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it's 20000 steps per unit. pulled this out of my old mach3 xml config file

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My next issue on this industrial hobbies uc300 upgrade...
(I'll do a write-up here...

Does anyone know where I can get schematics and detailed specs for IH (Charter Oak) CNC mill controllers made around 2009/2010? Got it mostly figured out by now but I would like to get the specs of...

Thanks- the Rong Fu part is just the body and mechanical stuff. IH built the controller and CNC retrofit and that's what I'm interested in

Whoever moved this to benchtop machines, it's really not a benchtop machine. I pity the bench that has a 1000 lb tool on it.

Greetings. I have an IH CNC vertial mill with 4th axis, VFD motor and coolant. Obviously they've been out of business for a while.

I'm in process of updating the motion controller to UC300 with...

I'm having an unusual problem with Mach3 (maybe) on my mill and wondering if anyone else has experienced this.
When I stop program during an arc move, sometimes I lose my zero on the x and/or y axis...