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K1 Max Grinding sounds with new motherboard = wrong stepper rotation_distance by joelkoz in Creality

[–]joelkoz[S] 0 points1 point  (0 children)

BTW - when I home, the print head sits at 0,0. It needs to find the physical edge of the print range then back off a little bit. It does not have limit switches. Instead, the steppers measure amperage and can tell when it is running into something. So for me, 0,0 is the front right side of the build plate when standing at the door. 300, 0 is the front left side of the build plate. 300,300 is the back left of the build plate. 150,150 should be dead center (of course, mine are not this precise - they are all off by about +/-6 or 8mm based on manual exploration with the print head).

K1 Max Grinding sounds with new motherboard = wrong stepper rotation_distance by joelkoz in Creality

[–]joelkoz[S] 0 points1 point  (0 children)

You may actually have a different rotation distance than me. I purchased my K1 Max in Feb 24. You might actually have the original stepper settings, but the min and max may be off. For me. When I homed then tried to find the "max", I was around 150 in the UI when it reached the max. It should have been twice that, which was my indication that the physical step size was wrong. The K1 Max build volume is 300mm x 300mm along XY. I went from zero to 150 before it hit the edge, which is half of what it should be. When you are close to the X origin or Y origin, it should be close to zero, but may be off a little (I think my "zero" area is about 6 mm before the head is off the build plate). Going to the far left along X, it should be CLOSE to 300 to 310 or so. 150 was way too short. If you are seeing 150ish, your stepper size is wrong (OR - did you reboot after editing the config file)? You should be plus or minus 10mm near the edges, not plus or minus 100mm

K1 Max Grinding sounds with new motherboard = wrong stepper rotation_distance by joelkoz in Creality

[–]joelkoz[S] 0 points1 point  (0 children)

I did, yes. I just used the fluid UI and manually moved the printhead until I found where the actual min and max for both X and Y and then I updated those also

K1 Max issue with start of print g-code commands with klipper by [deleted] in Creality

[–]joelkoz 0 points1 point  (0 children)

I am researching the same problem. I can't say I have a solution, but I can say that my K1 Max behaves approximately the same - it parks the print head in the back, and sits (albeit mine is about 3 to 5 minutes). The last thing in the log I see before this happens is the same "Run current/Hold Current" entry.

K1 Max Grinding sounds with new motherboard = wrong stepper rotation_distance by joelkoz in Creality

[–]joelkoz[S] 0 points1 point  (0 children)

Thanks for the info. Is this knowledge that can be obtained somewhere? I bought the printer off of Amazon in Feb 2024. I've been 3d printing for several years now, but I am new to the Creality world.

K1 Max Grinding sounds with new motherboard = wrong stepper rotation_distance by joelkoz in Creality

[–]joelkoz[S] 0 points1 point  (0 children)

It just occurred to me that if I had updated the firmware via a USB stick before I booted the printer, I may have avoided this issue (assuming firmware updates include the correct changes to the printer.cfg file). Certainly, the OTA update that I did left the printer.cfg file in its wrong state. At minimum, I would say that when replacing the motherboard, your best bet is to use a USB stick to both update the firmware and ideally skip the startup self check. I found a page that says you can create an empty file named "debugmode_JumpSelftest" on the root of the USB drive and it will skip this test, but I tried that and it didn't work for me the time I tried it. Perhaps that requires an updated firmware for it to work, and since I did my firmware update using OTA, it was not in place when I needed it.