VEX GO 'Crazy' motor behaviour

Programming Support
1

Hello!

We have a huge problem with using the VEX Go motors with our android tablets. Basically at random points during code execution (after a motor movement is completed) the motor will start spinning at full speed (much faster than the normal 100% speed) for 2 seconds. Here are the details:

  1. The problem occurs with a simple program i.e. a simple loop that turns the motor some degrees and then pauses before doing the same again so a coding problem is very unlikely.
  2. It happens on all motors on all our 5 VEX GO sets, across all brain and motor combinations.
  3. It happens when we use our Android tablets but NOT with a laptop (unfortunately at the school we only have tablets)
  4. It happens consistently on every 4 to 5 movement (if I remove the pause then even more)
  5. It always seems to happen at the end of a motor movement
  6. The motor will spin at maximum speed in the opposite direction of the previous movement for roughly 2 seconds

I have attached a short video where you can see this more clearly.

https://vimeo.com/831133518?share=copy

Any help would be much appreciated, it’s really stopping us form fully using the kits.

Thanks,
Michael

2

MikeP,

What are the specifications of the Android tablets? What OS version are they running on?

Thanks,
Mike

2 Likes
3

Hi Mike,

Thanks for the reply. The Tablets are Lenovo Tab M10 (3rd Gen) Android Tablets (OctaCore, 3GB RAM, 32GB eMCP). Android is Version 11. I also have an older tablet with Android 10 and the behaviour is the same.

Thanks,
Michael