Quote Originally Posted by Radu_Andrei View Post
Hi again.
Shortly after the the 3 weeks old conversation, I received 3 inductive switches, which I.ll install next week.
I like Rob.s approach of also keeping some mechanical switches in place next to the homing ones, but I.m somewhat unsure what.s the best way to wire all this.
I.ve only got 5 pins on the Bob, one being used for the probe. So 4 pins for the remaining Estop, 6 mechanical limit switches (2 for each axis), 3 inductive homing switches (3wires).

So for example (let.s say P15 is the probe)
1. Combine all limits and estop in let.s say P10 and have P11,12,13 for x,y,z home switches.
2. Combine all limits in P10 and all homes in P11, Estop in either P12 or 13
3. Combine the limits and home of each axis in one pin

So what the best wiring option and why?
I have all the limit switches and estop wired in series (NC) to the main contactor that powers everything except the breakout board. One signal wire goes through a spare contact of the contactor to the breakout board to tell mach3 to stop the g-code.

The homing sensors are connected to the same BoB input in parallel as I don't use simultaneous axis homing but need the spare inputs (actually I use one more input on X as I have dual motors and need to square the gantry). The homing sensors are configured as home and limit in mach3.

In 5 years I've never hit the limit switches one single time as the sensors are working as limits as well and never failed.