Having to do threads manually using FreeCAD macro for a shape imported ok as a solid *.step file, displays properly & edges select to offset from & it does nothing no errors?? ... eval 2016 premium.
So ready with spec's from Mchry's Hndbk to do a helix with the max-min average diameters for the spec, this is 3d printing so I'm actually attempting to engineer the mo' fo' so it works no post-print processing or bust & this isn't elegant yet for workflow; the printer resolution is ± 0.01mm so Tolerance Class 6 for a typical M6 external.
Are there any excel macros to do this or ??? ... importing a step file that seems correct & hit a wall on a simple slice and not keep the screw head?
thx, frustrated a... tried mold tools & parting didn't work either yet a novice so no clue.