[Ether]

Originally Posted by ~Cory~

We started to look into this. After about an hour we came up with a few tests. We have an average of +- 18.2 rpm change from the target rpm.


Raw data is in this white paper:
http://www.chiefdelphi.com/media/papers/2667

Thank you for posting the data.

Would you mind posting the following additional information please?

- what motor(s)

- total gear ratio from motor to wheel(s).

- what type and diameter wheel(s)?

- Jag or Vic?

- coast or brake mode?

- voltage ramp rate? symmetric or up only?

- what encoder model, and where mounted

- what language

- 1x 2x or 4x decoding?

- Counter or Encoder class?

- to measure RPM, are you measuring the time between consecutive counts, or are you dividing the counts by the delta time?

- if dividing counts by delta time (see above item), how are you computing the delta time

- encoder signal not filtered?

- what execution cycle update rate?

PS: You have some interesting noise on your sensor signal. Look at cells B57 & B58 for example.