I finally got my printer working again. I spent the whole day going through Teaching Tech’s calibration steps. All the flat calibration gcode looks fine. The Benchies are another problem though. I’m printing with a 0.6mm nozzle for the first time.
On the smaller benchy I printed at 0.2 layer height, with a perimeter speed of 40mm/s at 210/60 temps. The bigger one is 110% larger and printed at 0.25 layer height, with a perimeter speed of 60mm/s at 215/60 C.
The problems are mostly manifested in the same area. Big blobs in the rear and layer shifting on the tail pipe. Large layer shifts/bulges in the center. I’ve never really ran into this problem before so I don’t know where to start when diagnosing this.
Check and make sure that your z screw is not sticking or binding. Also, make sure that the hotend is tightened and there are no gaps where filament can ooze from.
oh this is so weird. so very weird. look at this picture in particular. Look at the layers weaving up and down well before you get to the big ridges, when they still are… semi-normal. It’s not corner curl, it’s happening where the bottom is actually still flat. What the actual fuck.
Looking at that corner… it definitely just looks like corner curl. It can be incredibly hard to see when the printer is going, but unless your slicing software was telling the printer to raise the Y axis in the exact same pattern every layer, nothing can really cause that besides the corner of the print coming off the bed. You can fix that part by playing with the bed temp settings. Too low and the first lines won’t stick, or the print might pop off the bed of the nozzle runs through some hairy parts. Too high and you get prints like yours.