I've gotten to the point on my machine where I want to add some end stops. I know I should have had them there to begin with, but I was too anxious to get cutting... I have 3 end stop switches that are just the lever type, they don't have the roller at the end and I am assuming they should work ok based on how I'm going to mount them. I wired up three of the switches to my Grbl based arduino cnc shield. V3. I wired them to the Z+, X-, Y -. according to what I've read, I should not need any pull up or down resistors. All I need to do is wire the normally open tabs to the two pins on the board for each axis. I enabled homing in Grbl and soft endstops. I sent the home command and the Z axis moved up but when it hit the endstop it crashed. I tested the switches to make sure they were working ok. When I press them by hand, I get a message in the grbl panel that and endstop has been hit (only after resetting and unlocking). I haven't been able to test X and Y since Z wont even work. Any ideas? Thanks.