Pegboard Jumper Rack

thingiverse

I loved the concept of uumeran's jumper rack, but wanted something a little stronger and easier to use. I also wanted it to hang on a pegboard without needing extra hardware. With a larger tine cross section this can easily support 80mm tines. I've tried up to 100mm, but they start looking a little silly at that point. If you want really long tines, you'll need to make them wider or you'll get too much horizontal flex. Most pegboard in the US is 1/4" fiberboard, so that's what the pegs in this design use. But in my workspace I have thin steel pegboard, so I parameterized the thickness so I could make the rack work in either material. The taper at the end makes it much easier to insert wires into the rack. Print Settings Printer: Flashforge Dreamer Rafts: No Supports: Yes Notes: I've printed this in ABS with multiple settings and had very few problems, although FlashPrint chokes on anything more than five tines, for some reason. (Simplify3D works well.) I print with the tines pointing straight up, with support, because that produces the best outcome aesthetically. Post-Printing Removing supports The tricky bit here is separating the print without damaging the peg hooks. They're easy to break off if you apply too much lateral force. (This doesn't tend to be a problem in use because the large face braces the piece against the pegboard and limits the forces on the hooks.) Nothing a little superglue won't solve, but it's nice to get it right the first time. So be very, very careful as you separate from the plate or raft. How I Designed This Thanks to uummeran for creating the base model and doing the math. I moved a lot of the calculations out of the primitive creation calls and up into the transformation stack, which I think makes the code easier to maintain and extend. The final design shows how useful OpenSCAD's "hull" command is. I got a shape that I really like out of a very small set of primitives.