Hi dk,
I’m an applications engineer with Teknic and came across your post. The ClearPath motors are integrated servo systems meaning the servo motor, servo drive and encoder all come in one single housing so no external servo drive is necessary. I am not familiar with Duet’s products but after a little research, it appears that Teknic’s ClearPath “SD” (step/dir) servo motors would be a good fit (as some in this forum have already suggested). The “SD” models (SDSK and SDHP) need step and direction command inputs (along with an enable input and a high level feedback output).
The following link on the Duet3D site offered some good information in this regard: https://duet3d.dozuki.com/Wiki/Using_external_stepper_motor_drivers))
Note that the ClearPath inputs require 7mA at 5V (3.3V is not enough) so you'll need to use the Duet expansion board. If you have any other questions please feel free to email us at support@teknic.com.
Sincerely,
AbeA