I just got my A250 Snapmaker 2.0 about 2 weeks ago. Set it up and ran a couple of prints which came out great. However, after running fine for a couple of days, the printer wouldn’t calibrate correctly and the print head was too low, kept on digging into the printing pad and dragging it around. Not so deep that it created gouges but it would snag it and move it.
Read the forums here and found the various articles about problems with the automatic bed leveling. Did the reset with the console and M502, M500, M501. Started doing a manual calibration with a 5x5 matrix when I got to the 9th mark I was off the table by almost exactly 10mm. Not sure how to move forward now.
I have also updated to the latest firmware and Luban software.
What should I be doing now? I have no experience with 3d printers, though I have software and robotic experience. I know what is wrong but I don’t know the correct way to fix it.
If the 9th calibration point is off, you have something false assembled.- Check the heatedbed position again.
May you make a photo at this point, please?
I will double check that, but I did successfully run several prints when it just stop calibrating correctly. Mainly being too low and pushing the bed around.
When it stopped calibrating, is when I updated the firmware, and it was after the firmware update that it started to go off the back of the print area. I started off by doing the M502, 500, 501 with the console turned off the automatic calibration and then I double checked the probe/proximity sensor. Made sure it lit up and was the correct distance from the bed.
After I did all this is when I tried to do the 5x5 calibration and the head would go off the back.
I was reading last night in another forum about there being issues with the 5x5 calibration and A250s being broken with some of the firmware updates. I am going to try just using the 3x3 and maybe going back a firmware release.
I really like the mechanical build of the Snapmaker, but the software has something to be desired.
I am pretty sure I assembled it correctly. I went over the instructions several times. These pictures were taken with me trying the 3x3 grid calibration.
Are the y-axis supposed to be hanging off the front of the base?
I have an A350 and they are centered on the base in two impressions.
Don’t know about the 250.
@xchrisd Yes, I updated from the forum to Snapmaker2_V1.10.1.bin. The proximity sensor doesn’t light on the 5th position, but then again it is off the bed.
That thing 2sided taped to the side of the print head is a dial test indicator, I was planning on testing levelness at the same time as calibration, and I did run the calibration right after the pictures without the test indicator, just to be sure it isn’t part of the problem.
@sdj544. As far as I know that is the place to screw it in. First of all it is the only spot on the bed that has the right kind of screw holes that have the correct alignment, and secondly it is the placement as indicated by the instructions
What I am not so sure of is the placement of the rails. I think it is correct because that is the way the instructions indicated, but I don’t know if home is supposed to be full forward or full back for the Y axis.
That is what it looks like when everything is centered. That is also what it looked like before I put the Z axis towers on.
However, when Z axis homes it goes to the top position, when X axis homes it goes to the far left and when Y axis homes it goes far forward. At least it does on my machine.
