Printer Model: HevORT DIY Printer
MCU / Printerboard: BTT Manta M8P
Host / SBC: BTT CB1
klippy.log
klippy.log (2.7 MB)
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Hi,
i recently changed my printhead and with it the probe from a bltouch to a quickdraw probe. For the probe i use these macros.
When i use the z-tilt-adjust command, the bed adjusts in a way, that the rear part is always about 0,3mm higher, than the front. The z-height is 0 in the middle. From left to right it is leveled correctly. I check this by using a thin paper and adjusting the z-height manually at 9 points in a 3x3 pattern. A bed mesh, created after tilt-adjust shows a different heightmap, that does not fit the reality. The printhead and probe mounting seem rigid to me. At least it takes a lot of force to achieve a visible change in the probe’s position. (rotating the printhead around the x-axis’ mgn9-rail) I had the idea, that the cables, CPAP tube, water-cooling and bowden tubes force this rotation and produce a systematic error, changing the effetive probe offset, depending on the Y-Position. But then, the mesh should not differ that much and the error should not be that reproducible, when taking the weight from the tubes away by hand. I did this probably 5-7 times and the 3x3 manual measurement always stayed the same.
I dont do tilt-adjust on every startup (i maybe should, i know) so i cannot say, when exactly this started. I didnt print any larger parts with this hotend, so it most like is related to this change, but after all, i’m not sure.
During the klippy log i did the following:
-Mess up bed leveling manually
-Home all axes
-do a z-tilt
-repeat z-tilt
-create a bed-mesh (i forgot to attach the probe once, macro misses this)
Thank you for any ideas/help, i’m at my wits’ end…