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Problem

The Z-Axis brake does not disengage or shows show unexpected behavior.

Debugging Steps

Perform a test to confirm if the solenoid is working:

1. Move the z-axis to the very bottom of the travel

2. Power off the machine

3. Unplug the z-brake cable

1. Disengage the brake manually (push the plunger back) while holding the weight of the z-stage

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1. Lower the z-stage to the hard stop

1. Unscrew the brake solenoid

1. Take off the solenoid and the plunger

1. , note the direction of the plunger tip

1. Reconnect the solenoid cable to the machine

1. Make sure the solenoid plunger is inserted into the solenoid

   • check if the spring is in place and working correctly

   • check if the brake solenoid can be moved without friction

1. Power on the machine and watch the solenoid

   • the solenoid should be pulled in when the machine is enabled

   • the solenoid should “jump out” when the machine is disabled (i.e. E-Stop pressed)

Hanno Mueller Are steps 1 - 5 needed? Can we just test the soleniod by unscrewing the brake and pressing the E-stop and seeing if the plunger jumps out?