Product Description:

The KA404XXX is a brushless servo motor produced by Sanyo Denki for the K SANMOTION Servo Motors series. The unit supplies closed-loop rotary motion in compact axes such as semiconductor handlers and miniature actuators. It converts drive commands from a matching amplifier into precise shaft rotation, delivering the feedback and response required for automated positioning tasks in light industrial machinery. With a square 42 mm frame and low rotor inertia, the motor fits applications where space and moment loads are restricted while still maintaining controllable acceleration profiles.

It reaches its nominal operating point with a supply of 72 V, at which the windings draw a rated current of 0.9 A. Under these electrical conditions, the shaft delivers 40 W of mechanical power while turning at 3000 rpm. The continuous shaft torque at that speed is 0.13 N·m, and the torque constant is 0.174 N·m/A. An armature resistance of 16.8 Ω limits steady-state copper loss, while the 7.6 mH inductance filters current ripple generated by the pulse-width-modulated drive. These electrical values support controller tuning and thermal calculations for continuous operation.

The motor provides a peak stall torque of 0.76 N·m for rapid acceleration before thermal limits intervene. Its maximum no-load speed reaches 5000 rpm, and the rotor can settle to a commanded velocity within a mechanical time constant of 4.7 ms. The low rotating inertia of 0.084 × 10⁻⁴ kg·m² supports responsive motion in axes that require frequent speed changes. The voltage constant is 18.2 × 10⁻³ V per rpm, supporting back-electromotive-force calculations across the operating range. Continuous stall torque is 0.14 N·m, providing usable torque while the shaft is stationary. The motor weighs 0.40 kg and attaches through a 42 mm square flange, allowing installation in densely arranged multi-axis equipment.