I'm trying to set up limit switches so I can enable homing. My problem is that while the X and Y limit switch connections read open to ground (as they should), the Z limit switch connection is shorted (about 120 ohms) between the signal and ground. This is read straight off the xPro, with the switch disconnected. As a result, GRBL doesn't see the switch close and never stops the Z axis motor. Any ideas?
I'm trying to set up limit switches so I can enable homing. My problem is that while the X and Y limit switch connections read open to ground (as they should), the Z limit switch connection is shorted (about 120 ohms) between the signal and ground. This is read straight off the xPro, with the switch disconnected. As a result, GRBL doesn't see the switch close and never stops the Z axis motor. Any ideas?