Micro switch

thingiverse

Needed some end-stop switches for my DIY dremel-cnc, and couldn't find any that worked for me. so I made this :) If there is interest, I might add a body-part to make it be "always on" by default, like a normal micro-switch. Comment if you want me to... Parts needed: Spring: 6x12mm (1x) Screws: M3x20mm (4x) Nuts: M3 (5x) Washers: M3 (7x) Two wires Printed parts: 1 of every part, except 2 of box_body.stl Print Settings Printer: Wanhao Duplicator i3 Rafts: No Supports: No Resolution: 0.1 Infill: 100% Notes: PLA Nozzle: 200C Bed: 70C Post-Printing Step one: filing Used a round file and a flat file to make all holes smooth, so that screws didn't bind. Especially important on box_lid Step two: assembling box_bottom Press fit one of thee washers into the recess in the part. take one of your wires, take off some insulation and twist the end (5mm) thread end of wire down into hole and press it into slot (slot has been widened since photo) put another washer on a screw, and thread into hole, capturing end of wire. add washer and nut on the other side and tighten. Step 3: Assembling box_lid and cap thread a nut onto screw (this is for adding adjustment and because my screws are a bit long) put screw through hole in box_lid put spring onto screw/box_lid put cap_plate onto screw, so that the knobby part holds the spring. put a washer on the screw thread second wire through hole in cap_hood (widen if required) fasten wire end to a washer, and put it on the screw as well add nut and tighten till screw is flush push cap_hood onto cap_plate, while pulling on wire so it goes on with no wire left inside (might want to use pliers for this) Step3: Assemble body This is the easy part. Thread two screws thorugh lid, both body parts, and thorugh bottom. Add washers and nuts Done! Step 4: mount I mounted mine using the long screw that goes thorugh the bottom. You can also mount using the other two screws, glue, or make a custom mount with your printer using the screw makes it easy to adjust the trigger spot.