This forum is a great idea, thanks for setting it up.
This is quoted from the Getting control of layer variations on smaller prints topic.
I saw the AO-100 Upgrade blog post and printed a pair of x-end 2.0 clamps this weekend. I used the AO-x-end-clamp_acme_2.0_2.gcode file from http://downloads.lulzbot.com/lulzbot/AO-101/parts/
Problem is, the parts are not dimensionally accurate on some important details:
- Center to center distance between the half-hexagonal grooves to sit under the smooth rods is about 1mm shorter than it should (see picture - at the bottom of the picture you can see the rod does not sit on the groove).
- Center to center distance of holes on the bottom plate to attach to the upper x-end-idle is 31mm instead of 32mm
- The rounded cutout on the smooth rod side is 13mm wide instead of 14mm.
It baffles me that all other dimensions seem correct, outer dimensions and the pillow block bushings holes.
Dimensioning an STL is a PITA in any CAD program and OpenSCAD code is gibberish to me. I opened the original scad file in FreeCAD, even though the import process is still not perfect it recreated most primitives which parameters can be read easily.
Any idea why something like this would happen? I have yet to generate new gcode from the original STL and print it to see if I have the same problem.
P.S. I’m NormandC on the FreeCAD forum, I’m the one who converted the TK-0 part models from SketchUp to FreeCAD.