Suspected warped bed because of a printhead crash.
I recently crashed the print head crash to the center of the bed, now I'm worrying that I might have accidentally warped it even though the coupler disengaged when the crash happened. .
How likely is the bed warping happen when the bed is 80 deg C hot?
18 Replies
helpful-purple•2y ago
Correct me if i am wrong, but that's a 0.1mm deviation across the bed? that's not a lot, what printer size is it?
vicious-gold•2y ago
This is a V-minion. So 0.1mm is good?
My worry is on the "sharp" peak at the left screw of the bed.
really! that's not a warp. Consider yourself lucky you are in that range!
vicious-gold•2y ago
Okay, I have this one before. No sharp peaks.
helpful-purple•2y ago
yeah, i have 1mm deviation, though that is on a 500 
helpful-purple•2y ago
make sure you have the same settings set when comparing visually to one another
helpful-purple•2y ago
as we're talking about such tiny amounts of distance, the visual representation can exaggerate
vicious-gold•2y ago
Ok, sorry bout that. I can't find the other screenshots that I made before. But I have that one turned on a bunch of different scale level.
So nothing to worry about this bed mesh?
helpful-purple•2y ago
i would not worry about it no, though, you can try different things and see if you can change it, such as adjusting the frame and rails etc, but keep in mind that's chasing perfection
vicious-gold•2y ago
Yeah, I'd rather spend that time learning other things about 3D printing.
Thanks @nordern and @ptegler
helpful-purple•2y ago
np
the 'balance point' of what is a 'tolerable' bed mesh non planner measurement is the speed at which your bed Z axis can move, and how fast you are trying to move the XY axis. Klipper will move the Z while printing to compensate fore the mesh non-flat conformity. If Z can't keep up with XY.... then you see artifacts etc. clear as mud right? 🙂
vicious-gold•2y ago
I understand it. But, does the Z compensation speed follow when you adjust the travel speed?
It attempts to. But think about it...can your bed move as fast as your print head?
The smaller the bed mesh deviation the less the bed has to move to self correct. Hence targeting the smallest feasible variation possible. If you have a .1mm mesh variance over say a 100mm square print area. if the carriage is moving at 100mm/s the bed only has to move < 1mm/s ...or there about
helpful-purple•2y ago
mostly when my bed is correcting for the deviation, it's 1 single step at a time
it genuinely sounds like something is creaking because of it
I actually have little blue tape 'flags' wrapped around the bases of my Z lead screws.... makes it easy to see the rotation as the printhead traverses the print bed.
yes...very small movements but observable
helpful-purple•2y ago
now that is a simple, but good idea that i will copy right now
Thought at one time it would help me see the z-tilt was in alignment as all the flage would point the same direction when level. Ha! nope! z-tilt adjustments throw that out the window..