Scale, rotate and mirror
Take your model to exact millimeter dimensions, fix units (inches→mm), rotate it, mirror it and lay it flat on the bed before printing.
Take your model to exact millimeter dimensions, fix units (inches→mm), rotate it, mirror it and lay it flat on the bed before printing.
The viewer shows it on a print bed with the Z-up convention.
Type the final width in mm, rotate in 90° steps, or mirror for the left/right version.
Operations are applied to the vertices themselves — the STL comes out ready, no metadata tricks.
It was modeled in inches and your slicer reads it as mm (1" = 25.4 mm). The inches-to-mm button multiplies everything by 25.4 and puts it at the right scale.
They're applied directly to vertex coordinates rather than stored as separate metadata. Any program that opens the file afterwards sees the part already scaled and rotated.
No: when mirroring, triangle winding is flipped too so normals keep pointing outward. The mirrored model prints just as well as the original.
It translates the part so its lowest point sits at Z=0, the way slicers expect it. No more parts floating above or sunk into the bed on import.