MKS SERVO28D closed-loop stepper motor has pulse interface, 485 interface, built-in efficient FOC vector algorithm, and uses high- encoder to effectively prevent motor step loss through position feedback. Suitable for small robotic arms, 3D printers, engraving machines, writers, automation products, and e-sports applications. High-speed performance is stable, running smoothly, no jitter, and can be stopped in an emergency Features: 1. Support 6 working modes: pulse interface (open loop, closed loop, FOC mode), serial interface (open loop, closed loop, FOC mode) 2. Support MODBUS-RTU communication protocol (RS485 version) 3. High-performance FOC vector control algorithm, torque, speed, position three-loop control 4. Support curve acceleration and deceleration, motor and stop are smoother 5. Support single-turn unlimited position function 6. Support multi-turn limited position and left and right limit functions 7. Support direct setting of zero point function 8. Support relative position and absolute position control mode 9. Support 1-256 arbitrary subdivision steps 10. Built-in 256-step subdivision interpolation algorithm, the motor runs super quiet and ultra-low vibration 11. Maximum input pulse frequency 160KHz, maximum speed 3000RPM+ 12. Real-time update of motor angle information (motor enabled or disabled) 13. Onboard industrial-grade high- 16384-line magnetic encoder 14. Onboard 4 high-power MOSFETs, 40V/20A 15. Built-in -485 interface, 256 slave addresses, support group address (RS485 version) 16. Maximum operating current 3.0A, MOSFET continuous operating current 20A (25℃) Color:Black Material:Plastic+Metal Package Contents: 1 * SERVO28D 485 MT Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.