We are working on the LEGO®-compatible Marble Run for up to 12 mm balls. But sometimes it helps to have a few specialty parts for curves, gentle slopes and smooth transitions.
LEGO® bricks shown in the build examples are not part of the set. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this site.
The INITIAL LAYER HEIGHT is very important! Check your printer nozzle calibration!
Slicer: Cura Material: PLA, Nozzle: 0.4mm, Layer: 0.15mm, Initial Layer: 0.175mm, Infill: 15% WallThickness: 0.8mm, TopThickness: 0.6mm --> 4 layers, BottomThickness: 0.6mm --> 4 layers Fill Gaps Between Walls: Nowhere, Filter Out Tiny Gaps: Yes, Optimize Wall Print Order: Yes
Some Bricks, like looping need: use adaptive Layer: Yes, layer variation: 0.5 --> layer 0.05 to 0.15mm