I’ve been having a problem that is preventing my 3D prints from completing successfully. It seems to have started after I switched back to 3D printing from using the CNC module, but I don’t think it is related.
I’m trying to print some simple book end pieces. The design is trivial - basically a 3/16" thick 4" x 6" rectangle, with a thicker section on one end to fit into a desk organizer I am making. On my first attempts to print it, the first layer didn’t adhere well, so I increased the bed temperature by 5C. That seemed to fix that, but after printing some layers, the magnetic print bed moved because the nozzle contacted some plastic that didn’t adhere well to the previous layer, and I had spaghetti all over the enclosure. I thought maybe the nozzle temperature was too low, so I increased the nozzle temp. by 5C. Again, the print started out well it seemed, but again the nozzle contacted plastic causing the print bed to move. But this time I caught it right away and stopped the print. Examining the piece, it looks like even on the first layer, one corner has some distorted layer lines and the shell lines didn’t adhere well even to each other, and it’s apparent that the piece is warping - but only on the back-left corner of the piece. The rest of the piece looks good. I am thinking that perhaps my heated bed has a problem that is causing the back left corner of the bed not to heat properly. The filament I am using is Snapmaker PLA. Does that seem like it would cause the kind of printing problem I am seeing?
Did you rerun calibration after reinstalling the extruder?
Yes, I ran an automatic 6x6 calibration with the bed heated and recalibrated the print heads,so that shouldn’t be the problem, unless the calibration process isn’t working right. It’s puzzling to me that just that one corner has a problem.
I can’t remember the commands, but there are console commands to list off the calibration data. At the very least you can look for anomalies or out of whack data points.
Based on the bottom of the first picture, which I assume is the bottom of the print where it was printing decently, you’re not printing close enough to the bed.
When you use the calibration card, you want there to be slight resistance. Even at 0.1mm layer height, you want a bit of squish, and looking at where your infill meets the walls, there is no squish. There is a lot of voids, and because of that, there is little to no fusion between your infill lines.
Just redo your calibration exactly like you do, but this time go 0.05-0.1mm further down on the Z-axis.
Hope this helps!
Thanks for the reply. Appreciated! I did move the Z-axis down by 0.05 before I started the print (if I recall). and I did the calibration exactly as Snapmaker recommends, getting some resistance on the calibration card. I’ve printed quite a few things in the past without trouble, but after doing some CNC milling on acrylic, then changing back to 3D printing, I started having this problem with one corner not adhering well. I’ll let the bed heat up and the temperature stabilize for a while, then re-calibrate and try again. Hopefully, I can figure this out!
I routinely have to set the Z offset to +0.1mm on my Artisan after calibration. I didn’t see a way to calibrate the proximity sensor.
