Tiny Controls · Own design
TNC-M33 : 3 Axis CNC Controller
TNC-M33 is an offline 3-axis G-code CNC controller with a TNE-100H 100ppr handwheel encoder, differential pulse/direction outputs and 4 opto-isolated inputs.
Overview
The TNC-M33 is a three-axis G-code CNC controller with a handwheel for manual jogging — the TNE-100H, a 100 pulse-per-revolution encoder built into the front panel.
It reads standard G-code and runs the program itself from a USB thumb drive, with independent maximum velocity and acceleration settable per axis. Motor outputs are differential step and direction for a stepper or servo drive on each axis — differential signalling is what keeps the pulse train clean on a panel that also carries contactors and drive cables.
Four opto-isolated inputs and four open-collector outputs (able to drive 24 V relays) cover the machine I/O a typical retrofit needs — limits, an emergency stop, coolant or spindle switching — without a separate PLC. An inbuilt switch-mode supply runs directly from 220 V AC, so there is no separate transformer to wire in.
Where the TNC-D33 adds a handheld pendant and imports PCB drill files directly for a dedicated drilling application, the TNC-M33 is the general-purpose three-axis member of the range, for retrofitting a mill, router or similar machine that benefits from handwheel jogging during setup.
Designed and built by Tiny Controls in India.
Specifications
| Output type | Differential step/direction |
|---|---|
| Opto-isolated inputs | 4 |
| Open collector outputs | 4 24 V relay |
| Program storage | USB thumb drive |
Questions
How do I jog the machine manually during setup?
With the built-in handwheel — the TNE-100H, a 100 pulse-per-revolution encoder in the front panel.
Does it need a PC connected while a job is running?
No — it reads standard G-code from a USB thumb drive and runs the program itself.
I'm retrofitting an old mill — does this have enough I/O for limits and an e-stop without adding a PLC?
Yes — four opto-isolated inputs and four open-collector outputs cover the machine I/O a typical retrofit needs (limits, emergency stop, coolant or spindle switching) without a separate PLC.
How does this compare to your TNC-D33?
The TNC-D33 adds a handheld pendant and imports PCB drill files directly for a dedicated drilling application; this one is the general-purpose three-axis member of the range, for retrofitting a mill, router or similar machine.