Instruction, physical support to servo motor encoder cable.
All FAS machines with Omron servo motors with battery backup placed on the cable.
A few machines with Omron servo motor/drives have had stops with alarm code “21 – disturbance servo motor encoder communication”.
Our investigation has lead to the root cause that the backup battery, placed on the cable, due its vibration and movement during machine operation, is causing cable or connector damages disturbing the communication between the motor encoder and the servo drive. Most cases has been solved with adding an extra support to the battery to off-load the cable and connector from the vibrations.
We have only experienced this in a few machines but machine stops are costly so we are strongly recommending to do this preventive action and hopefully eradicate the issue.
If you have any questions or concerns please contact us via “firstname.lastname@example.org”