Scenario
You receive a message that an axis is at the "End of Travel" even though it
is not. The axis moves very slowly when jogging, regardless of the speed it is
set to move.
Problem
A Limit switch is damaged, disconnected or not present.
Solution
The limit switch must be checked.
Find the limit switch connector for the motor of the axis that is causing the
error.
Check that the connector is good and completely engaged.
If the problem persists, we must narrow down the location of the problem:
Note: Home switches are normally closed, so closing the circuit makes the
machine think the system is not on the switch.
- Click Setup
- Click Diagnostics
- Locate the home indicator readout for the axis that is causing trouble
under HOME in the lower left.
- Short the 2 pins on the connector that is attached to the motor (not the
one that goes to the axis)
- If it does not light up, check the controller
cable and check the rectangular motor cable. The problem is not with the
axis wiring or limit switch
- If the home box in diagnostics lights up, the wiring from the motor to
the control board is good.
- Obtain a multimeter
- Set
the multimeter to continuity or ohms.
- Test the continuity between the two pins of the cable that goes into the
axis (not the motor).
- If there is continuity, there is likely no engagement between the
connectors. Inspect the connectors for loose or broken wires.
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