I am having difficulty getting the homing to work properly on my machine. All the home switches show up in the diagnostics screen and respond as they should. My Z axis homes fine. But when I try to home my Y axis (home neg is checked in homing and limits screen), the head comes to its homing sensor, the input light triggers in the diagnostics screen (it actually slows down briefly) then it keeps on going the same direction and pushes against the stop and faults the servo instead of backing off the sensor and setting that position as zero. Any ideas?