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6.6.2. How to Replace Motor

6.6.2. How to Replace Motor​

 

(1)   Set the controller to teaching mode and set the robot to standby [ON] condition. If the robot is not in standby [ON] condition, check whether the arm is sufficiently fixated to avoid it from dropping. And then proceed to (4).

 

(2)   The axis requiring motor replacement takes basic posture.

 

(3)   For S, H, V axis: Refer to [Fig. 6.2 ~ 6.3]

For R2, B, R1 axis: Set the zero point for each axis by using the key and V-groove.

 

(4)   Turn the main power [OFF] with the controller power [OFF].

 

(5)   Disconnect the connector from the motor.

 

(6)   Upon disconnecting the motor wire, remove the motor bolts to detach the motor from the robot body.

 

(7)   Detach the gear from the motor shaft.

Be careful to avoid excessive impact to the motor.

 

(8)   Assemble the gear after lightly applying grease to the shaft.

The bolt used to attach the gear to the shaft should be cleaned and removed of grease before using. Apply Loctite 243 to the screw part of the bolt, and then tighten it using a torque wrench in a regular torque. Besides, slowly tighten the bolt in a symmetrical order.

 

(9)   Assemble the motor on the robot after applying a moderate amount of grease to the teeth of gear.

 

(10) Connect the connector to the motor.

 

(11) After you have replaced the H and V axis motor, newly refill the grease.

 

(12) Reset the encoder of the axis whose motor is replaced.

 

 Warning

Before encoder correction, check motor connections, with motors [ON], while pressing the Enable switch for 2~3 seconds.

 

(13) Perform the encoder calibration about the axis whose motor is replaced. Refer to the chapter [Encoder Calibration] in the controller operating manual.

 

(14) Confirm that there is no error in robot's motion.

 

 

Figure 6.2 S axis motor replacement

 

Figure 6.3 H/V axis motor replacement

 

Caution

 

When replacing the H/V axis motor, the upper arm must accurately be aligned to the direction of gravity to the mechanical stopper so that the upper arm does not rotate.

 

 

Figure 6.4 Wrist axis motor replacement

 

 

Figure 6.5 FGP motor replacement (Option)