SERVO42B closed loop stepper motor Features The circuit board and the stepper motor pitch are installed and debugged and plug and play. High-speed printing no skips, low heat, high efficiency and more stability. With the SMT32 chip, the frequency is higher and the processing speed is faster. The structure is simple and easy to install. ¶ Technical specifications Item type: 3D printer accessories Input voltage: 12 V - 24 V  Closed loop feedback frequency: 6 kHz Accuracy: greater than 0.1125 degrees Subdivision steps: 16, 32, 64, 128, 256 (default is of 16 subdivisions)