1 PC stepper motor with 3N.M=425OZ-IN   112MM body length, 8mm single round shaft

1 PC matching driver DQ542MA   input 18-50V   4.2A

 1, Stepper MotorElectrical Specifications ：

Model	Step angle ( °)	Motor Length L(mm)	Rate Voltage (V)	Rate Current (A)	Phase Resistance (Ω)	Phase Inductance (mH)	Holding Torque (kg.cm)	Lead Wire (NO.)	Rotor  Inertia (g.cm2)	Motor Weight (kg)
WT57STH115-4204A	1.8	112	3.78	4.2	2.1	9	30	4	800	1.9

Black       A+

Green      A-

Red          B+

Blue         B-

2, Stepper Motor Driver with 4.2A Current, DQ542MA

Introduction:

DQ542MA is a type  of two-phase hybrid stepping motor driver, the drive voltage of it is from 18VDC to 50VDC. It is designed for use with 2-phase hybrid stepper motor of all kinds with 42mm to 86mm outside diameter and less than 4.0A phase current. This circuit that it adopts is smiliar to the circuit of servo control which enables the motor run smoothly almost without noise and vibration. Holding torque when DQ542MA run under high speed is also significantly higher than the other two-phase driver, what’s more, the positioning accuracy is also higher. It is widely used in middle and big size numerical control devices such as curving machine, CNC machine, and computer embroider machine, packing machines and so on.

Features:

l        High performance, low price

l        Average current control, 2-phase sinusoidal output current drive

l        Supply voltage from 18VDC to 50VDC

l        Opto-isolated signal I/O

l        Overvoltage, under voltage, overcurrent, phase short circuit protectio

l        15 channels subdivision and automatic idle-current reduction

l        8 channels output phase current setting

l        Offline command input terminal

l        Motor torque is related to speed, but not related to step/revolution

l        High start speed

l        High hording torque under high speed

Electrical specification:

Connector Pins  Configurations

Function choice ( Using DIP pins to achieve this function)

1) Micro step resolution is set by SW 5,6,7,8 of the DIP switch as shown in the following table:

2) Standstill current setting

SW4 is used for this purpose. OFF meaning that the standstill current is set to be half of the selected dynamic current and ON meaning that standstill is set to be the same as the selected dynamic current.

3) Output current setting:

The first three bits (SW 1, 2, 3)of the DIP switch are used to set the dynamic current. Select a setting

Closest to your motor’s required current

4) Semi-flow  function:

Semi-flow function is that there is not step pulse after 500 ms, the driver output current automatically reduced to 70% of rated output current, which is used to prevent motor heat.

 Pins of motor & power: