Bed leveling with 2 Z motors
Last test for Today.
I increased the S Parameter to 10 in M671.
Disabled the Motors and put a screw under one side of Z.
G32 probes the 2 points. After the second probe, the bed made a correction in the correct way.
Then i probed the bed again via G29.
The height map looks like the one above...
@torro, if you send multiple G32 commands to level the 2 motors, what results do you get? It's not unusual to find that it under-corrects (that's why we provide the M671 F parameter); but you should find that the corrections get smaller each time.
It got better.
Now, there´s a little problem with the heightmap. the window is black. when i click on "top view", the height map is displayed from top. when i try to rotate it, the window get´s black again. when i click the "reload heightmap" button, there is a message "file not found" in the black heightmap window.
disabling/loading the heightmap via compensation menu didn´t help.
Did you run G29 before viewing the height map? Levelling the bed from side to side using independent leadscrews will not generate one.
I recommend that after running G32 to level the bed and before running G29, you do a single G30 probe at bed centre to re-establish the Z=0 position. You can do this at the end of bed.g.
Yes, i run G29 to generate a heightmap.
at the moment, i do only a G32, no bed compensation.
this leveling thing drives me crazy. it worked a few times. now, after mutliple G32, the nozzle is on one side of the bed too close, at the other side too far away (about 0,2mm)
has anyone experience with the IR probe and a "pertinax" build plate?
i don´t know, how pertinax is called in english, the translator calls it "synthetic resin bonded paper" or Paxoline/Bakelite.
this stuff is great, but i think the probe has a problem with it.
should the trigger height always be the same, no matter where i probe? (no compensation active)
i have some differences on both sides. multiple probes at the same spot give always the exact same trigger height.
i tested it with all lights in the room off. no difference.
I suggest you measure the trigger height at different places on the bed to check that is it consistent enough.
Do not use the 2.03beta1 firmware with G32 leadscrew bed levelling, it doesn't work properly.
No, it's not 2.03.
Should the trigger height be the same, regardless where i measure?
I'll try to increase the M671 F Parameter.
Is there a Limit? Or a recommendation?
It's the last Chance for my leveling Story...
going back to a normal Z endstop or maybe two
Ok, then i can forget the leveling. There are big differences. About 0.2mm when i Check the trigger height at different spots on the bed.
I'm going to independent Z motors with 2 endstops.
Just reading here and the guide on dozuki.
New thread with a lot of questions will follow soon
Gear last edited by
this seems more like issue you have to resolve because if your probe is malfunctioning it's better to just ditch it and get something else to probe.