So I think I may have figured out why my prints come out all wonky… When I do an auto level calibration the head just presses the bed down until it starts rumbling and then it goes to home with “Something went wrong”
I’m afraid the whole bottomplate/spider web structure is now warped due to this happening and the symptoms before. It didn’t do this before but I can’t auto level anymore due to this issue… Prints just won’t stick on one side of the bed if the other side is perfectly adhering. So I seem to have more than 0.5mm of a deflection for sure.
Other than contacting support@snapmaker.com and requesting a replacement I would first take off the bottom spider plate, lay it on a hard, level floor then put a heavy weight on it so that the whole plate is covered equally which should straighten it without causing any damage.
Definitely do the sensor test, there’s a (tiny) LED that should come on when it senses metal. If you are seeing that then I think the next issue is the sensor is adjusted too high, it should be only about 1mm higher than the print nozzle tip. (Don’t quote me on that distance - use the article.Link following is to the “F” model but it’s jsut where I found it, should be the same: https://support.snapmaker.com/hc/en-us/articles/4432845583127-What-should-I-do-if-the-3D-Printing-Module-pushes-into-the-Print-Sheet- …the link also shows the LED by the way. )
The final calibration point in the center you lower manually (be sure to drop the step size you’re lowering as you get closer) until the paper test works out that you can pull but not push back (it loops up). That’s when you set the ‘absolute’ starting height that the rest of the sensor-based ‘map’ is applied to. But sounds like you need to get a good sensor reading, first…
First of all thank you for the quick and detailed replies
Secondly, sorry for the late reply got a lot on my plate the past days.
But I did manage to do all of the above, seeing if the spider rack had warped, doesn’t seem to be the case, and while trying the sensor I discovered I had a failed print some time ago. I did clean the outside back then but apparently it had managed to wedge filament in between the heatsink and nozzle so the nozzle was about 3mm lower than it should be. After this discovery I replaced the heating element/nozzle with a spare I had and low and behold it auto calibrates again
Sadly it’s not completely over yet, for some reason it still pushes down on the bed in the back right and back middle probes, not in any other spots.
Anyone has any insights in what can cause just those spots to be pressed down by about 0.5-1mm?
I reattached the bed and even tried the auto leveling without the magnetic sheet and just a piece of foam to protect the heated bed with the same issue…
Your sensor may be a tad high, you should check page 20 of the troubleshooting guide (download page linked below) and see if that helps.
Definitely always do the calibration with the magnetic sheet on, the sensor works by sensing the metal in the sheet and so it won’t work if the sheet isn’t there.
