I’m printing on a TAZ 5 standard setup with Hexagon head. I have recently run into the problem that items I am printing are coming out lumpy and distorted. I’m not really sure how to describe it, so I’ve included pictures. The mystery here is that these exact parts, with the same material and settings, printed cleanly in the past. The only change I can think of is that a couple weeks ago I moved the printer from one desk to another desk right next to it (total distance moved ~5 feet.) I’m thinking this could have messed something up, but I’ve had clean prints since the move.
The material here is PLA/PHA, printing at 225/70. Layer height .14, Speed 50mm/s. There’s no problems with bed adhesion. I’ve looked around for existing threads on this issue, but as I’m not really sure how to describe it, I’m not sure what to look for. I had wondered if it was a cooling issue. There’s no enclosure on the printer, and if I leave a door open there can be a draft. But this was never a problem in the past, and I still get these issues if I close the doors and eliminate the draft.
Upon further examination, I can see that the problem is areas curling up during the print. When the print head passes over, it pushes them back down again, but then they curl back up. It’s especially bad on areas with slight overhang, as they are thinner. No problems with adhesion to the bed though.