Motor Driver: 9V-42V DC power supply, H bridge bipolar constant phase flow drive. The maximum 4.0A of the eight kinds of output current. Motor Driver: Energy-saving semi-automatic current lock function, built-in temperature protection and over current protection.The largest 32 subdivision of the 6 models are optional. : 40Ncm holding ; Rated current 1.7A and resistance 1.5ohms; 1.8 . step angle; bipolar 4-wire. Tips: make the motor connect to a constant current or chopper drive controller you test motor.Connecting the motor directly to a power supply will destroy the motor.Only the clock pulse signal can be two-phase bipolar to achieve low vibration, high efficiency work. TB6600 Driver: Single chip bipolar sine microstep driver. New BiCD 0.13 nm process.Up to 42V. 5 subdivision mode (1/1,1/2,1/4,1/8,1/16,1/32). Output current:IOUT=4.0A(,in 100ms). rated output:IOUT=3.5 A Resistance(a+)=0.4 Alarm output pin current:Ialert=1mA Monitoring output pin(MO):Imo=1mA through the ,single power supply. Built in overheating protection(TSD)circuit. Undervoltage protection,built-in(UVLO)circuit. Built-in overcurrent detection(ISD),circuit. Can control 2 phase forward and reverse rotation,With 1-2,W1 -2,2W1 -2,4W1 -2 phase excitation mode. Nema 17 : Motor type:Bipolar Stepper Phase Resistance:1.5Ohm Phase Inductance:2.8mH Detent :2.2N.cm Inertia:54g.cm2 Holding :40N.cm Step angle:1.8 Motor Weight:280g Step angle accuracy:+ -5%(full step,not load) Resistance accuracy:+ -10% Inductance accuracy:+ -20% Temperature rise:80deg Max(rated current,2 phase on) temperature:-20deg-+50deg Insulation resistance:100M Min,500VDC Insultion Strength:500VAC for one Connection:Red(A+),Green(A-),Yellow(B+),Blue(B-) colour:Black+silver Material:ABS+metal Package Contents: 1 * TB6600 Motor Driver 1 * Nema 17 Motor 1 * Mounting Bracket 4 * Screws 4 * Screws 2 * Inner Hexagon Spanner Only the above package content, other products are not included. Note: Light 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.