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Topics - Bronk

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Mach4 General Discussion / 3D printing and fan speed control
« on: December 31, 2016, 08:49:02 PM »
I have added 3D print head (Micron EME Cobra) to my router.
My setup was originally for inches.
I had problems with G21 swiitching to mm scaling on the A axis which is the feed for the printer filament. It always seemed to stay in inch mode. So I reconfigured for mm and reset all of the motor settings appropriately.
It now prints. However I am fighting infill sagging and top layer issues and suspect this is due to not having cooling fans for the print. I have a couple of tiny fans on on order.
However I was digging through the docs and I cant see how to set up another PWM output which would be ideal for fan speed. I use the existing PWM spindle output for the VFD for the router.
Has anyone else done something like this?  I could see using 2 outputs to get 4 speeds (which might be enough) but then I have to do more custom coding to make this work.

Is there any documentation on using the 3D printer config mode vs Mill mode? Currently I am using Mill.

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