935 as of last night

[railerobotics]

This is RaileRobotics prototype mecanum chassis as of last night.

[Chuck Glick]

Originally Posted by railerobotics

This is RaileRobotics prototype mecanum chassis as of last night.

all I can say is WOW. There seem to be many teams trying out this mecanum chassis!

Looks good, have any other pics, like closer up, the mecanum modules, and maybe some video?

[Dan Petrovic]

*wipes a tear from eye*

It's beautiful...

[Chuck Glick]

how well does it drive?

[Jonathan Norris]

That is beautiful, I hope it runs as good as it looks. I hope we get a game this year that will better take advantage of these types of these very maneuverable drive systems.

[Billfred]

Beautiful.

Would you run it like that, or would there be some protective frame around it? (Or bumpers, even?)

[Dan Petrovic]

I'd hate to burst your bubble, but are those mecanums in the wrong position?

I think the wheels need to be switched front to back or left to right.

I may be wrong, though.

[Madison]

Originally Posted by InfernoX14

I'd hate to burst your bubble, but are those mecanums in the wrong position?

I think the wheels need to be switched front to back or left to right.

I may be wrong, though.

It'll work as pictured, but I agree that the wheels are backward (or upside down) and should be rearranged.

We didn't quite understand the importance of how the wheels were arranged until we made the same mistake ourselves. It became obvious pretty quickly.

[railerobotics]

Originally Posted by InfernoX14

I'd hate to burst your bubble, but are those mecanums in the wrong position?

I think the wheels need to be switched front to back or left to right.

I may be wrong, though.

The side the wheels are on is irrelevant as long as the angle of the rollers is different from left to right and front to back. In other words the rollers either need to point in or out but not both left or both right.

If the wheels were to be switched from the current position then it would require the oppisite input to strafe left or right.

[Madison]

Originally Posted by railerobotics

The side the wheels are on is irrelevant as long as the angle of the rollers is different from left to right and front to back. In other words the rollers either need to point in or out but not both left or both right.

If the wheels were to be switched from the current position then it would require the oppisite input to strafe left or right.

Actually, the position of the wheels is quite relevant to how the chassis will perform on the field.

As your wheels are arranged currently, it's possible to rotate your robot in place while under no power. During a match, a competing robot could push you at the corner, causing your robot to spin in the same manner. There's no way to apply power to oppose that motion.

[Dan Petrovic]

Originally Posted by M. Krass

As your wheels are arranged currently, it's possible to rotate your robot in place while under no power. During a match, a competing robot could push you at the corner, causing your robot to spin in the same manner. There's no way to apply power to oppose that motion.

Also, it seems like it wont rotate as well when the wheels are being driven.

[railerobotics]

Originally Posted by SirCharles982

how well does it drive?

It drives much as a Mecanum should, albeit it does have a tendency to drift around the floor. This is mostly due to the fact that the robot weighs less than 50 pounds and we have been driving on polished concrete.

[railerobotics]

Originally Posted by M. Krass

Actually, the position of the wheels is quite relevant to how the chassis will perform on the field.

As your wheels are arranged currently, it's possible to rotate your robot in place while under no power. During a match, a competing robot could push you at the corner, causing your robot to spin in the same manner. There's no way to apply power to oppose that motion.

Thank you very much for your input. Does this look better.

[Madison]

Originally Posted by railerobotics

Thank you very much for your input. Does this look better.

Yep, that'll do it.

Did you switch them just now?

[railerobotics]

Originally Posted by M. Krass

Yep, that'll do it.

Did you switch them just now?

Yes we did change them now. It took us less than 5 minutes to change our wheels. We pull out the side bearings and the drive shafts and can switch the wheels from the bottom of the chassis.