VHC-300 Arc Voltage Height Controller is an automatic height control device for CNC cutting machines, suitable for most imported or domestic plasma torches with constant current characteristics. It utilizes the basic constant current characteristics of the plasma power source to detect the voltage changes of the plasma arc and achieve height control of the plasma torch.
The VHC-300 arc height controller provides automatic height control for plasma torches on CNC cutting machines. It detects arc voltage changes to adjust torch height and includes manual and automatic operation modes.
The manual details technical specifications, wiring diagrams, panel functions, initial positioning methods (protective‑hat and proximity‑switch), brake adjustment, and fault troubleshooting, helping users install and maintain the device safely. This manual is written in Chinese.
| Working voltage | AC24V ±10 %, 50~60 Hz |
|---|---|
| Lift motor | DC24V permanent‑magnet DC motor |
| Drive method | PWM (pulse‑width modulation) speed control |
| Output current | 1~4 A (max 6 A) |
| Output power | max 150 W |
| Operating temperature | -10 °C ~ 60 °C |
| Dimensions (L×W×H) | 300 mm × 240 mm × 65 mm |
| Arc voltage range | 70 V ~ 225 V |
| Control accuracy | ±1 V |
It provides automatic height control for plasma torches on CNC cutting machines with constant‑current plasma sources.
Protective‑hat (contact) positioning and proximity‑switch positioning, either alone or both together.
The Arc on indicator lamp lights when the arc‑control signal is sent to the plasma source.