Problems driving straight.

[Racer26]

Originally Posted by seg9585

I'm going to say the robot will veer to the right. Even when driving straight the mecanums should inevitably experience a little bit of slip with rollers. Preventing the rollers from moving will prevent this slip, so you effectively get more forward movement per wheel rotation on the left compared to the right.

I'm envisioning a person walking on an inclined sidewalk which is half covered in snow, and half dry. One foot on the pavement, the other in the snow. The foot in snow will "slip" back a bit with every step, but the foot on pavement gives you the full stride.

I'd be inclined to agree. I could also see a possibility for a performance difference between hard floors like tile or concrete and softer ones like carpet. I would think the locked roller side would get even more traction on carpet than on the hard floor and make the effect even more pronounced.