Product Alert: Safety notice for all UR3, UR5, UR10 CB3 (Generation 3) robots
The purpose of this message is to provide advanced notification of an upcoming product update.
To: Universal Robots Customers and Distributors
From: Universal Robots Global Technical Compliance
Date: 7 February 2020
Subject: UR CB3 (Generation 3) robots – all sizes (UR3 with SN less than 2019330933, UR5 with SN less than 2019352041 and UR10 with SN less than 2019302211) Polyscope Software Update
Polyscope 3.12 and higher, includes significant improvements and it addresses two identified issues: (1) power supply output over-voltage and (2) unexpected motion after an encoder fault. Polyscope 3.12 is in all CB3 robots being shipped.
After extensive testing and analysis, we discovered that the UR CB3 controller can overheat due to the power supply output being too high. If this over-voltage situation is not detected, a fire could result. Further, an investigation into unexpected motion has uncovered that this motion was due to an error of motion after an encoder fault. It is unlikely that the foregoing would happen.
(1) The PSU voltage and robot power consumption are monitored. Upon exceeding the factory limit, the robot will enter a fault mode (possible error codes C60, C61 and C65), stop, and power will be removed to the robot arm and from the energy eater portion of the controller. In this fault mode, further heat buildup is eliminated. Do NOT restart the robot from this fault.
(2) Unexpected motion will not happen after this encoder fault, instead the robot stops.
To minimize risk of a fire and unexpected motion due to an encoder fault, Universal Robots urges all CB3 robot customers to upgrade to Polyscope 3.12 or higher.
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WARNING: For CB3 control boxes, using Polyscope software prior to 3.12:
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Polyscope 3.12 or higher includes monitoring power consumption and eliminating motion upon encoder fault.
Before updating CB3 robots to Polyscope 3.12, check the CB3 control box main voltage. The voltage must be below 48.7V to successfully power-on after the 3.12 update. If it is 48.7V or higher, an unauthorized change could have been made to the robot controller which voids the warranty.
Contact your regional UR representative (see below) if the voltage is 48.7V or higher.
The following document links provide the files and procedures to complete the Polyscope update:
- Procedure to check the PSU voltagefor installing software 3.12.
- Polyscope 3.12 software download.
- For guidance about software installation, see Section 4 of the CB3 Service Manual.
- FAQs for the Polyscope 3.12 Updateare developed and updated on an on-going basis.
See “how to tell if your new robot has 3.12 or higher software factory-installed”.
The UR Support site has many useful files: www.universal-robots.com/download/. If you have questions about this Safety Notice, contact your regional UR representative.
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Universal Robots A/S expressly disclaims liability for any and all damages or injuries caused as a result of customer’s failure to operate the robot in strict compliance with the User and Service Manuals, follow and implement the recommendations in this Safety Notice. |