I have been often printing test/sizing parts to verify/refine measurements and tolerances. It is so cheap to print the small test part instead of building the full part and finding out it doesn’t fit correctly. I thought it would be good for people to share the types and purposes of their test/sizing parts.
For example, when I measure a length where I need the part to fit within a tenth of a millimeter, I print a thin test strip and see how it fits, then adjust my measurement until the test strip fits perfectly.
Here are the test strips attached to a fan I am securing to a window. I wanted the corners to join using box joints
For the frame to secure a fan within a window. On one side of the fan, I built the frame to fit within the cavity of the window frame where the closed window normally fits into to secure the fan in the window and prevent air from leaking through. So I built a small test part with two rubber strips glued to it to seal the fit in the window frame. I made several small adjustments and test parts until it fit perfectly.
I am building a sign with my wife’s business logo to stick to a window using suction cups. So I built a small part to test pushing the fastener end of the suction cup into the plastic so that it is secured and won’t fall out. The purpose of the little slit in the part is so I can put a flat screwdriver in it and twist it to break the plastic so I can remove the suction cup without damaging the plunger end of the fastener.
