BOB3T-03: LPT Breakout Board for Plasma CNC

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BOB3T-03: LPT Breakout Board for Plasma CNC

$28.00

LPT breakout board for CNC plasma and routers: full Mach3 support, up to 5 axes with LED status, separate USB/external power to protect your PC, opto-isolated 0–10 V spindle output, 2 relays, 5 inputs for E-stop and limits, charge pump support, pin names printed on board. Made in Vietnam by Robot3T.

Category: CNC Cutting Controls

Description

5 axesMotor drivers

LPTMach3 compatible

0–10 VIsolated spindle output

2 relaysSpindle / charge pump

BOB3T-03 is an LPT (parallel port) breakout board that connects your PC to the motor drivers and I/O of a CNC plasma or milling machine. It fully supports Mach3 and other LPT-based CNC software, controls up to 5 axes, and shows the status of each axis on LEDs. Separate USB and external power supplies protect your PC, an opto-isolated 0–10 V output controls spindle speed through a frequency inverter, and two relay outputs switch the spindle or charge pump. Five inputs handle emergency stop, limits and tool touch-off, and every LPT pin name is printed on the board for quick, error-free wiring. Designed and built by Robot3T in Vietnam.

Request a quote WhatsApp +84 974 908 615

Typical applications

CNC plasma cutting tables: linking Mach3 to axis drivers, THC and torch control.
CNC routers and milling machines: spindle speed control via inverter.
DIY and retrofit CNC: an affordable, proven interface for PC-based machines.
Training: CNC wiring and control practice in schools and labs.

Why BOB3T-03

Protects your PC – separate USB and external power supplies.
Mach3 ready – works with Mach3 and other LPT-based software, with charge pump support.
Up to 5 axes – with LED status for each motor driver.
Spindle control – opto-isolated 0–10 V analog output for inverters, plus 2 relay outputs.
Safety inputs – 5 inputs for E-stop, limit switches and tool touch-off.
Easy wiring – all LPT pin names printed on the board.

Specifications

Model	BOB3T-03
PC interface	LPT (parallel port)
Software	Mach3 and other LPT-based software
Axes	Up to 5, with LED status
Power	USB + separate external supply

Analog output	0–10 V, opto-isolated (spindle speed)
Relay outputs	2 (spindle / charge pump)
Inputs	5 (E-stop, limits, tool touch-off…)
Charge pump	Supported
Origin	Robot3T, Vietnam

Product and wiring

Frequently asked questions

My PC has no parallel (LPT) port. Can I still use it?
You need a PC with an LPT port or a PCI/PCIe parallel port card supported by your CNC software. Contact us if you need advice on a USB or Ethernet motion controller instead.

Does it work with Robot3T THC and ohmic sensors?
Yes. It is commonly used together with our THC3T-02 height controllers and OS3T-01 ohmic sensor on Mach3 plasma machines.

Can it control spindle speed?
Yes. Connect the 0–10 V output to your inverter’s analog input and use a relay output for spindle on/off.

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

Building or upgrading a CNC plasma machine?

Tell us your machine, drivers and software. Our engineers will recommend a complete control set – breakout board, THC, sensors – and quote at no cost.

Request a quote