My cnc mill itsn’t ready yet, but I hope it will be soon so I’ve been starting to learn a bit of gcode. Meanwhile here are my homing switches.
My approach here it’s very similar to the homing switches I did for the lathe some time ago. For X and Y axis I’d use the same type of micro optical switches; maybe RPI-131 from Rohm , maybe ee_sx1103 from Omron, not sure. For the Z axis I’d use a more typical H21A2 from Fairchild. Of course optical switches are only advisable when you can protect them from chips and debris.
After intalling and testing you should configure homing switch location and travel range for every axis (a trial-error process). Now I know the cutting envelope of my machine is 206 x 162 x 172 mm (8.1 x 6.37 x 6.77 inches).
Regarding to the nice spindle distribution box: I learn that doing deep pocket milling by hand in polyamide it’s a very unpleasant task (at least this 48x66x21 mm pocket).
Pleas note this is the only one polyamide part on the mill; other plastic parts are delrin made.
I3micro Workshop 