Idk if this has been an issue with other peoples block Code, but our chassis does not change velocity. We tested a lot of different solutions but the only one that worked was when we set our chassis motors to motor “groups” instead of in a “chassis” groups. We even tried to change the velocity when …

It would be helpful if you would post your code. Thanks!

[Screenshot 2025-12-10 12.34.31 PM]

For clarification, are you running 4 or 6 motor drive, because if you’re running 4 you do not need to go through all of this work.

We do run 4 motor, but it doesn’t work with just a “set drive velo” block. We have tried a bunch of iterations of different ways to change to velocity, and the the only way it changed was when they were in a motor group.

you need some spin commands, “set drive velocity” will not change motor speed if it is stopped only if the motor is already moving

I remember thinking this was confusing as a middle schooler, since if you’re just looking at the block names, “set drive velocity” sounds like a state machine setter to a variable that controls a desired speed to be maintained. At the time I thought “set max drive velocity” would be nicer but I’m no…

I’m not a fan of “set velocity”, IMHO it should never be used in non-block code, but history and other factors forced it’s use in blocks. [image] Competition code - common mistakes VEX V5 Technical Support Ok, last one I can think of for today. motor setVelocity is evil……

You should use set drive voltage instead of velocity. we had this problem in our last comp as well. Lmk if it fixed it

[image] monty012z: set drive voltage IIRC there is no “set drive voltage” block, in fact, I believe VEXcode drivetrain doesn’t use voltage at all anywhere.

Chassis Not Changing Velocity In Block Code

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jpearman December 11, 2025, 7:57pm 8

I’m not a fan of “set velocity”, IMHO it should never be used in non-block code, but history and other factors forced it’s use in blocks.