Laser head not homing and get position not reading 0

Community Laser Talk
4

That’s the default value when homing hasn’t succeeded; the X and Y axes default to something like 10 000 mm.

Have you:

  • Enabled Z axis homing in the Edit → Machine Settings → Vendor Settings list
  • Sorted out the homing direction & keypad direction polarity / inversions
  • Verified that the switch operates correctly
  • … and appears active in the diagnostic panel when you manually trigger it

With that in mind, however, Ruida controllers apparently have a deeper configuration level inaccessible to LightBurn. My machine has an autofocus probe triggered by a key on the console, which is entirely independent of the config settings I mentioned. Bonus: it’s on the U axis, rather than the Z axis.

No matter what the settings, it doesn’t want to home the U axis at power-on. This is a Good Thing, because the autofocus probe generally wouldn’t contact anything with the head at a random position on the platform.

Because the controllers are intended for lasers, rather than CNC machines, it may not be possible to force the Z (or U) axis to home automatically during startup.