Background:
This alarm can occur if the 4 D-Cell Alkaline batteries, in the mechanical unit, drain below 4.5 volts or if the pulse encoder cable is removed from the encoder cap.
Solutions:
Recover is a three step process: - The alarm needs to be "unlatched", which is accomplished by going to the MASTER/CAL screen and pressing F3 [res_pca]. This command fires an unlatch pulse to all the encoders. Turn OFF and Turn ON the controller, so that it may re-boot with the encoder alarms "unlatched". If the controller is successful at unlatching the alarms, it will be replaced by a new error message "SRVO - 075 Pulse not established".
- You will need to jog each robot axis about 10 degrees to insure that the "Revolution Marker Pulse" passes by each encoders' pulse detectors. Once the jogging is complete, pressing the RESET button should clear the SRVO - 075 alarm.
- The robot will need to be "mastered" and "calibrated".
How do we avoid this problem from occurring in the future?The batteries should be replaced as part of Preventive Maintenance procedures as described in the Preventive Maintenance sections of the manuals provided with the robot.
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