Negative Overtravel Limit Exceeded

What does 501 mean?

The machine has exceeded its negative stroke limit. This indicates a physical limit switch activation or an incorrect move command, which can cause mechanical interference or damage.

• Negative stroke limit switch (*-OT) is incorrectly connected or activated
• Incorrect move command specified, leading to overtravel

1. 1

   Check whether *-OT is connected correctly

2. 2

   Check whether a correct move command is specified

3. 3

   Move the tool in the opposite direction in jog mode, then perform a reset