MC425-Mini Two-Phase 42 Stepper Driver

Product Overview

MC425-Mini digital low-voltage stepper motor driver uses the latest ARM chip technology, compatible with two-phase 35, 39, and 42 series stepper motors, featuring excellent medium and low-speed performance. It allows setting any microstepping between 400 and 6400 and any current value within the rated current, meeting the application needs of most small devices. It employs built-in microstepping technology, achieving high microstepping effects even under low microstepping conditions, ensuring smooth operation at medium and low speeds with very low motor noise.

Features

Voltage input range: DC18V~36V Maximum peak current: 2.5A Subdivision range: 400~6400ppr Pulse form: Pulse + Direction Pulse response frequency: 0~200KHz Motor parameter auto-tuning function With overvoltage, overcurrent, tracking error overrun and other protection functions.

Product Overview Supporting Products Data Download

Driver Function Description

Driver Functions	Functions	Definition
POW	Power Indicator Light	The green light is the power indicator light, which stays on when the driver is powered on.
ALM	Fault Indicator Light	The red light is the fault indicator light, which stays on when under-voltage, over-voltage, or over-current faults occur.
PUL	Negative terminal for receiving pulse control signals	Used to control motor positioning; active low; the motor moves one step when the pulse changes from high to low.
DIR	Negative terminal for receiving direction control signals	Used to control the motor rotation direction.
OPTO	Common positive terminal for PUL/DIR/ENA	Connects to external power positive terminal, supports 5V~24V power supply without series resistor.
ENA	Negative terminal for receiving enable control signals	When enabled (low level), it disables motor enable, allowing the motor shaft to be free.
GND	Power negative terminal	Powered by DC power supply, operating input voltage range: 18V~36VDC, recommended operating voltage 24VDC.
+VDC	Power positive terminal
A+, A-	Motor power lines	A+ and A- connect to the positive and negative ends of the motor A-phase winding; B+ and B- connect to the positive and negative ends of the motor B-phase winding. Swapping A and B phase windings reverses the motor direction.
B+, B-

Product Diagram

Parameter Settings

The MC425-Mini driver uses a 6-position DIP switch to set microstepping resolution, dynamic current, and half/full current, described in detail as follows:

Operating Current Setting

Output Peak Current	SW1	SW2	SW3
0.5A	on	on	on
0.7A	off	on	on
1.0A	on	off	on
1.3A	off	off	on
1.6A	on	on	off
1.9A	off	on	off
2.2A	on	off	off
2.5A	off	off	off

Automatic Half-Current Function

Setting SW4 to OFF means the static current is set to half of the dynamic current; ON means static current equals dynamic current. Generally, SW4 should be set to OFF to reduce motor and driver heating and improve reliability. After pulse stops, current automatically reduces by about 50% (actual 55%) after approximately 0.3 seconds, theoretically reducing heat generation by 65%.

Microstepping Setting

Steps per Revolution	SW5	SW6
400	on	on
1600	off	on
3200	on	off
6400	off	off

Main Application Areas

Suitable for various motion control automation equipment and instruments, such as electronic processing and inspection, semiconductor packaging, laser cutting and welding, laser typesetting, packaging machinery, engraving machines, marking machines, cutting machines, garment plotters, CNC machine tools, automated assembly equipment, etc.

Two-phase 42 Series (1.8°) Hybrid Stepper Motor

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