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@bearer said in Duet 2 controlling a cnc spindle / VFD via pwm:
Could he use a 5V fan output if hes got one spare?
Yes, or a spare heater output.
I think user @biscuitlad has gone through the process. Perhaps they have a working config to share.
You can also search the forum for K8400. There have been a few discussions. Here's one: https://forum.duet3d.com/topic/4145/using-the-reprapfirmware-configuration-tool
