Homing Z with probe

Murch

Hi,

im currently using g32 in my start gcode to do a bed leveling before every print. But this does take a long time and is not necessary as long as i don't move the bed.

i can store the calibration matrix in the eeprom with G32 S2 and load it with M320.

But what is missing is getting Z to a known value.

It seems that neither G28 Z nor G30 is setting Z to a probed level.

Unfortunately I don't have a free port to add a z max endstop

Am I missing something?

Repetier

Yes you miss some points. G32 S2 activates autolevling in eeprom so no need to activate it unless you deactivate it before.

Use homing order xy temperure then z and set z min endstop equal z probe pin. Then you can set homing position at a point where aftivating is possible and just home with G28. Requires dev versiion to work correctly.

erik23

Well - I would hope for another solution.

I have a newly set up Printer with three-Z-Motors for bed level correction, and it is almost perfekt. But I still want to home to zmin, because there is a micrometer screw to adjust bed Level Distance. I would like to make a pre-Z-Homing with the probe (because a badly tilted bed delivers wrong heights to z-Min-Endstop. Wich could result in a nozzle crash.)
The sequence I have in mind is: Where ever it is, lower the board with g1 z10. After that, homing xy, then going to the middle (xy). Homing Z Min with probe, going back 10 mm from switch point, doing the G32 stuff (disabling zmin Endstop, otherwise you have the Z-Min-Endstop firing before the probe hits - would be perfect), then homing to zmin with conventional Endstop.
Question is about the Homing with Z Probe with a magical Gcode sequence and still having a conventinal Zmin-Endstop with a micrometer screw available. I love that screw because it works fine, but I don't want to fix it to the printer head.