This is a simple Z axis limit switch holder for the MPCNC.
They are two variants, one for use with a reprap style limit switch board and one for use with a bare micro-switch.
In both case the micro-switch must have a straight lever and must be wired in a normally closed mode.
This means that if you're using the reprap style board, you must:
- desolder the micro-switch
- Add small wires to deport the micro-switch.
- Solder the wires to the board, switching the NC and NO connections.
The micro-switch is fixed using 2 small M2 screws (mine were salvaged from some broken electronic appliance) or glued
The holder itself is screwed underneath the lower Better Middle Z - Add On of the middle assembly.
Adjust the position of the holder before tightening the screws so that the switch is gently closed when the pipe is engaged. The switch must open when the pipe goes up.
I'm using this limit switch holder on a IE version of the MPCNC and it works great.
I don't know if it will fit the US version. If you try it, let us know !!