Questions about mecanum wheels

[byteit101]

the WPILib Joystick class has a GetDirectionDegrees and GetDirectionRadians, I'm sure Labview has something similar

[Todd]

the WPILib Joystick class has a GetDirectionDegrees and GetDirectionRadians, I'm sure Labview has something similar

Actually it unfortunately doesn't (At least as far as we can tell). We also had to do the conversion from X/Y axis to direction/magnitude.

When we push the main joystick full forward, and give the holonomicdrive.vi the equivalent of 1 magnitude, 0 heading, and 0 rotation, the motors all go in the same direction but at about ~70% power.

This is also true and is how the holonomic vi is coded.

If you want to change it so that your motors are running at full power I'd advise making a copy of the holonomic vi and reworking the math inside of it to your liking.

[willson.thomas]

I don't know how you are doing your direction and magnitude calculations but in LabVIEW, we used the ATAN2 function for direction which takes the joystick x and y as inputs. While you still have to do Radian-Degree conversions, I believe this will handle the Quadrant issues for you. Then, for the magnitude, we simply did sqrt(x^2+y^2).

[Joe Ross]

In LabVIEW, you can also use "Re/Im To Polar Function".

[Tom Line]

Originally Posted by Todd

Actually it unfortunately doesn't (At least as far as we can tell). We also had to do the conversion from X/Y axis to direction/magnitude.

This is also true and is how the holonomic vi is coded.

If you want to change it so that your motors are running at full power I'd advise making a copy of the holonomic vi and reworking the math inside of it to your liking.

Actually, labview DOES have this function in an easy-to-use VI that can output degrees and magnitude from your joystick direction.

Edit: Doh, Joe beat me to it. That's what I get for leaving the window open while I go out to a machine breakdown