The file 'Remix Of Lucas_Rogers V2 Yardstick Calipers 3D Printer Model' is (blend,stl) file type, size is 261.5KB.
3rd refinement.
Supports are needed to print the upper/internal jaws.
I had best results printing this at .2mm resolution. Other settings: .4mm line width, 8 walls, 1.28mm top and bottom (an error, it should have been evenly divisible by .2).
I used M3 bolts screwed directly into the plastic to hold the clamping tab on. The nut and bolt are 1/4-20. If you use a #6-32 screw that is 3" long, you can use these calipers on a workshop ruler as pictured. The moving jaw slides very well on an aluminum ruler.
Parts List
I used a small piece of 1/8" thick (3.175mm) aluminum as a shim to prevent damage to my ruler. It also helps the bolt stick out less when used on thicker rulers. I used a similar shim made from thin ( ~1mm / .050" ) steel on a wooden yardstick. You can see the aluminum shim in one of the photos.
calipermodfixed.blend | 527.4KB | |
calipermodfixed.stl | 91.7KB | |
calipermodfixed3.blend | 530.4KB | |
calipermodfixed3.stl | 92.9KB |