MC425E Two-Phase 42 Digital Stepper Driver

Product Overview

MC425E Digital Low Voltage Stepper Motor Driver, using the latest ARM chip, universal for two-phase 35, 3, 42 series stepper motors, with excellent performance at medium and low speeds. It can set any subdivision within 400 to 6400 and any value within the rated current, which can meet the application needs of most small devices. With built-in micro-stepping technology, even under low subdivision conditions, it can achieve subdivision effects, and it runs smoothly at medium and low speeds, with low noise in driving the motor.

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. Input resistance is 220Ω; low level 0~0.5V, pulse width > 2.5μs.
DIR	Negative terminal for receiving direction control signals	Used to control motor rotation direction, active low. Input resistance is 220Ω; requirements: low level 0~0.5V, pulse width > 2.5μs.
OPTO	Common positive terminal for PUL/DIR/ENA	Connect to 5V power supply; +5V~24V can drive. For voltages above 5V, a current limiting resistor is required; +12V uses a 1.2KΩ resistor, +24V uses a 3KΩ resistor.
ENA	Negative terminal for receiving enable control signals	When connected (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's A-phase winding; B+ and B- connect to the positive and negative ends of the motor's B-phase winding. Swapping the A and B phase windings reverses the motor direction.
B+, B-

Product Diagram

Parameter Settings

The MC425E driver uses a 6-position DIP switch to set microstepping resolution, dynamic current, and half/full current, detailed 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

Hold Current Setting

The hold current can be set using the SW4 DIP switch; off means the hold current is set to half of the running current, on means the hold current equals the running current. For general use, SW4 should be set to off to reduce motor and driver heating, lower power consumption, and improve reliability. The current automatically halves 0.4 seconds after pulse signals stop, theoretically reducing heat generation to 25%.

Microstep 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, and automated assembly equipment.

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

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