Gyro angle will not work with robot code
 

I am trying to get an angle from the gyro and I am able to get the sample code to work. But when I try to use the sample code on the robot code it just outputs a constantly increasing number from 0-360. I attached the code below. Can anyone tell me why this is happening?

Re: Gyro angle will not work with robot code
 

You didn't set the gyro gain. Try this:

Re: Gyro angle will not work with robot code
 

I copied your code and it is still constantly increase but this time by a smaller number.

Re: Gyro angle will not work with robot code
 

The spec sheet for the gyro you are using should list a value for "voltage per degree of rotation per second", use the value they list for the gain.

When the cRIO is first booted, you know you must not touch the robot while the gyro initializes?
That's how it decides what zero is.

Re: Gyro angle will not work with robot code
 

How small? Is it of the order of 1 degree every 2 minutes or so? If so, that would be normal drift for KoP gyro.

Re: Gyro angle will not work with robot code
 

It is to the forth decimal place and moving the gyro doesn't do anything.

Re: Gyro angle will not work with robot code
 

Post a photo of how you have it wired. Show both the gyro end and the other end of the cable. Please use the macro setting on your camera for close-ups.

Re: Gyro angle will not work with robot code
 

I can't take a picture of it until tonight. However, I know the wiring is correct because I loaded the sample code on the robot and it ran fine and gave me the angles I wanted.

Re: Gyro angle will not work with robot code
 

We should have asked you right at the start what was your intended use for the gyro.

I just saw on another thread that you are intending to use the gyro for your shooter altitude angle.

I think you want a potentiometer or encoder instead.

Re: Gyro angle will not work with robot code
 

I think an encoder would work best. I don't think a potentiometer came in the KOP. Do you have an idea of what would be best for a shooter that is going to only moving up and down in a range of 70 degrees?

Re: Gyro angle will not work with robot code
 

That's a great application for a potentiometer. An encoder would also work.

Re: Gyro angle will not work with robot code
 

I don't think I have potentiometer but I can play with an encoder.

Re: Gyro angle will not work with robot code
 

You must have a Radio Shack or Fry's somewhere near you. Get a 5K or 10K Linear Taper Potentiometer. They're cheap and easy to wire up and get working.

Re: Gyro angle will not work with robot code
 

We have seen the constantly increasing gyro behavior which seems to be due to bad connections. Check that the connection to the analog board and the gyro itself are solid and don't have any wire "hairs" shorting. Also, as mentioned, check the datasheet for the gain. Our gyro (I think this year or last year KOP) has a gain of 0.007 instead of the 0.0125 of the examples.

Re: Gyro angle will not work with robot code
 

http://www.chiefdelphi.com/forums/sh...42#post1239642

Please see this post, and see if this explains the issue.