VS Series Encoder Battery Replacement

Modified on Thu, 27 May, 2021 at 3:00 PM


The encoder built in the servomotor stores position data. To prevent the  position data from being lost, the encoder backup batteries supply  power to the encoder memory.
Periodically replace the encoder backup batteries that are loaded in the robot unit. In the event of using the external battery unit, replace the battery of the external battery unit.

This procedure applies to the following robot types: VS-050, VS-060, VS-068, VS-087

Tools and Parts needed

  • Philips-Head screwdriver
  • Encoder backup battery for VS series robots. 
    • 410679-0010 - Encoder backup battery

If you are not sure which part number you need  or the Robot Arm you own please stop and contact your DENSO Robotics  sales representative.  

Video Tutorial

Step by Step Guide

Step 1

Make two new backup batteries ready for use. 

Step 2

Turn the controller power OFF. 

Step 3

Remove the cover from the Encoder Backup Battery Box. 

Protected type robots (IP67) or Dust- & splash-proof type robots  (IP54) have an O-ring on the inside of the cover. Take care not to break  the O-ring. 

Step 4

Replace the backup batteries using the procedure below.

First join the connector of a new battery to an empty connector on the  robot unit, disconnect and remove the old battery, then load the new  one.

During replacement, at least one battery should be connected. Disconnecting all batteries loses position data.
Be sure to replace all batteries with new ones at one time. Using old and new batteries together shortens the service life.

Step 5

Put the cover back to the Encoder Backup Battery Box. 

Tightening Torque

 Standard type robots (IP40) 0.6 +/- 0.1 Nm 
 Other than standard type (IP40)  1.6 +/- 0.2Nm 
External Battery Unit1.6 +/- 0.3 Nm

Next Steps:

Owner's Manual Reference


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