I’m going to provide as much info as possible as to what I’ve been doing which may mean some superfluous context but I hope it helps someone pick up what might be going wrong.
I’ ve done some laser engraving OK
Moved on to 3d printing yesterday. Calibrated OK and started a small print.
This morning, the print finished but it twice went off on the x+ and y+ towards the end.
Tried the same print again. Came back to realise that it wasn’t extruding filament and had just been looping over the same pattern but not extruding.
Fixed the extruder.
Re-generated to the G-code to print in the corner, not the centre, which already had trails from the previous prints.
The head was printing way too far off the bed and just pissing plastic everywhere.
Tried to recalibrate, but the calibration would start halfway up the Y axis and the second row would be off the top of the Y axis and the calibration would skip to the last (calibration card) step.
Tried setting the calibration number of calibration points to the max. Same problem.
Still not calibrating right…but clearly the preferences didn’t fully reset either because the number of calibration points was still set to max.
Noticed there was a new firmware available ( I only updated yesterday…so is a new one just out?)
Tried calibration again…it seemed to work this time.
Loaded up a new print. Got a combination of gouging my bed and draging filament. The bed is really gouged now.
Flipped the bed over and tried a completely manual calibration.
Points in the bottom left of the machine (low X and Y values) will not allow me to complete the Z calibration…it decides I’ve gone ‘down’ far enough and skips to the next one. The rest of the points seemed ok.
So I’ve called it there. I’ve already got one screwed side of the print bed which I am far from happy about and don’t really want to see the other side get ruined.
There seems to be some disparity between the baseplate, the bed, and the toolhead linear module at different points. Not really sure how I would adjust these though?
Pretty frustrated. Hoping someone can point me in the right direction.
For me this sounds like a case for Snapmaker support. It seems you do everything right, but the printer somehow refuses to take the calibration.
Tipp from my side: The calibration happens when the printer is cold. When it heats up, everything expands a bit, so I found my first print was pressing a bit too hard into the bed for my taste, making the plastic stick too hard and dificult to remove, and I immediatly corrected Z-Offset while printing. As a result I´d recommend to calibrate 0.05 - 0.1 mm higher than the Snapmaker procedure suggests. I level so that the calibration card feels clear friction from the nozzle, but still does not bend/bulge when pushed.
How do you correct z-offset mid print? I suppose that only would help when it is too low. From what I’ve seen if it doesn’t realise it’s too high, it will think it’s lower and not let you lower ‘into the bed’?
I agree with @Hauke I think it’s a good idea to wait for an answer from support. That said my first thought is your bed leveling sensor is not adjusted properly. Here is a topic about it https://forum.snapmaker.com/t/adjusting-the-probe/6420
Which firmware do you run?
Which software did you use to slice?
May you share the start gcode of it with us?
There was a firmware bug long time ago, if the machine was not homed manually after bed calibration it could cause print head crashing into the bed.
Do you remember if the machine homes itself after calibration?
Did you adjust the last point by hand and hit the save button?
Have you reattached your print head?
For compilation, the nuts of the skeleton frame under the heated bed are facing downwards.
Thanks all. I am in contact with support. Hopefully they can provide an answer. If it is user error at my end I will definitely share my embarrassment here so others can learn.
xchrisd - I am pretty sure it has homed itself each time. I have pressed the last point and saved. I have reattached the print head a few times, and yep the nuts are down. Hopefully we’ll figure it out soon.
