Features: TB6560AHQ chip - High power, maximum 3.5A drive current chip set 1-1/16 microstep setting - Higher accuracy and smoother operation than standard 1, 1/2 step Adjustable drive current settings for each axis - 25%,50%,75%,100% of full current can be set for different stepper motors Overload, over-current and over-temperature safety - Full protection for your computer and peripheral equipment On board current switching - Power output can be set according to specific user requirement Full closed-type optical isolation to protect the user's computer and equipment Relay spindle interface - Outputs Max. 36V 7.5A for spindle motors or coolant pump (only one device can be powered by this output!) 4 channel inputs interface- Can be used for XYZ limit and emergency stop Professional design - Two stage signal processing with super anti-jamming Bipolar constant current chopper drive with non-resonant region - Controls motors smoothly through range without creep effect Four control inputs (divided into pairs of knives) - Allows setting of limit and emergency stop Universal architecture - Supports most parallel software MACH3, KCAM4, EMC2 etc! Specifications: Max. current: 3.5A Size: 18.5 x 14cm / 7.28 x 5.51in Weight: 626g Dip settings: Current Setting 1 2 Decay Mode Settings 3 4 MicroStep Settings 5 6 100% ON ON FAST ON ON 1 ON ON 75% OFF ON 25% ON OFF 1/2 ON OFF 50% ON OFF 50% OFF ON 1/8 OFF OFF 25% OFF OFF Slow OFF OFF 1/16 OFF ON Package included: 1 x Motor Driver Board 1 x cable 1 x CD 1、TB6560AHQ chip - High power, maximum 3.5A drive current chip set 2、1-1/16 microstep setting - Higher accuracy and smoother operation than standard 1, 1/2 step 3、Adjustable drive current settings for each axis - 25%,50%,75%,100% of full current can be set for different stepper motors 4、Overload, over-current and over-temperature safety - Full protection for your computer and peripheral equipment 5、On board current switching - Power output can be set according to specific user requirement