LCDA257-2A Two-Axis Closed-Loop Driver

Product Overview

LCDA257-2A driver is a digital step driver developed with the latest generation of 32-bit DSP chip, which can cover step motors with 57, 60, 86 mounting base; the driver supports two control modes: independent pulse control of two axes and synchronous pulse control of two axes, which can control two-axis step motors separately or synchronously for precise positioning control. This driver integrates two-axis step control into one, which not only saves installation space and cost for customers, but also can drive two machines at the same time to improve the accuracy of synchronous control of customers, and convenient wiring and debugging also improve the flexibility and convenience of on-site applications.

Features

Voltage input range: DC 24V~50V Maximum current: 5.6A Subdivision range: 800~51200ppr Signal input: differential/single-ended, pulse/direction or dual pulse Pulse response frequency: 200KHz Parameters can be configured via the serial port

Product Overview Supporting Products Data Download

Product Diagram

Control Terminals

Terminal Name	Description
PUL1+	Axis 1 - External pulse mode: used as pulse signal input, signal voltage supports 5V-24V; pulse input mode: pulse + direction (used as pulse port), dual pulse (used as CW port); pulse effective edge adjustable, default pulse rising edge effective; to reliably respond to pulse signals, pulse width should be greater than 2.5μs.
PUL1-
DIR1+	Axis 1 - External pulse mode: used as direction port input, signal voltage supports 5V-24V; pulse input mode: pulse + direction (used as direction port), dual pulse (used as CCW port); high/low level signal, to ensure reliable motor direction change, direction signal should be established at least 5μs before pulse signal.
DIR1-
ENA1+	Axis 1 enable control signal, this input signal is used to enable or disable the driver outputs of axis 1 and axis 2. When ENA is connected to low level (or internal optocoupler conduction), the driver will cut off the current of each motor phase to make the motor free and not respond to step pulses. When this function is not needed, leave the enable signal terminal floating. (Signal voltage supports 5-24V)
ENA1-
PUL2+	Axis 2 - External pulse mode: used as pulse signal input, signal voltage supports 5V-24V; pulse input mode: pulse + direction (used as pulse port), dual pulse (used as CW port); pulse effective edge adjustable, default pulse rising edge effective; to reliably respond to pulse signals, pulse width should be greater than 2.5μs.
PUL2-
DIR2+	Axis 2 - External pulse mode: used as direction port input, signal voltage supports 5V-24V; pulse input mode: pulse + direction (used as direction port), dual pulse (used as CCW port); high/low level signal, to ensure reliable motor direction change, direction signal should be established at least 5μs before pulse signal.
DIR2-
ENA2+	Axis 2 enable control signal, this input signal is used to enable or disable the driver outputs of axis 1 and axis 2. When ENA is connected to low level (or internal optocoupler conduction), the driver will cut off the current of each motor phase to make the motor free and not respond to step pulses. When this function is not needed, leave the enable signal terminal floating. (Signal voltage supports 5-24V)
ENA2-
ALM1+	Axis 1 alarm output signal, requires external 24V power supply; when axis 1 motor alarm occurs, signal is output through the alarm port. (Default is normally open interface, i.e., signal output when alarm occurs; can be changed to normally closed output by software communication parameter PA-21 set to 1, i.e., signal disconnects when alarm occurs.)
ALM1-
ALM2+	Axis 2 alarm output signal, requires external 24V power supply; when axis 2 motor alarm occurs, signal is output through the alarm port. (Default is normally open interface, i.e., signal output when alarm occurs; can be changed to normally closed output by software communication parameter PA-47 set to 1, i.e., signal disconnects when alarm occurs.)
ALM2-

Motor Encoder Wiring Definition

Terminal Name

1A+

1A-

1B+

1B-

2A+

2A-

2B+

2B-

Description

Axis 1 motor A phase and B phase motor winding interface

Motor rotation direction can be switched via SW5

Axis 2 motor A phase and B phase motor winding interface

Motor rotation direction can be switched via SW5

Encoder Wiring Pin Definition

Terminal Name	Description
EB1+	Axis 1 motor encoder B phase positive feedback pulse pin
EB1-	Axis 1 motor encoder B phase negative feedback pulse pin
EA1+	Axis 1 motor encoder A phase positive feedback pulse pin
EA1-	Axis 1 motor encoder A phase negative feedback pulse pin
EVCC	Axis 1 motor encoder power positive terminal (voltage +5V)
EGND	Axis 1 motor encoder power negative terminal
EB2+	Axis 2 motor encoder B phase positive feedback pulse pin
EB2-	Axis 2 motor encoder B phase negative feedback pulse pin
EA2+	Axis 2 motor encoder A phase positive feedback pulse pin
EA2-	Axis 2 motor encoder A phase negative feedback pulse pin
EVCC	Axis 2 motor encoder power positive terminal (voltage +5V)
EGND	Axis 2 motor encoder power negative terminal

Power Terminals

Terminal Name

Description

+VDC

Voltage input terminal: supports DC24-50V voltage

Recommended power supply 36V, 10A or 48V, 6A and above

GND

Working 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

Function DIP Switch Definition

SW5: Motor initial direction definition OFF: CW ON: CCW SW6: Open/Closed loop selection OFF: Open loop ON: Closed loop

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 57 Series (1.8°) Closed-loop Stepper Motor

Two-phase 60 series (1.8°) closed-loop stepper motor

Two-phase 86 Series (1.8°) Closed-loop Stepper Motor

< 1 > proceed page