LCDA257X Two-Phase 57 Closed-Loop Stepper Driver

Product Overview

The LCDA257X uses the latest dedicated motor control DSP chip and vector closed-loop control technology to completely overcome the problem of step loss in open-loop stepper motors. At the same time, it significantly improves the motor's high-speed performance, reduces motor heating and vibration, enhances machine processing speed and precision, and lowers machine power consumption. This driver is compatible with two-phase 57-type closed-loop stepper motors, facilitating upgrades from traditional stepper drive solutions and greatly reducing costs.

Features

Voltage input range: DC 20V~50V (recommended above 36V) Maximum peak current: 8A Subdivision range: 400-51200 Pulse form: Pulse + Direction Pulse response frequency: 0~200kHz Logic input current: 10~20mA Insulation resistance: 500M

Product Overview Supporting Products Data Download

Main Parameter Description

(1) Electrical Specifications

Parameter	LCDA257X
Parameter	Minimum Value	Typical Value	Maximum Value	Unit
Maximum Peak Current	-	-	8	A
Input Power Voltage	20	36	50	VDC
Logic Input Current	7	10	20	mA
Pulse Frequency	-	-	200	KHZ

Product Diagram

Driver Terminal Description

(1) Power Terminal Definition

No.	Symbol	Function Definition
1	A+	Motor Power Line Terminal Wiring color see label on motor
2	A-
3	B+
4	B-
5	+VDC	DC Power Input Terminal Recommended DC 36V or above
6	GND	DC Power Input Terminal Recommended DC 36V or above

(2) Driver Control Terminal Definition

Pin	Symbol	Description
1	PUL+	Pulse Input Positive
2	PUL-	Pulse Input Negative
3	DIR+	Direction Input Positive
4	DIR-	Direction Input Negative
5	ENA+	Enable Input Positive
6	ENA-	Enable Input Negative
7	ALM+	Alarm Output Positive
8	ALM-	Alarm Output Negative

(3) Driver Encoder Terminal Definition

Pin	Symbol	Color	Description
1	EB+	Yellow	Encoder B Signal Positive
2	EB-	Green	Encoder B Signal Negative
3	EA+	Black	Encoder A Signal Positive
4	EA-	Blue	Encoder A Signal Negative
5	VCC	Red	Encoder +5V Input
6	EGND	White	Encoder Power Ground

Microstep Subdivision Setting

Pulse / rev	SW1	SW2	SW3	SW4
Default	on	on	on	on
800	off	on	on	on
1600	on	off	on	on
3200	off	off	on	on
6400	on	on	off	on
12800	off	on	off	on
25600	on	off	off	on
51200	off	off	off	on
1000	on	on	on	off
2000	off	on	on	off
4000	on	off	on	off
5000	off	off	on	off
8000	on	on	off	off
10000	off	on	off	off
20000	on	off	off	off
40000	off	off	off	off

DIP Switch Setting
The current of this series of drivers is auto-tuned, so manual current setting is not required. The DIP switch functions are as follows:

SW1~SW4: Set driver subdivision (see subdivision table on driver casing, effective after restart);	SW5: Set motor direction (ON: forward, OFF: reverse);
SW6: Work mode selection (ON: open loop, OFF: closed loop);	SW7: Pulse mode selection (ON: CW/CCW, OFF: PUL+DIR);
SW8: Alarm port logic selection (ON: normally closed, OFF: normally open);

Alarm Handling

Alarm Type	Fault Description	Fault Handling
Flashes once every 5 seconds	Overcurrent Alarm	1. Motor power line short circuit or motor fault; 2. Driver current loop parameter set too high; 3. If no errors found in the above two points, it may be an internal driver fault and needs to be returned for inspection.
Flashes twice every 5 seconds	Overvoltage Alarm	1. Power supply voltage too high or unstable, check if transformer output voltage is normal; 2. Internal driver fault, needs to be returned for inspection.
Flashes three times every 5 secondsor Flashes seven times every 5 seconds	Encoder Fault	1. Encoder wire is broken or has poor contact. 2. Driver encoder input circuit is damaged.
	Overload Alarm	Motor stall or excessive load.
	Position Deviation Too Large	1. Motor power line phase sequence reversed, check the sequence according to the label on the motor; 2. Loose, poor contact, or broken motor power line or encoder wire can cause this fault,If there is a spare cable, try replacing the cable;

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.