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bunGrbl-Breakout

This is a Kicad breakout board for an older Bungard CCD (ATC in this case, but it should work with manual change spindles) PCB mill. That's the version with the DB-25 and male/female DB-15's. It's intended to be used with a GRBL controller of some sort.

Model

At the moment I'm running my machine with a custom ATMega328P GRBL controller (Uno/Nano equivalent), DM542 stepper drivers, a JYQD-V8.5E bldc motor driver, and a Meanwell LRS 350-24 PSU. The spindle maxes out around 35k RPM with that motor driver, but otherwise everything works fine.

To release the pneumatic collet, the CHUCK signal should be pulled to GND by a switch.

X,Y,Z limit switches are wired NC. The tool length switch (TOOL) is NO, and I've split that off on my machine into a connector for performing the usual auto-leveling.

I've milled my board single sided as there's only a couple of jumpers needed.

Assembled

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Breakout for an older Bungard CCD ATC

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