I’m having trouble printing Benchy. I’ve researched and experimented, but for the life of me I can’t seem to correct it. I assume it’s temperature related, but nothing I do works. Here’s my latest attempt.
I’ve watched it print, and have noticed that overhanging areas, like the lower hull section, or the the tops of the arches over the doors, curl up as it’s printing. Even the top stack was soft and moving around as the nozzle moved. The best I can tell from my research is that this is a temperature related issue, but I’ve tried high and low extruder temps (215-240), bed temps (100-110), and fan speeds (40/50-80/90), and no matter what combination I use I keep getting the same result.
This attempt was printed with Lulzbot HIPS, nozzle @ 240, bed started at 110 and dropped to 100 after .5 mm, fan speed @ 40-50%. It’s also worth mentioning that I’m having trouble with bubbles in my PEI sheet (pictures on this thread: https://forum.lulzbot.com/t/pei-bubbles/3953/1), but since it seems to print the wheel-house walls well enough but still has the same issue at the top of the arches I don’t think it’s related.