NEMA23 stepping motor with stepper driver/stepper controller Size 57mm stepping motor with UIrobot stepper driver or stepper controller. Nema23 size 57mm bipolar hybrid stepping motor Step Accuracy ±5% Temperature Rise 80°C Max. Ambient Temperature Range 20°C-+50°C Insulation Resistance 100MΩ Min.50V DC Dielectric Strength 500V AC 1minute UIM24204 stepper motor controller Miniature size 42*42*14mm, integrally design. 12-40VDC power supply, 4 amps driving force intelligent network programmable stepper motor controller.. Shanghai UI Robot Technology Co., Ltd Miniature size Integrated Stepper Motor Controller and Stepper Motor Driver from Shanghai