[HELP] 6 Axis B.O.B with spindle control

[EddyCurrent]

@GEOFFREY
Here's an extract from my breakout board manual

"The charge pump uses the 12 kHz signal from the parallel port generated by the CNC software to operate a logic circuit that gives an active low output. Any piece of machinery that uses powerful motors can be dangerous if controlled by a computer that can be in an unknown state while being powered up or in a software crash condition. Using the charge pump circuit to disable power to motors is a safety device in that it only operates when the software is running correctly and under user control. The charge pump circuit is also used to disable the output signals so even if your stepper boards do not have an enable pin they will be disabled automatically when the charge pump signal is not present."