I’m encountering a weird problem that only seems to happen on models with a large surface area on the bed. I’m using eSun HIPS 3mm filament at 240 degrees on a Lulzbot Mini.
During the course of a 10-14h print, the corners of the object raise off the hotbed and distort the lower layers accordingly.
I’ve tried mitigating this with a number of approaches:
Raising the bed temperature from the standard 110 degrees for HIPS to 115 helps somewhat. Further increases in the bed temperature have no discernible effect (I went up to 125 degrees).
Setting the z-index to -0.05 to increase the adhesion of the first layer again helped somewhat, but not much.
I’ve tried printing with a brim, but it turns out that this does not help: the brim stays stuck on the hotbed, but the corners of the main object still rise as the print progresses.
Resolution (low, medium, high) has no notable effect.
I’m all out of ideas and could use some good suggestions what else to try to address this.
I’ve attached an STL that exhibits the problem when printing.
box1.stl (26.2 KB)