Requirement

An easy to use external radius measuring tool that I could use to measure bends so that I can 3d printed parts that fit more snug.

It should contain features that help me measure more accurately (as much as a 3d printed part can)

Stats

Usability features

• Two flat extension edges beyond radius shows up size mismatch more easily - see 3 images measuring the Bambu Lab A1 Printer frame which has an external radius of 15mm.
• Chamfers top and bottom edges and fillets on corners means that elephants feet and those kind of artifacts won't make tool less accurate and they just feel nice to touch - a DIY'ers fidget toy ;-)
• Seams are on non-measuring end faces so as not to affect accuracy.
• Multi colour print makes dimensions visible - these are in separate STL Files so that you can import all the files at once and set colours to your preference with < 1.5g of waste.
• The opposite legs act as a handle to position against an external edge.

Print settings

• Note: needs 0.2mm layer height for the lettering - lettering is on the topmost 2 layers, sitting 1 layer above the green surface and 1 layer flush with the green surface. (Assign whatever colours you want)
• Mine was printed with Bambu Labs green basic pla with black petg lettering. (Can be printed all in the same filament type too, the petg black is what I had loaded at the time)
• No supports
• 10% infill
• 2 walls is fine
• When using the supplied print profile, the parts are names contain “text” for the lettering (black in the images) and “body” for the body (green in the images)
• Note: The letter counts on each part can be as high as 8 digits, so they are all joined together with a disc that is too thin to print, so while this shows in the prepare page, it disappears on the sliced preview page (it is 0.00002mm thick). This is a nice trick to save having to assign colours to 75 parts, instead there are only 18 parts - 1 body and 1 text for each of the 9 tools.