Stalling and calibration doesn't work (Farmbot Express)

[jsimmonds]

@phoque6 Did you notice this recent post ?

Z-Axis stalling

We have just updated the default settings for Express bots. I encourage you to try the new settings, which do have stall detection for the Z-axis disabled. While taking this action will remove the ability to detect stalls on that axis, it should allow reliable movements through the full range of the Z-axis going both up and down.