Lumps on thread Hi, This is a cap for a propane tank and it has an Acme-thread. Latest version of three Slicers, (.appimage) running under Ubuntu 16.04. From Left to Right, the pic shows sliced with Cura, Slic3r-PE and Slic3r. Slic3r and Slic3r-PE both have lumps on the threads. All three have the same settings for Layers, speeds, Retraction etc. I **think** it has something to do with Slic3r's Retraction (5mm at 40mm/s) as when printing, it pauses momentarily about where each lump is. I really prefer Slic3r to Cura but obviously this is not an option. Is this something I can tune out or not? If I can, how? Thanks https://reprap.org/forum/read.php?263,839983,839983#msg-839983 Fri, 17 Apr 2026 11:46:48 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?263,839983,841421#msg-841421 Re: Lumps on thread https://reprap.org/forum/read.php?263,839983,841421#msg-841421 Or find out, why it retracts there anyway? (minimum length between retractions)]]> o_lampe Slic3r Sat, 15 Dec 2018 03:53:24 -0500 https://reprap.org/forum/read.php?263,839983,840917#msg-840917 Re: Lumps on thread https://reprap.org/forum/read.php?263,839983,840917#msg-840917
-z hop (off)
-Seam position, try nearest, random etc.
-You could try turning off "detect thin walls" if its on.
-check out your gap infill speed and external perimeter speed.
-avoid crossing perimeters, (on)

I would be interested to see what the issue is.]]> Number_5 Slic3r Mon, 10 Dec 2018 06:15:02 -0500 https://reprap.org/forum/read.php?263,839983,839983#msg-839983 Lumps on thread https://reprap.org/forum/read.php?263,839983,839983#msg-839983
Latest version of three Slicers, (.appimage) running under Ubuntu 16.04.

From Left to Right, the pic shows sliced with Cura, Slic3r-PE and Slic3r.

Slic3r and Slic3r-PE both have lumps on the threads. All three have the same settings for Layers, speeds, Retraction etc.

I **think** it has something to do with Slic3r's Retraction (5mm at 40mm/s) as when printing, it pauses momentarily about where each lump is.

I really prefer Slic3r to Cura but obviously this is not an option. Is this something I can tune out or not? If I can, how?

Thanks]]> StlLooking Slic3r Thu, 29 Nov 2018 13:35:15 -0500