Hello, I have a Lead 1010 with xtension limit switches nema 23 and Makita spindle , i've already read the posts about Emi and how to solve it , but i can't figure it out. All my wires are shielded , i use Xtension limit switches , my spindle wire is away from all other wires , but i use Arduino Uno instead of blackbox , i have also grounded all limitswitches to one ground pin (may this be the cause?) , oh one more thing is my x axis wires are in the channel just like in the openbuilds video motor and limit . Thankfull for all help
Which has no active filtering like the Blackbox has, and less protection (grounded case etc) The Grbl Wiki has some details of basic pull up and capacitor filtering you can try