Question about bed mesh
I've been having issues with z offset not consistent across the bed surface. I homed the bed, ran tilt, rehomed z, ran a bed_mesh_calibrate (even did a 16x17 grid). Then saved it to a profile called cold_bed, and then did a save config. Then after the restart, homed, z tilt, homed z, and then loaded the profile cold_bed. The z offset is correct in the middle of the bed doing a paper test at z = 0, but everywhere else it is wrong . Perhaps bed mesh doesn't compensate unless a print is running?
9 Replies
I really suspect something is not right with bed_mesh as it relates to Z offset. Running a print right now that works fine at bed center but I have to lower the nozzle into the bed by 0.15mm in another location. But I can see the z axis moving to compensate for the bed surface. And I use a dual rail for the x axis so heat deformation from the gantry is nill. This used to work a few weeks ago without adjusting z offset anywhere on the bed and now it doesn't. I did have a problem with my hotend coming loose but that is repaired and is no longer a factor. Is there a bug in bed_mesh?
Perhaps bed mesh doesn't compensate unless a print is running?If it's loaded, the compensation is active.
It almost seems like the mesh is inverted. It's that far off. Very strange
If you suspect bugs in bed_mesh, go report it on https://klipper.discourse.group/
It's infinitely more likely that you're having mechanical issues though.
I agree, but it's printing really well once I babysit the offset at the beginning of the print
RatOS doesn't change klipper's bed_mesh implementation, so theres nothing i can do about it if you believe it to be buggy. You would have to report a bug to the klipper team.
Ok just wanted to get your take on it. It's very strange.
My take is: it's mechanical.
Usually it's loose couplers, loose nozzle, loose something.
Thanks will go over everything