FSM620 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen FSM620 is part of the FSM Brushless Servo Motors series. It provides a continuous torque of 20.8 Nm and a peak torque of 42.4 Nm, with a nominal voltage of 230 V. The servo motor weighs 30.9 kilograms and offers an IP65 ingress rating with a seal kit.
Internal Product Review
The FSM620 is a Kollmorgen brushless servo motor with a 230 V nominal rating and 20.8 Nm continuous torque. Peak output reaches 42.4 Nm, while the 2000 quadrature pulse encoder supports precise feedback for controlled servo performance. IP65 protection with the seal kit makes the FSM620 an excellent choice for demanding motion systems.
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Product Description:
The FSM620 is a brushless servo motor built by Kollmorgen within the FSM Brushless Servo Motors series. Designed for closed-loop motion systems, the unit converts electrical power into precisely controlled rotary torque, enabling coordinated positioning and speed regulation in packaging machines, gantries, and other industrial axes. Its electromagnetic design pairs rare-earth magnets with balanced windings, making it suitable for high-cycle servo loops found in automated assembly lines.
The motor delivers a continuous shaft output of 20.8 Nm, allowing sustained load support without overheating, while its overload capacity peaks at 42.4 Nm for transient acceleration or startup events. A torque constant of 0.70 Nm/A relates phase current directly to produced torque, simplifying current-loop tuning. The stator is wound for a nominal bus voltage of 230 V, and its 1.7 mH phase inductance together with 0.26 Ω resistance establishes electrical time constants that influence drive bandwidth. An internal thermal switch opens the control circuitry if the winding temperature rises beyond safe limits. The housing measures 320 mm from end to end, and the optional brake increases the overall length to 390 mm when installed.
Position feedback comes from an optical encoder that yields 2000 quadrature pulses per revolution, providing 8000 counts after x4 decoding for fine velocity and position resolution. Dynamic response is aided by a rotor inertia of 0.01073 kg-m², which balances load matching with rapid acceleration. With a mass of 30.9 kg, the frame provides rigid mounting and useful thermal mass. The motor achieves IP65 sealing with a seal kit, blocking dust ingress and low-pressure water jets when the shaft seal kit is used. A back electromotive force constant of 85 V/kRPM supports drive voltage scaling so that generated voltage stays within inverter limits during high-speed operation.
