I have calibrated my printer with a bunch of 20 x 20 mm test cubes. The issue come with parts I designed in Autodesk Inventor such as I specify a nut hole to be 7mm wide and comes out to like 6.32mm. File gets exported with the resolution set to High. It's accurate with external dimensions, but never with internals like holes. Any suggestions? https://reprap.org/forum/read.php?262,385975,385975#msg-385975 Mon, 13 Jul 2026 15:12:07 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,385975,389841#msg-389841 https://reprap.org/forum/read.php?262,385975,389841#msg-389841
My printer has been calibrated as accurately as I can get it with a caliper and my eyes. Steps/mm are set where they should be to travel a measured distance. Right now, it is off by about 0.5mm. Is there anything in the marlin firmware that also controls steps/mm besides the one being calculated for such as a scaling factor or something?]]> chuttney1 Printing Thu, 31 Jul 2014 21:35:43 -0400 https://reprap.org/forum/read.php?262,385975,386256#msg-386256 https://reprap.org/forum/read.php?262,385975,386256#msg-386256
To save filament, you can print only until the bottom flat part finishes, then kill the print job. Once you have the horizontal values correct, then you can plug those in as a starting point for the vertical values as for me at least, they are somewhat close in most cases.

For full disclosure, the box and hexagon functions in the file came from another OpenScad file I had downloaded for something, but I modified them a little bit.

Bruce]]> brucehvn Printing Tue, 22 Jul 2014 02:06:44 -0400 https://reprap.org/forum/read.php?262,385975,386219#msg-386219 https://reprap.org/forum/read.php?262,385975,386219#msg-386219 Ralph.Hilton Printing Mon, 21 Jul 2014 21:27:03 -0400 https://reprap.org/forum/read.php?262,385975,386002#msg-386002 https://reprap.org/forum/read.php?262,385975,386002#msg-386002 Sublime Printing Mon, 21 Jul 2014 12:10:15 -0400 https://reprap.org/forum/read.php?262,385975,385979#msg-385979 https://reprap.org/forum/read.php?262,385975,385979#msg-385979 Step one: ditch Slic3r. Infamous for having undersized inner circles.
Step two: get familiar with better slicers like KISSlicer, Cura, Simplify3D [not for the light in budget], etc.]]> MrDoctorDIV Printing Mon, 21 Jul 2014 11:31:28 -0400 https://reprap.org/forum/read.php?262,385975,385975#msg-385975 https://reprap.org/forum/read.php?262,385975,385975#msg-385975 chuttney1 Printing Mon, 21 Jul 2014 11:24:02 -0400