Hardware limit fault: Hardware limit switch alarm appears on PPU

What does Hardware limit Case 1 mean?

An alarm is displayed on the PPU indicating that a hardware limit switch has been triggered, preventing further axis movement in that direction.

• Axis has reached or crossed the hardware limit switch
• Faulty or damaged hardware limit switch

Click steps to track your progress.

1. 1

   Press and hold down the designated key on the PPU while simultaneously pressing the axis traversing key to move the feed axis in the opposite direction.

2. 2

   Continue moving the axis away from the hardware limit switch until the alarm clears.

3. 3

   If the fault still exists after clearing the alarm, check the hardware limit switches on the machine; verify their connection with a multimeter and check for damage.