Z axis does not work after calibration

[berainlb (PY)]

Read through this Topic as it has very similar symptoms. @ednisley has some very specific guidance so I’d suggest reading those areas carefully.

Z Axis Stepper Calibration

I’ve upgraded to stepper motor control of z axis to allow bed height control from Lightburn. I am now able to rise and lower the bed from the controller (RDC6445G-EC), however I can’t calibrate steps to match actual travel. I got the bed to move through trial and error at step length of 1.77. Then I measured actual travel vs displayed travel and used the “calculate steps” function on the controller to get actual step length (.067240). Problem is, the bed won’t budge (motor stalls/ squeals) a…