Gyro Questions

[Bryan Herbst]

You have to do it manually, and you probably should.

From the sensor manual-

The ADW22307 has an integrated temperature sensor to assist in temperature compensation. Nominal output is 2.5V at 25°C plus 9mV/°C.

So that means that depending on your workspace, temperature could definitely skew things. Plus, arenas such as the ones we find at competition are typically chilly, so you will likely find different gyro readings at competition than at your workplace.

[Joe Ross]

Originally Posted by Tanis

So that means that depending on your workspace, temperature could definitely skew things. Plus, arenas such as the ones we find at competition are typically chilly, so you will likely find different gyro readings at competition than at your workplace.

The WPI Robotics Library Gyro routines automatically accumulates the gyro value for a period of several seconds on startup. The rate changes from then on are referenced to this initial baseline value. You only have to worry about temperature compensation if you expect large temperature changes during a single match.

It doesn't matter if the temperature changes between your workspace and the competition as long as the robot is power cycled between those two places.

[Alan Anderson]

Originally Posted by Joe Ross

You only have to worry about temperature compensation if you expect large temperature changes during a single match.

Thus it would be a good idea not to mount the sensor too close to a source of heat (e.g. a motor).

[Bryan Herbst]

Originally Posted by Joe Ross

The WPI Robotics Library Gyro routines automatically accumulates the gyro value for a period of several seconds on startup. The rate changes from then on are referenced to this initial baseline value. You only have to worry about temperature compensation if you expect large temperature changes during a single match.

It doesn't matter if the temperature changes between your workspace and the competition as long as the robot is power cycled between those two places.

Ahh, that makes our job easier overall.
However, we are having issues with the gyro not outputting correctly, and we assumed that it had to do with the temperature. Guess its back to troubleshooting. Thanks for the info though!