is sent to PWM adjusting integrated circuit, then a controlled driving pulse is output to control IGBT. Thereby a constant output current can be maintained, and a steep dropping & constant current external characteristic is obtained. Striking arc adopts high-frequency striking model. The main circuit refers to appendix figure, and principle diagram of control circuit is shown as below figure.