Ultra quiet stepper motor Drivers LV8729 High Quality Compatible and replaces the well known A4988 and DRV8825 stepper motor drivers More silent and smooth than a A4988 Can reach up to 1/128th micro stepings Compatible with most standard controler boards Ideal for 3D printers, CNC, laser cutters, Hot wire machines Specifications: Input voltage: 6-36V Max current: 1.5A Micro Stepping: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128 Heat sink included Recommandations: Make sure to properly cool down the driver while in use. Table de configuration des micros pas: Micro stepping M1 M2 M3 1 full step 0 0 0 1/2 step 1 0 0 1/4 step 0 1 0 1/8 step 1 1 0 1/16 step 0 0 1 1/32 step 1 0 1 1/64 step 0 1 1 1/128 step 1 1 1 Curent calibration with voltmeter The driver calibration is to be made ideally using a voltmeter Use the 2VDC caliber (or something close) on your multimeter. The voltages we are going to read are below 1V The following formula is to be applied IMotor= Vref * 2 for RS= 0.1ohm Here is a simple table with all the common values Vref I Motor 0.1V 0.2 A 0.15V 0.3 A 0.20V 0.4 A 0.25V 0.5 A 0.30V 0.6 A 0.35V 0.7 A 0.40V 0.8 A 0.45V 0.9 A 0.50V 1 A 0.55V 1.1 A 0.60V 1.2 A 0.65V 1.3 A 0.70V 1.4 A 0.75V 1.5 A