DR-Series vs DM-Series
The Dynaservs come in two different series: the DR-Series and the DM-Series.
The DR-Series utilizes a Resolver for feedback while the DM-Series uses an Encoder.
DR-SERIES
The resolver is more rugged than the encoder and it is less expensive. However, it also provides a lower resolution.
DM-SERIES
The encoder provides a higher resolution, but it is more expensive.