New SM2 owner here. Trying to go through the tuning tech calibration procedures. All his gcode generators ask what kind of ABL scheme is needed. I am assuming it is the “M420 S1” option?
If anyone else has tried his gcode I would like to know, I dont want to damage the machine we just got
Thank you Brent. Your post has been super helpful. I see you skipped the bed leveling print. What I am experiencing when runing TT’s bed leveling test is that the square at the center of the bed comes out nearly perfect, but the other 4 have major defects.
I am currently running the 5x5 auto bed leveling and heating the bed before leveling. Using the provided snapmaker calibration card.
Is this the ABL on the SM2 is no good or variance in the heated bed at the bed corners?
I think I have it sorted the best I am going to get it. I was experiencing ridging as if the nozzle was too close. The top left square is the worst.
I adjusted the Z offset to +.2mm and the center and bottom two squares are perfect and smooth. The top ones still have some ridges and globbing.
Not sure if the position of my sensor is off or what. I must have done the SM calibration procedure a dozen times up until now assuming it worked as advertised.
@brent113 Not sure if it’s same thing. Easy to check though if @eacmen wants to.
do calibration
center bed with jogging and lower head to z0 using the jog on the touchscreen
put the white card under the nozzle and hold it there
move head to each of the calibration points and see if pressure on card varies from point to point but is consistent at each point.
If it is not consistent at any point it may be wobble in the y rails.
If it is not consistent between points it might be the strange issue I am having - support have replicated and are investigating.
It wouldn’t surprise me adjusting the offset for each point manually as you suggest works fine to mitigate. That’s my next step if I end up waiting too long for support.
if its wobble in the y rails it can be spotted like in this video https://youtu.be/a4XPAdSCEP4
the fix is to a)get replacement rails [i advise people push for this] b)deconstruct the rails to adjust the bearings [this can be done if you are mechanically inclined, i am not, i destroyed one of my rails doing this, but snapmaker were awesome and replaced the rail] - but don’t adjust unless you can visibly see the wobble like that video.
and by not consistent at any point - what i mean is when you revist the identical XY coordinate the tension varies at that coordinate.