Yesterday I removed my mechanical homing/limit switches as I started getting noise like several others. I replaced the homing switches with hall effect limit switches. I purchased 5 of them from:
These switches have 3 connections instead of the 2 on the mechanical ones. 1 goes to the Arduino Ground, 1 to the Arduino +5 volts and the third to the appropriate pin just like the mechanical switches. There are 2 LEDs to indicate the state, tripped or not, red and green.
I have run the homing sequence about 200 times since yesterday when I installed them with no issues at all. I set a point using the G28.1 command, homed the machine and sent a G28, I was able to get repeatable homing every time.
I tested them as limit swithces briefly, as I sent the gantry into the switch at 175IPM and it stopped movement perfectly. I will add switches to the other end of the X and Y Axis this weekend.
Here is a quick video of the homing sequence.
