Smooth cylinders instead of facets I've been trying to print a cylinder without facets or at least decrease the size of the facets. I'm not sure if the program I used caused the facets or if facets are something necessarily inherent to stl files and the circle was actually smooth in autocad but was faceted in the stl file conversion. Is it possible to print a true cylinder from a stl or is there a minimum resolution that slic3er limited the the stl or maybe the stl limited the amount of cylinder facets? https://reprap.org/forum/read.php?263,598980,598980#msg-598980 Mon, 09 Mar 2026 04:47:43 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?263,598980,601399#msg-601399 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,601399#msg-601399
You were right that the issue was the cad software's resolution. For anyone using Autocad having this issue just increase "facetres" (command) to 10.

The circle looks completely smooth to me

[attachment 68389 9y4IvSd.jpg]]]> Allnight Slic3r Sun, 27 Dec 2015 14:27:27 -0500 https://reprap.org/forum/read.php?263,598980,600329#msg-600329 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,600329#msg-600329
If you like the ease of use of Sketchup, you will like DesignSpark Mechanical much more. It's as easy to use as Sketchup but much more powerful for designing precise physical objects. You won't have to repair STL files from DSM in order to print them.]]> the_digital_dentist Slic3r Thu, 24 Dec 2015 03:13:17 -0500 https://reprap.org/forum/read.php?263,598980,600187#msg-600187 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,600187#msg-600187 For a 100mm dia circle that would yield a segment of 2.62mm, or 0.26mm for 10mm.
Default yields 13mm segments.]]> ruggb Slic3r Wed, 23 Dec 2015 14:06:44 -0500 https://reprap.org/forum/read.php?263,598980,600023#msg-600023 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,600023#msg-600023
Quote
sfinke
This is definitely a CAD export issue. Look for facet settings, resolution, facet angle, something along those lines.

3D printers are essentially 2 1/2 axis cnc machines so yes they can read G2/G3 codes, otherwise your program would become prohibitively long and take longer to slice.

No, that is incorrect. The STL cannot contain any information about curves or circles, and none of the popular slicer applications makes any attempt to use G2/G3 codes (apart from a couple of experimental beta releases I've heard of). Even if the slicing software were to analyse the STL and attempt to detect curved sections, the firmware in a great many printers does not support G2/G3 moves.

Dave]]> dmould Slic3r Wed, 23 Dec 2015 07:34:54 -0500 https://reprap.org/forum/read.php?263,598980,599780#msg-599780 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,599780#msg-599780
3D printers are essentially 2 1/2 axis cnc machines so yes they can read G2/G3 codes, otherwise your program would become prohibitively long and take longer to slice.]]> sfinke Slic3r Tue, 22 Dec 2015 11:27:01 -0500 https://reprap.org/forum/read.php?263,598980,599631#msg-599631 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,599631#msg-599631 dc42 Slic3r Tue, 22 Dec 2015 03:33:29 -0500 https://reprap.org/forum/read.php?263,598980,599425#msg-599425 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,599425#msg-599425
The best way to control this is with the resolution used in your CAD program.]]> jbernardis Slic3r Mon, 21 Dec 2015 14:12:37 -0500 https://reprap.org/forum/read.php?263,598980,599283#msg-599283 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,599283#msg-599283 RRuser Slic3r Mon, 21 Dec 2015 08:13:58 -0500 https://reprap.org/forum/read.php?263,598980,598994#msg-598994 Re: Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,598994#msg-598994
Example attached...]]> the_digital_dentist Slic3r Sun, 20 Dec 2015 13:42:13 -0500 https://reprap.org/forum/read.php?263,598980,598980#msg-598980 Smooth cylinders instead of facets https://reprap.org/forum/read.php?263,598980,598980#msg-598980 Allnight Slic3r Sun, 20 Dec 2015 13:25:38 -0500