Every 3D printer has limit switches. When the 3D printer starts a print job it touches the switches to sense the position of the printer head, and then counts the steps to measure the movement from there. If your printer has a physical contact switch, you may find after several prints that the switch has been nudged a little bit and the printer needs to be recalibrated. Who needs that hassle? Get touchless limit switches that never move!
This touchless limit switch has two mounting holes and a sesnor gap. When an object passes through the gap the beam of light is interrupted, which triggers the switch and causes the voltage on the signal wire to rise.
cable: 50cm detachable (5v, signal, ground)
dimensions without cable connector: 33mm * 10mm * 13.5mm
dimensions with cable connector: 33mm * 10mm * 23mm
sensor gap: 2.4mm * 8mm * 6.25mm
normal state: open (block signal to close switch)
- touchless endstop 3D model
- Example Arduino code
- 3D STL files for mounting ELEC-0112 on a Prusa 2 printer