For the parts to easily fit one another, maintain alignment to allow assembly, and be easily removable from the form after assembly, a clearance of 0.6 mm is designed into the fixture.
FDM printers have some limitation to their accuracy. This limitation is typically accounted for by designing in some offset or clearance to
the parts. If the parts are to fit for example, a hole inner diameter to a shaft outer diameter, 0.2 mm between the parts is often sufficient in
my experience, on the Creality Ender 3 FDM printer. The Ultimaker 2+ has proven to be slightly less accurate and a clearance of 0.5 mm
is required. Armed with this knowledge, a clearance of 0.6 mm has been applied to …