Here are all 3 print (PLA) parts, a total of 42 different parts some to be printed in several copies.

 

All parts are tested and work on Flashforge Finder.

Some finishing work is required.

 

Test with "Capstan-wheels-12mm.stl" print it fits it perfectly on the step motor shaft, then the rest of the prints should fit well, if not there is a setting in the slice program to change the scale try to change a few percent.

 

The iron plate to which everything is attached is reported in dimensions on the page "Chassis structure"

3D print parts and assembly of parts