Vexiq arcade drive squared inputs

[jreneew2]

Does anyone know if the vexiq (robotmesh) arcade drive function square the joystick inputs automatically, or is that handled by the user?

Thanks,
Drew

[sankeydd]

I have heard that some people do this, but I don’t think it is the default behavior. I think it’s a good idea, though.

[calvc01]

Could someone explain that to me? So if you push the joystick forward 50% and left or right 0%, the robot should go forward at 50% speed. Wouldn’t squaring it make it 100% at the halfway point?

[rhowbot]

@calvc01

explain that to me

This thread, and links…

Slowing Down V5 Motors

Usually its cubic. Here is a graph of joystick cubed vs joystick itself. [image] Someone asked for this on facebook, here is my response from there.

Like this:

Guide to Exponential Drive Function

I am not sure if you have seen the threads talking about using a cubic for this purpose. Here is my reply on another thread explaining it https://www.vexforum.com/t/slowing-down-v5-motors/51787/3?u=tabor473 Your method seems to work and give reasonable results, it does seem however significantly more complicated and require different math for positive vs negative controller values. Graphically the difference seems pretty insignificant. [image] graph source

[sankeydd]

I would do it this way… So if you move the sticks halfway the motors only go at 25%. It was give you much finer control over the slower movements, but if you move the sticks to the edge you can still get 100% out of the motors.

To make sure that both ends wouldn’t be positive, just multiply the % by the abs value of the % to preserve the direction.