THC Sensor Ver.3 is a device designed to enable monitoring of plasma torch arc voltage by the Audioms Automatika motion controller in order to realize THC function (Torch Height Control).
More closely, the role of the THC Sensor is to adapt arc voltage obtained from a plasma inverter and transfer it in safe and reliable way to the motion controller.
THC Sensor features galvanic isolation of the signal from plasma inverter and two input options are possible: with voltage divide ratio 1:50 or 1:1.
Using THC regulator integrated in Audioms Automatika motion controllers it is possible to realize torch height control on plasma cutting machines.
Audioms Automatika motion controller that supports THC Sensor are:
- ETH-MC(-BOX) motion controller,
- ETH-MCI motion controller,
- ISO-USB-BOX motion controller,
- USB-MC-INT motion controller and
- USB-MC motion controller with breakout board USB-UIO1.
Input circuit of THC Sensor is designed to suppress noise that is present during plasma cutting. Input circuit, output circuit, and also power supply circuit are all galvanically isolated one from each other. THC Sensor in Ver.3 introduce new filters added to prevent input circuit from high voltage peaks from different types of plasma inverters.
| SAFETY WARNINGS |
| WHEN PLASMA INVERTER IS OPERATING HIGH VOLTAGE LEVELS ARE PRESENT THAT ARE LETHAL FOR PEOPLE IF THEY COME INTO CONTACT WITH IT. |
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Installation of THC Sensor should be performed only by individuals trained to do the task. Before installation procedure and working with the equipment it is required to reed the user and installation manual. It is necessary to be completely sure of understanding possible dangers and also completely assured that installation can be performed in a safe manner. |
| More detail regarding safety precautions could be found in THC sensor's user manual. |
Image Gallery
http://www.audiohms.com/en/cnc-electronics-products/motion-controllers-and-breakout-boards/motion-controllers/thc-sensor-eng#sigProId7a9c6ee9ed
Technical specifications
| Parameter | Decription |
| Supply voltage | 8–24 VDC / 50mA |
| Divider ratio 1:50 | 1:50 ± 3 % (maximum input voltage 300 VDC) |
| Divider ratio 1:1 | 1:1 ± 2 % (maximum input voltage 10 VDC) |
| Analog output | 0–5 V |
| Output offset | < 50 mV |
| Instalation | to DIN35 rail |
| Dimensions | 104 mm x 90 mm x 60 mm |
| Mass | ≈ 150 g |
NOTE: These specifications are subject to change without prior notice
DOWNLOAD
| Document | Description |
 THC Sensor |
THC Sensor user manual |
| USB-MC THC operation |
Plasma torch height control using USB-MC motion controller USB-MC motion controller, in addition to support for external THC regulator, also has integrated THC regulator that is possible to utilize by connecting appropriate voltage sensor to the analog input of USB-MC controller. More details about this subject can be found in the document available for download using link bellow. |
VIDEO
Video shows Plasma Torch Height Control - THC realized with ISO-USB-BOX motion controller and THC Sensor.
Video shows Plasma Torch Height Control - THC realized with USB-MC motion controller, breakout board USB-UIO1 & THC Sensor.
Detection of ARC_OK signal by using USB-MC motion controller plugin is also presented.
