What is a Limit Switch?

Limit Switches serve two purposes:

Homing

In Homing you command your machine to move to the homing limit switches at the extreme ends of each axis to determine the 0,0,0 (ZERO) point of the machine

Limits

In Hard Limit mode, the switches act as “safety” mechanisms: If your machine moves outside its safe envelope, the carriages will hit the limit switches. This tells the controller something is wrong, and the controller goes into an ALARM state that stops all movement (keeping you, and your machineĀ  – safe!)