Setting up AIM string pot for steering angle

[eboucher]

Hey all,

Finished up with my FE2 build and for the most part I’ve got the data system working as it should be. It’s an AIM EVO4S. The one channel I’m still struggling to setup is steering angle. I went with the string pot to make installation a bit easier and so I didn’t have to deal with belt slippage. I assumed there’d be some sort of calibration utility where I could set full left lock, full right lock, and center but I’m not finding anything like that in Race Studio 3.

The sensor is mounted to the left of the column so it’s setup such that its maximum length is reached at full right lock and it’s minimum length is at full left lock. In the channel setup I’ve got the “Steering Pos” function selected for the channel, along with “Angular Pot. AutoCal” for Sensor and 100Hz for Sampling Frequency. Total potentiometer travel is set at 180 which is the default setting.

Any help/advice would be appreciated on how to get this sensor properly calibrated to show my correct steering angle. I’ve been unable to find any documentation on the string pot on the AIM website or on their YouTube channel.

Thanks,
Eric

[David Ferguson]

Wow, your AiM Dealer really left you out in the cold . You shouldn't use autocal, type, you should use Angular Pot, Calib for the sensor field. Now you will have the chance to set the range, and left / right values.

[eboucher]

Wow, your AiM Dealer really left you out in the cold . You shouldn't use autocal, type, you should use Angular Pot, Calib for the sensor field. Now you will have the chance to set the range, and left / right values.

LOL! Thanks Dave. Just PM’d you.
Eric

[romoman]

100 Hz is really fast for that channel. I go 50 and it's faster than most set it. 25 Hz works well and matches the newest GPS 09 if you have a little OCD.

Note that the calibration numbers you use are for the data points, not the range the sensor will read. I always go 90 or 180 degrees so it's easy to calibrate. You can then do the math to figure out the wheel position.

[eboucher]

100 Hz is really fast for that channel. I go 50 and it's faster than most set it. 25 Hz works well and matches the newest GPS 09 if you have a little OCD.

Note that the calibration numbers you use are for the data points, not the range the sensor will read. I always go 90 or 180 degrees so it's easy to calibrate. You can then do the math to figure out the wheel position.

Thanks. Dave sent me the calibration procedure so between that and this info I should be good to go.