R911260850 (MDD090C-N-030-N2M-110GA0)

Omitting the brake reduces cost, size, maintenance needs, and inertia, useful when external locking or fail-safe holds aren’t needed. But you lose automatic mechanical hold when power is off, so a brake may be added externally if required.

Lower rotor inertia enables faster acceleration and deceleration, improving responsiveness and reducing overshoot; higher inertia smooths motion but slows dynamics. Matching motor inertia to the load inertia (ideally a 1:1 to 3:1 ratio) yields optimal control stability.

If ambient temperature exceeds nominal or elevation is high, the motor’s cooling capacity decreases, forcing derating of torque to prevent overheating. The motor must be derated or supplemented with better cooling at extreme conditions.

DSF typically communicates via a serial/digital protocol (e.g. BiSS, Hiperface, or proprietary Rexroth interface), enabling high-speed position/velocity/diagnostic exchange. The drive must support compatible feedback protocol to fully exploit the motor’s features.

You must avoid excited mechanical resonances in your machine’s structure near the motor’s operating frequencies (especially at low orders) by checking structural modes and applying notch filters if needed. Closed-loop tuning should include identification of resonance peaks to suppress oscillations.