V5 motors keep dying

Firmware fix was never a viable option, imo.

Sure, you could limit motor power to 50%, if that’s all that diode could dissipate without dying.

But then you have to limit the power on all motor revisions, or it would be unfair to people who bought rev10.

Then people will have to redesign their robots and strategy, because 1 motor flywheels no longer work, etc…


Are there any news on this? Teams are hurting here without motors…


@levipope Any updates on the situation?


Do note that VEX Robotics is closed until January 2nd for the holidays. Don’t expect responses from engineering team during this week.

Enjoy the break! and thanks to the moderators who are volunteering their time to keep posts following on the forum during the break.


We will be making an official post with all the details on this topic soon. But I did want to post a quick update to let you know where we are on this.

Here is what we have been working on:

  1. Creating a new RMA process for Rev 10 motors.
  • With the large number of motors that are affected by this issue we needed a more efficient way to process the returns. Our new process will be more efficient for both you and our support team.
  • Our goal is to get these motors replaced and get good motors back in your hands as quickly as possible.
  • As this issue mainly affects competition teams, we are prioritizing teams in this first round of replacements.
  1. We have submitted the fix for this issue to our production team.
  • Our production team is working hard on getting as many of these new motors produced as possible.
  • We will be receiving shipments of good V5 11W motors in the coming weeks.
  1. We have created software to detect Rev 10 motors.
  • We have a V5 application that you can download directly to your V5 from here: https://v5motortest.vex.com (Chrome and Edge browsers only)
  • This application will allow you to connect 11W motors to your V5 brain and detect if they are a rev 10.
  • Of course this process will only work for motors that are still functioning. If the motor is dead you will have to identify it another way. All of this will be explained in our official post.
  • You can go ahead and use this application to start collecting any rev 10 motors and get them ready to return. When the new RMA process is announced, hopefully this will allow you to get these motors replaced quickly. Please do not try to submit your working Rev 10s for return via our normal RMA process.
  • If you don’t have enough non Rev 10 motors to replace all of the motors on your robot, be strategic as to where you use your Rev 10 motors. Any motor control group that is not using voltage commands should still be a safe place to use Rev 10 motors.

Again, there will be more details in a future post. I just wanted to make sure everyone knows that we are actively working this. Please let me know if you have any questions about the Rev 10 motor detection application. I know you will probably have a lot of questions about the return process but until it is finalized I don’t have a lot of answers for you. Once the official post is active we will post a link here.


Here is the official post about how to get rev 10 motors replaced: