Basic Information:
Printer Model: FLSun V400
MCU / Printerboard: Stock Nano V2.1
Host / SBC
klippy.log klippy.log (124.6 KB)
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Describe your issue:
Good evening, I’m trying to understand if I’m missing something in regards to how Klipper uses bed meshing. I have created a new bed mesh called V400. I’ve set the bed temperature to printing temperature and let it cook for 15 minutes. I’m using a 21x21 mesh with 5 samples at each point. I’m still getting terrible first layers, scraped beds, and failed prints due to levelling issues. Taking a look at the nozzle position output, I’m seeing a huge variance in actual nozzle height. In the screenshots below, as I understand it, the big number is where the GCode is telling the nozzle to be, and the small grey number is the actual nozzle height above the bed at that point.
At the middle of the bed, it’s as expected, with an actual reported height matching the GCode height:
Then as I move away from center, the actual reported height is all over the place (it yelled at me when I tried to include multiple screenshots, so the rest is text only):
At X=100.19, Y=99.75, Z=0.200, the actual reported height was 0.084
At X=100.19, Y=-100.25, Z=0.200, the actual reported height was 0.358
At X=-99.81, Y=-112.25, Z=0.200, the actual reported height was 0.131
If the bed mesh is importing correctly, shouldn’t it be adjusting to maintain a constant Z height above the bed? Am I misunderstanding something here? Any help would be appreciated.
Thanks!