Fisher Delta Optical Axis endstop for Gen7

thingiverse

This is a mod to upgrade the original axis endstop micro-switch with a gen7 type optical encoder. These are pretty cheap off ebay ( £7 per 3-off at time of writing). The tab is fixed to the carriage and breaks the beam of the optical switch, which is long enough to work with slight overtravel during the Fisher datum routine. I printed the blocks in PLA and friction welded them in place with PLA filament using a Dremel. The endstop is screwed into the holes in the block using wood screws, and the tabs are centered with units raised and stuck in place with some fletching adhesive ( I haven't got round to spin welding them yet ). The endstop pins are bent and soldered so the fixed cable is routed out of the way of the Bowden tube. The switch type is S1 in the config. To set the XYZ axis offsets in the config file, you will go through the normal iterative process (using the measuring macro and subtracting the errors from the previous config offsets). It is stable once done. Existing micro-switches only use 2 wires ( switching Ground ), but new ones have a 3rd wire for +3v supply. Printer: Reprapro Fisher Rafts: No Supports: No Resolution: 0.1 Infill: 15% I designed this using Autodesk Inventor 2016