For accurate holes you want a single outline, or make sure the outer ones (inner in holes) are done first. When you stack extrusions next to each other the exact width depends on the viscosity of the plastic, which the slicer doesn't know about. On Wed, 14 Apr 2021 at 14:13, Terrypin via Discuss < discuss@lists.openscad.org> wrote: > > > > ---------- Forwarded message ---------- > From: Terrypin <T.pinnell@btinternet.com> > To: discuss@lists.openscad.org > Cc: > Bcc: > Date: Wed, 14 Apr 2021 06:13:11 -0700 (MST) > Subject: [OpenSCAD] Re: Polyhole tester: unexpected result after printing > Thanks for those three helpful posts mondo. I guess we’re OT now but...I > swapped the original springs for the improved (stiffer?) ones and did spend > a lot of time on bed levelling. But clearly don’t yet have it 100% sorted! > > P.S. How do I edit a post? Using ‘Edit this page’ plainly isn’t the way. > > Terry > ------------------------------ > Sent from the OpenSCAD mailing list archive <http://forum.openscad.org/> > at Nabble.com. > > > > ---------- Forwarded message ---------- > From: Terrypin via Discuss <discuss@lists.openscad.org> > To: discuss@lists.openscad.org > Cc: Terrypin <T.pinnell@btinternet.com> > Bcc: > Date: Wed, 14 Apr 2021 06:13:11 -0700 (MST) > Subject: [OpenSCAD] Re: Polyhole tester: unexpected result after printing > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

Bed leveling is pretty essential, but the z-offset is what controls adhesion in general. If you are leveling manually, use thinner paper or at least set it up to grab the paper more strongly , if you are using ABL, set the z-offset lower. I usually print a 25mm square patch, one layer thick, and if it has a smooth surface with no gaps, it is probably about right. Gaps or actual loose strings of filament is too high, and a rough surface usually means too low On Wed, 14 Apr 2021, 11:32 nop head, <nop.head@gmail.com> wrote: > For accurate holes you want a single outline, or make sure the outer ones > (inner in holes) are done first. When you stack extrusions next to each > other the exact width depends on the viscosity of the plastic, which the > slicer doesn't know about. > > On Wed, 14 Apr 2021 at 14:13, Terrypin via Discuss < > discuss@lists.openscad.org> wrote: > >> >> >> >> ---------- Forwarded message ---------- >> From: Terrypin <T.pinnell@btinternet.com> >> To: discuss@lists.openscad.org >> Cc: >> Bcc: >> Date: Wed, 14 Apr 2021 06:13:11 -0700 (MST) >> Subject: [OpenSCAD] Re: Polyhole tester: unexpected result after printing >> Thanks for those three helpful posts mondo. I guess we’re OT now but...I >> swapped the original springs for the improved (stiffer?) ones and did spend >> a lot of time on bed levelling. But clearly don’t yet have it 100% sorted! >> >> P.S. How do I edit a post? Using ‘Edit this page’ plainly isn’t the way. >> >> Terry >> ------------------------------ >> Sent from the OpenSCAD mailing list archive <http://forum.openscad.org/> >> at Nabble.com. >> >> >> >> ---------- Forwarded message ---------- >> From: Terrypin via Discuss <discuss@lists.openscad.org> >> To: discuss@lists.openscad.org >> Cc: Terrypin <T.pinnell@btinternet.com> >> Bcc: >> Date: Wed, 14 Apr 2021 06:13:11 -0700 (MST) >> Subject: [OpenSCAD] Re: Polyhole tester: unexpected result after printing >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >