Dead Zones
 

Greetings,

Can anyone tell me how to change the dead zone that exists by default? That is, I know any input between pretty much 120 and 140 is read as neutral. I don't necessarily want to remove that, but if I did, how would I do so? Also, is anyone else changing their dead zone?

Re: Dead Zones
 

The Victor's dead zone can be compensated for in code if you want. Just add 7 or so to the value you're sending to if if it's more than 127, and subtract 7 or so from the value if it's less than 127.

Re: Dead Zones
 

What is the victor's dead zone?

Re: Dead Zones
 

it may be better to expontially map the joysticks so that there is no dead zone but it is less sensitive at lower values

Re: Dead Zones
 

We use a lookup table to "curve" our drive outputs...
I don't remember the syntax for defining tables offhand; if you need it let me know and I'll look it up tomorrow.
if you put this in your code...

pwm01 = lookuptable[p1_y];

Say you've moved the joystick slightly, and p1_y = 132. This line will define pwm01 as the 133rd value in your lookup table (since lookuptable[0] is the first number in the list).
You could make that 133rd value anything you want... indeed, you could make all table values from 90 to 170 equal to 127, making a freaking huge dead zone.

Hope that helps

Re: Dead Zones
 

Yeah, we do the same thing as the guy in the above post. "Smoothed" lookup table makes the robot move nicer.

Re: Dead Zones
 

It's the range of PWM values that result in the Victor staying in "neutral". I think it's about 8 or 9 counts either side of 127. I saw it defined on the IFI web site somewhere, but I'm not sure where to find it right now.

Re: Dead Zones
 

I don't know about that. Our initial tests (just playing around with it) seemed to indicate that there was effectively no dead zone. We set ours to 15. We also used the look table, but as seen in the camera code thread, make sure that it's
and not this:

Ooops. That story didn't end well.

Paul Dennis

Re: Dead Zones
 

The main Victor page describes the deadband:
A little more detail is given in the IFI Tech Support forum.