This article provides an in-depth comparison between Direct Drive (DD) motors and harmonic rotary actuators, covering their transmission principles, advantages and disadvantages, and typical application fields.

A dental milling machine is a CNC machining system used to directly process digital dental models into restorations such as crowns, bridges, veneers, inlays, and implant abutments. Dental milling machines require far higher operational accuracy and motion stability than ordinary equipment. This article explains how harmonic drive gear help dental milling machines achieve stable, continuous, and controllable operation.

Learn how to choose the right CNC rotary table transmission based on accuracy, backlash, torque, speed, rigidity, thermal stability and integration. Compare harmonic reducers, harmonic rotary actuators, DD motors, RV reducers and planetary reducers.

Learn how to adjust PID parameters on the HPJM harmonic joint actuator to reduce positioning jitter and improve motion stability using CAN, CANopen, or EtherCAT.