Screw power switch for combat robots

thingiverse

This is general purpose screw switch made for 150g combat robots. This is low cost low current alternative for fingertech switch. It weights 2.5g with short wires and mounting screws included. No supports needed for this print. All you need it: - 2x M3 square nuts (5.5x2mm) - 1x M3x6 screw (don't use stainless steel, use aluminium or carbon steel screw) - 2x M2x8 mounting screws - a metal file - metal pliers - soldering flux - a soldering iron - 16-20 AWG silicon wire so something similar depending your use Steps: - File one side of the square nut clean to make better soldering surface. - Apply soldering flux to the filed side of the nut. - Solder wires to square nuts (I used 20AWG cable) - Press nuts into the print. File corners of the nut if print tolerances are too tight. - Insert M3x6 screw to test continuity of the switch. - (optional) apply conformal coating or hot glue over the solder joints. 1.6mm mounting holes are 8.5mm away of each other. Depending what material did you use you might need to drill out the holes or use M2 nuts. I used nylon which is nice material to thread screws into. If you have problems printing I included a beefier model which has more material around the edges.