Thanks Craig, the article pretty much explains it. Lulzbot Tech Support gave me the same answer and referral that you gave. My friend's Afinia machine produces accurate inside and outside holes without tuning the part's STL file or G-Code. Seems the Slic3r software could use a bit of tweaking in this area. Any takers?by mikebjones - General
I cannot print any tube-like object (washer or tube) where the inside diameter is not too small. I've calibrated my TAZ for X, Y and E steps. I've tried to run this calibration routine (http://blog.mcmelectronics.com/post/3D-printer-calibration#.Ue7-AdKRCrA )and get almost perfect ODs, but the IDs are small. I've tried multiple Slic3r 0.9.10b iterations with no success. I'm using Repetier-Host Vby mikebjones - General
Success! I printed without support and the problem persisted. I increased the extrusion rate by 10% so the material wasn’t being stretched as it was laid down. That allowed the material to stick where it was placed. I didn’t use support material. Picture is of before and after. Thanks to those who had input.by mikebjones - General
Forgot to mention that a buddy printed a very clean part with good threads from his Affinia, also from ABS. I can't seem to get the threads as good as his because of the support, but the rest of my part is as good or better.by mikebjones - General
This is a part from a design I'm working on. The threads are .875 x 20 tpi. I have tried 0, 1 and 1.6mm retraction. I'll try 2. Also going to try changing the options for the support material. Will try 1mm pattern spacing and .1mm Interface pattern spacing. Doesn't seem to be any difference between honeycomb and rectilinear for support pattern. Maybe that only affects the raft?by mikebjones - General
When I print inside threads of 20mm or less, The support material is formed like a spider web. Where it sticks to the threads, it is fully melted in and removes the thread when the support is removed. The same printer settings work OK with same pitch thread but 35mm diameter. I've slowed the printer to 30mm/s and am printing support for 45 degr overhang or more. The rest of the part is OK, justby mikebjones - General