Hey OnefinityCNC,
in the datasheet of a stepper driver that supports motors with brake, I can find the conditions in which one would want the brake to be activated:
Brake is fixed at:
- Alarm Signal active
- Enable Signal inactive
- Error in the power connection of the motor
- Error in the power connection of the brake
I ask myself if the solution presented here fulfils all four requirements. As the brake control is integrated inside the motor driver’s housing, this could be possible without altering the external wiring. Just to be sure. I ask this because all the users complaining about spindle dropping since the advent of Z-20 “heavy” slider with the steeper ball screw pitch wanted to have their spindle cease dropping not (only) on power down, but on initial check of the MASSO G3 Touch emergency button. And on possible motor power supply error and motor alarm surely too!
By the way, @Mrd, does your solution fulfil all four conditions?