Absolute position control

I am using a brush motor to control a steering mechanism that has continuous rotation. I can place an absolute encoder on the output shaft and would like to perform absolute position control, i.e. go to a setpoint angle 0-360 degrees.

One option would be to use an incremental encoder like is supported by most Roboteq controllers and then have to home the system on startup or periodically.

However I would prefer to use an absolute encoder with an SSI or SPI interface like: www.cui.com/product/resource/amt20.pdf or www.rls.si/en/rm08-super-small-non-contact-rotary-encoder

I also see that there are some controllers with resolver inputs, but I think these are all for brushless motors.

Does Roboteq have a solution for DC brush motor position control with some kind of absolute encoder?

Unfortunately we currently only have SSI support in our brushless firmware since the original intention was to support SSI in order to provide feedback for sinusoidal commutation. We are currently working to expand SSI support through our IO port to all of our controllers in order to use it as position feedback. If you email This email address is being protected from spambots. You need JavaScript enabled to view it. we can notify you when there is an experimental version of firmware that does this on brushed controllers, however currently this feature is not part of our released firmware.