I have no clue why this is happening, but when I home my delta, it grinds a bit before topping. I've ensure the right endstops are triggering the right towers (ie. X carriage is triggering the X endstop, Y to Y, Z to Z). I've verified M119 - everything's showing as triggered. The only thing I've changed are the stepper motors. I can no longer run any bed leveling, because the vibration from the gears grinding through the belt sets off the FSRs.

the connections on the endstops are set to 'Normally Open'
Any help would be greatly appreciated.
thank you in advance.