product description: The SERVO42C closed-loop motor is a product independently developed by the Maker Base to meet market demand. The closed-loop motor feeds back the rotation angle of the stepper motor to circuit to detect whether every step that should be taken is taken, in order to prevent missing steps.If a lost step occurs and the loop is closed, the motor will make up for it through the feedback information. When a step is lost, the blue LED light on the closed-loop module will light up (the blue LED light is the lost step indicator light). It is suitable for 3D printer manufacturers with high mass production accuracy requirements.Product features: 1. Support FOC vector control, three-loop control of torque, speed and position.2. Supports direct serial port control, reading position and status, and setting system parameters.3. Supports one-click setting of system parameters on the screen and automatic saving, which can completely the host computer.4. Power-on self-test, automatically identify some parameters, automatically determine some error conditions and prompt.5. Use 8 high-quality MOS tubes to form a double H-bridge driver, making the motor control smoother.6. The onboard industrial-grade high-precision 16384 linear magnetic encoder is used to enable precise positioning of every step.7. Supports any subdivision from 1 to 256, even odd subdivisions (such as 1l subdivision) are also possible.8. Supports 42 stepper motors with any length of 0.9and 1.8.9. The maximum printing speed can reach 150-180mm/s.type: B-Without MotorMaterial: abscolour: As ShownPackage Contents: 1 x Motor drive setOnly 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.