RE: 3D print LEGO element
2025-02-07, 23:31 (This post was last modified: 2025-02-07, 23:34 by Chris Böhnke.)
2025-02-07, 23:31 (This post was last modified: 2025-02-07, 23:34 by Chris Böhnke.)
I have never tried this myself, but maybe pre-adjusting a few details of the LDraw file (still in .dat format) will help with this?
Whilst there is a whole lot of tolerances in play we have little knowledge of, we know that a few functional details are omitted in digital models:
*Lego themselves give Technic pin holes often as "Ø4.9" implying a 4.9 mm hole. LDraw's standard at 12LDU translates to just 4.8mm, creating a tighter fit
*Bricks and similar elements are assumed as multiples of 8mm/20 LDU, ignoring the 0.1mm play around each brick. I am not sure, but I think studless Technic beams have even more play.
Maybe making a copy of the hole primitive, adjust the diameter, then inline the "fake primitive" for the export gives a better result in printing?
EDIT:
Ok, will likely not do much, if the nozzle has a resolution of 0.2mm...
Whilst there is a whole lot of tolerances in play we have little knowledge of, we know that a few functional details are omitted in digital models:
*Lego themselves give Technic pin holes often as "Ø4.9" implying a 4.9 mm hole. LDraw's standard at 12LDU translates to just 4.8mm, creating a tighter fit
*Bricks and similar elements are assumed as multiples of 8mm/20 LDU, ignoring the 0.1mm play around each brick. I am not sure, but I think studless Technic beams have even more play.
Maybe making a copy of the hole primitive, adjust the diameter, then inline the "fake primitive" for the export gives a better result in printing?
EDIT:
Ok, will likely not do much, if the nozzle has a resolution of 0.2mm...