How to activate LE-4040 limit switch on Lasergrbl
Step 1: Enter $$ in command window, click Enter.
Step 2: Find the default limit switch setting: $21=0, change it to $21=1 to activate limit switch function.
Step 3: Enter command $21=1, click Enter
Limit switch is enabled.
Step 4: When limit switch is triggered, it will show warning (as the picture shows) and needs to reset to continue. Click to reset.
Step 5: The status on the right bottom corner will show Alarm. Click to unlock. Then it can work as normal.