Mecanum wheels programming

Yahya_Gilany · January 16, 2011, 1:21pm

Does any one have a working example on how to program a mecanum wheels to move side by side using LabView, please ??

Thanks!!

Ether · January 16, 2011, 1:32pm

There’s a vi for that.

Holonomic vi

The “Y” input to the vi is for forward/reverse motion.

The “X” input to the vi is for strafe right/left (sideways) motion.

The “Rotation” input to the vi is for turning (yaw).

To take advantage of all three possible motions, you will need to provide those 3 inputs to the vi, so you will need a 3-axis joystick or two 2-axis joysticks or some other scheme.

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Yahya_Gilany · January 16, 2011, 1:44pm

thanks a lot . does that works with 4 wheels that all in the same direction !! ( forward\ reverse) ??
I thought we might need 2 wheels going ( forward ) and the other 2 ( reverse ) so that it moves side by side !

Ether · January 16, 2011, 1:52pm

I’m not sure what you mean by the above, but there IS a right way and a wrong way to mount the mecanum wheels.

Take a look at this thread. The “X” and “O” mentioned in the post is the visual appearance of the mecanum rollers. The wheels themselves should all be aligned parallel to the robot’s fore/aft axis.

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system · January 19, 2011, 3:31pm

Ok I am very new, and this may be a stupid question but where is the “Holonomic vi” I can not find it and non of the team is really great with LabView yet.

Thanks Jeff

Alan_Anderson · January 19, 2011, 4:06pm

At the bottom of the functions palette is the “WPI Robotics Library”.
The first thing in the WPI Robotics Library is “RobotDrive”.
You’ll find the Holonomic Drive vi right next to Tank Drive and Arcade Drive.

BenGrapevine · January 19, 2011, 5:34pm

My team has decided on Mecanum wheels, and I still can’t find the “WPI Robotics Library”.

This is what I did, correct me if I’m wrong, PLEASE!

Open LABVIEW 2011
Go up to the “tools” bar
?? (Where do I find the “WPI Robotics Library”?)
Holonomic Drive VI
Profits

system · January 19, 2011, 6:05pm

Thanks everyone, you all are very helpful.

Alan_Anderson · January 19, 2011, 10:28pm

I meant “functions palette”, not “tool palette”. Sorry about that.

You can open the function palette by right-clicking on a blank spot in the block diagram, or by choosing “Functions Palette” from the View menu.

BenGrapevine · January 20, 2011, 5:01pm

Forget my comment, I learned how to make mecanum from scratch.