Torch Height Controller With Up/Down Output

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Torch Height Controller With Up/Down Output

$152.00

Compact arc-voltage torch height controller for CNC plasma cutting with built-in 1:50 voltage divider and noise filter – works with plasma cutters without a divided output. Simple UP, DOWN and ARC OK outputs, auto ARC OK detection and calibration, smooth motion, online height adjustment and Mach3 integration. Made in Vietnam by Robot3T.

Category: CNC Cutting Controls Tags: Bộ điều khiển độ cao đầu cắt plasma, Compact THC

Description

Arc voltageHeight sensing

Up/DownSimple 3-wire output

AutoARC OK & calibration

1:50Built-in divider

THC3T-02 is a compact torch height controller for CNC plasma cutting, with a built-in 1:50 voltage divider so it works with plasma cutters that have no divided arc voltage output. It reads the arc voltage while the torch is cutting and automatically raises or lowers the torch to keep a constant distance to the plate, so cut quality stays consistent even when the sheet is warped or the cutting bed is not perfectly flat. Signal-processing algorithms stabilize the voltage reading, and a smooth-motion algorithm prevents jerky Z movement. Connection is as simple as it gets: just three outputs – UP, DOWN and ARC OK – wired to your CNC controller, which then moves the Z axis. It detects ARC OK automatically, self-calibrates to the arc voltage of your plasma cutter, and integrates with Mach3 software. Designed and built by Robot3T in Vietnam.

Request a quote WhatsApp +84 974 908 615

Typical applications

CNC plasma cutting tables: gantry and table machines running Mach3.
Warped or uneven sheet: keeps torch height constant over bends and waves.
Machine builders: a compact, cost-effective THC for new plasma machines.
Retrofits: adding automatic height control to existing machines.

Why THC3T-02

Better cut quality – constant torch height means consistent kerf, bevel and less dross.
Longer consumable life – avoids torch dives and crashes caused by uneven plates.
Simple wiring – only three outputs: UP, DOWN and ARC OK; ideal for retrofitting existing machines.
No extra divider needed – integrated 1:50 divider takes the raw arc voltage directly.
Stable reading – signal processing filters arc voltage noise; smooth-motion algorithm for gentle Z moves.
Easy setup – automatic ARC OK detection and arc voltage calibration; adjust height on the fly with a potentiometer.
Convenient – jog the Z axis from software in idle mode.

Specifications

Model	THC3T-02 (Up/Down, integrated divider)
Plasma source	Any plasma cutter; auto-calibrates arc voltage
Voltage divider	Integrated 1:50, with noise filtering
Height sensing	Arc voltage, with signal-processing filter
Outputs	UP, DOWN, ARC OK to CNC controller

ARC OK	Automatic detection
Height adjustment	Online, by potentiometer
Idle mode	Z jog from software
CNC software	Mach3
Origin	Robot3T, Vietnam

Product, diagrams and setup

Block diagram

Connection diagram

Mach3 configuration

Up/Down or Step/Dir?

Feature	Up/Down	Step/Dir
Output to machine	UP, DOWN, ARC OK signals to the CNC	Step/Dir directly to the Z driver
Wiring	Simplest – 3 outputs	Connects between CNC and Z driver
Z response	Through the CNC controller	Direct – faster and more precise
Best for	Easy retrofits, standard Mach3 THC setup	Highest performance on new machines

Both versions: arc voltage sensing, auto ARC OK, auto calibration, smooth motion, Mach3 integration.

Documentation

Download user manual (Up/Down)

See it in action

Constant torch height, clean cuts

Arc voltage keeps the torch at the right height.
Simple UP / DOWN / ARC OK wiring.
Works with Mach3 out of the box.

Ask an engineer

Frequently asked questions

How is this different from the Hypertherm version?
This version has the 1:50 voltage divider and noise filter built in, so it reads the raw arc voltage directly from plasma cutters without a divided output. The Hypertherm version uses the divided signal provided by Hypertherm sources. Tell us your plasma model and we will recommend the right one.

Can I use it with software other than Mach3?
This Up/Down version is made for Mach3. For other CNC software or controllers, contact us and we will recommend a suitable THC version.

Up/Down or Step/Dir – which should I choose?
Choose Up/Down for the simplest wiring and easy retrofits. Choose the Step/Dir version when you want the THC to drive the Z motor directly for the fastest response.

Do you ship outside Vietnam?
Yes. Contact sales@robot3t.com for a quote including shipping to your country.