The modular design of the BX4 Series of brushless dc servomotors eliminates the need for adhesive-bonded joints. A new four-pole concept ensures a 12.2-mNm continuous torque, with a flat gradient of the n/M characteristic curve. Features include smooth running, low noise, and electronic commutation. In the basic version, the commutation is via an external control. The flexible motor concept of the BX4 Series offers versions with an integrated speed controller or integrated encoder. The encoder version comes in four different preset resolutions: 32, 64, 128, or 256 quadrature impulses/rev.