AHa-L1 automatic height controller specially for plasma cutting

Aha-L1 (Update to AHa-L2) is a new model of automatic height controller specially for plasma cutting. It’s all digital control and easy to operate with chea price.

Basic Functions

Initial location: torch height controller receives the signal of “torch down” from the CNC cutting controller, then the torch moves down, and then triggers the location switch, and then the torch moves down to the initial location height that is set, then torch height controller sends the signal of successful location.

Basic Parameters Diagram

Port Diagram

AHa-L2 Technical Parameters

★ power supply: DC24V, 1A, the max. fluctuation of the voltage is 10%

★ motor: 2-phase hybrid stepper motor, current output range 0.6~4.5A

★ motor power supply: DC24~40V, 4A, 10%

★ automatic height adjustment range: 3~30mm

★ automatic height adjustment speed: 3000mm/min (30 degree slope)

★ control precision: +/-0.5mm

★ working temperature: -10~50℃

★ voltage divider: 50:1, 1:1

Connection Diagram

Workflow Diagram

Automatic Operation:

Mode 1: use location finish feedback and arc strike success feedback of plasma power source, the torch height controller receives the “torch down” signal from the CNC cutting controller, the initial location works first, and after it ends, the “location finish” signal is sent to the CNC, and the CNC stops “torch down” and arc strikes, the CNC receives the “arc strike success” signal from plasma power source, and the cutting starts, after “THC auto delay”, CNC gives “auto” signal to THC, and THC starts to automatically adjust height according to the arc voltage change.

Mode 2: use location finish feedback and arc strike success feedback of torch height controller, the torch height controller receives the “torch down” signal from the CNC cutting controller, the initial location works first, and after it ends, the “location finish” signal is sent out to the CNC, and the CNC stops “torch down” and arc strikes, and the torch height controller checks the steady arc voltage signal, then it sends “arc strike success” signal to CNC, after “THC auto relay”, CNC gives “auto signal” to THC, and THC starts to automatically adjust height according to the arc voltage change.

Mode 3, not use location finish feedback and arc strike success feedback of torch height controller, some CNC controllers have no functions of “location finish feedback” and “arc strike success feedback, THC receives the “torch down” signal from CNC, and the initial location works when torch moves down, and “torch down” time is longer than “initial location” time,” and torch down ends, arc strikes, and cut. After “THC auto delay”, CNC gives “auto” signal to THC, and THC starts to automatically adjust height according to the arc voltage change.

In auto mode, “set arc” and “sensitivity” can be adjusted by the knob.

Manual operation: adjust the torch height by up/down buttons, initial location and arc strike test.

Cutting Samples