at one point, someone posted a picture of a caliper setup that they had which used a tape measure that let you measure down to 1/10 mm over whatever length tape measure you have.
I have created an item in onshape with the idea of 3D printing two of them, one to go on the end of a tape measure (any tape measure up to ~1" wide), and the other to be used for the measurement. These have pins to work with the holey triangulation calibration holes.
However, my experience with 3d printing is limited, I’ve done a few things, but nothing requiring significant accuracy. I think I know enough to ask most of the questions to make it work, but I don’t know the answers. I could really use someone with good 3D printing/design experience to look over the design and help me figure out how to make sure that this is actually printable
there are two parts, the second would be flipped upside down to print it.
there is a bit of overhang on the pin, but I cut it off where the curve of the pin hits 45 degrees (we could go a little more and then shave the pin to make it round I guess, but I think this is pretty close and probably good enough)
the numbers will have some overhang, I could make the numbers recessed, but the marks above them would end up with the edge having notches, so I figured they are better standing proud.
This has no allowance for the fact that the 3D printer extrudes on both sides of the line (can this be handled in the slicer?)
There is no allowance for part shrinkage (can this be handled in the slicer?)
It’s very possible that I have specified things too tightly.
the onshape link is at https://cad.onshape.com/documents/6ad35fdba3e3babde64e604a/w/a26beded4d7ab9aea561ab08/e/9f70ebf3cb3b51ce5497a353 anyone can view it and I’ll grant edit rights to anyone who wants to tinker with it.
edit: the original link points to a tab on the document that no longer exists (it still works, but gives an error message), here is the updated link. https://cad.onshape.com/documents/6ad35fdba3e3babde64e604a/w/a26beded4d7ab9aea561ab08/e/98faa5467fe149a4529f83e0