maker2 wrote: ↑Sun Jul 25, 2021 12:10 pm
Assume that you are delighted with the build surface and have tried on different areas of bed. Would definitely try stepping down 0.05mm at start of print to ensure a bit of elephant's foot and that everything is properly squished.
If the slicer is really in line of fire then how about checking the G-code on the straight bit?
1) Slice with zone in question over origin so can search in code for moves around X0, Y0;
2) find the perimeters corresponding to the delaminated straight area and note length extruded, Z height and extrusion amount. Should all cohere.
That would at least eliminate S3d (or not).
Thanks for the comments. I'm getting good adhesion now, using -0.02 mm Z offset. That gives me a small amount of elephants foot. Increasing the offset won't fix the under extrusion on all the higher layers, it will just close up the gap on the bottom. I'm mostly trying to fix the gaps for structural reasons, so just tacking the bottom layer together doesn't help much.
I'm afraid I'm not very fluent in searching & deciphering G-code. I have S3D 4.0.1 still installed, and can try that later today when my current print job finishes. It's still got about 4 hours to go... I may have time to try PrusaSlicer as well. The test prints don't take very long to run. With luck I'll have results from both experiments by sometime this evening.
If Ver. 4.0 fixes the gaps, it's likely an S3D Ver. 4.1 bug. Of course, given the fast turn around on updates these days, that's bad news...