Closed loop steppermotors

Such a system combines the advantages of stepper- and servomotors: high torque and high dynamics. Typical applications are in the area of "short strike, high hit rate".
Basically these are stepper motors with built-in encoder.

Characteristics: flange size: 28 - 42 of 60 mm resolutieon: upto 12.800 steps/revolution. torque: 0,036 - 1,2 Nm Ethercat-driver possible 4-axes driver available

http://products.sanyodenki.com/en/sanmotion/stepping/pb/