Calculate Speed with encoder


I have a 70:1 Metal Gearmotor 37Dx70L mm with 64 CPR Encoder (Spur Pinion) and I am unsure how to tackle speed calculations. How would i approach it? So far i’ve connected both of the encoders and I can use the encoder library By Samuel S. to count. However, i only get around 450 per full rotation, which doesnt make sense as i would be expecting 4480 . Is there any example i could see?

Sorry for the newbie question.
Thank you for your help in advance!


I am not familiar with the encoder library you are using. Could you give me a little more information on that? You could consider using the Encoder library by Paul Stoffregen as an alternative, as we have generally had good results with it.


After switching ive started to get good result with Paul’s library! Thank you. I am now able to calculate the speed but my question now is how to inverse it. E.g send via serial the desired speed in m/s and it to translate to power in the motors. I am using the DualVNH motor shield.

I’m aware it might be late :slight_smile:, but can you please share your working method for speed measurement?
Thank you!