1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Lichuan Dual Axis Modbus RS485 Nema23 Closed Loop Stepper Motor and CL57R-2A Driver Kit. This kit is designed for precise motion control in various applications, including CNC machinery, laser machines, textile machines, engraving machines, 3D printers, robots, and packaging machines.
The closed-loop control technology, featuring a position encoder, fundamentally solves the lost step issue common in traditional stepping motors, ensuring higher accuracy and stable operation.
2. Packaging List
Upon opening the package, please verify that all components are present and undamaged:
- Nema23 Closed Loop Stepper Motor: 2 pcs (Please choose the motor specification accordingly)
- CL57R-2A Closed Loop Stepper Driver / RS485 Control: 1 pc
- Power Cable: 2 pcs (Standard length: 0.5M)
- Encoder Cable: 2 pcs (Standard length: 3M)
Note: One driver is designed to work with two motors. Cables can be customized; please contact the seller if you require different lengths.
Image: Lichuan Dual Axis Stepper Motor Kit components, showing two motors and one driver.
3. Product Features
- Closed Loop Control Technology: Incorporates a position encoder to eliminate lost steps, providing the precision of an AC servo system.
- High Performance DSP Chip: Utilizes an imported Texas Instruments DSP digital chip for stable operation, higher accuracy, and improved response time.
- Robust Driver Housing: Manufactured using a scrub spray molding process, offering high temperature resistance, grinding resistance, dirt resistance, and high toughness, suitable for industrial automation environments.
- Easy Wiring: Features a PCB plug-in terminal block for easy installation, maintenance, and time-saving wiring.
- Dual Axis Control: The CL57R-2A driver supports controlling two Nema23 motors simultaneously, either independently or with synchronous pulse control.
- Efficient Design: Engineered for fast heat dissipation, ensuring long life and stable operation.
Image: Closed-loop stepper drive control schematic, illustrating feedback loop with encoder.
Image: Explanation of imported DSP digital chip and comparison graph of closed-loop vs. open-loop stepping systems.
Image: Details of the drive's scrub spray molding process and PCB plug-in terminal block for easy wiring.
4. Setup and Installation
4.1. Component Identification
Image: Functional description of the CL57R-2A drive, showing RS485 interface, axis encoder/motor interfaces, power interface, and DIP switch banks.
The CL57R-2A drive features the following interfaces:
- RS485 Interface: For Modbus communication (RS485+, RS485-).
- Function Control Port: 5V-24V inputs (1:X1, 2:X2, 3:X3, 4:X4, 1:Y1, 2:Y2, 3:Y3).
- Axis1 Encoder Interface (EB1+, EB1-, EA1+, EA1-, EVCC, EGND): For the first motor's encoder feedback.
- Axis2 Encoder Interface (EB2+, EB2-, EA2+, EA2-, EVCC, EGND): For the second motor's encoder feedback.
- Axis1 Motor Interface (1A+, 1A-, 1B+, 1B-): For connecting the first stepper motor.
- Axis2 Motor Interface (2A+, 2A-, 2B+, 2B-): For connecting the second stepper motor.
- Power Interface (+VDC, GND): DC 20-50V power input.
- Power Indicator: Green.
- Fault Indicator: Red.
4.2. Wiring Instructions
Ensure all power is disconnected before making any wiring connections.
Image: Motor wiring diagram showing coil connections and a table defining encoder lead colors and their functions.
4.2.1. Motor Wiring
Connect the Nema23 stepper motor to the drive's motor interface as follows:
- Red wire: A+
- Blue wire: A-
- Black wire: B+
- Green wire: B-
4.2.2. Encoder Wiring
Connect the motor's encoder to the drive's encoder interface:
| Pin | Wire Color | Function |
|---|---|---|
| 1 | Yellow | EB+ |
| 2 | Green | EB- |
| 3 | Black | EA+ |
| 4 | Blue | EA- |
| 5 | Red | +5VCC |
| 6 | White | EGND |
4.2.3. Power Supply Connection
Connect a DC 20-50V power supply to the +VDC and GND terminals of the drive.
4.2.4. Application Wiring Diagram
A complete stepper motor control system typically includes a DC switching power supply, a PLC (pulse source), the stepper drive, and the stepper motor(s). Refer to the diagram below for a typical application setup.
Image: Diagram illustrating the connection of a DC switching power supply, PLC (pulse source), stepper drive, and stepper motor.
4.3. DIP Switch Settings
The CL57R-2A driver features DIP switches for configuring various parameters. Refer to the table on the drive (also shown in the 'Functional description of the drive' image) for specific settings.
4.3.1. Current Settings (SW1-SW6)
These switches are used to set the peak current for the motors. Consult the drive's label for the exact current values corresponding to each switch combination.
4.3.2. Direction Settings (SW7-SW8)
These switches control the motor's direction (e.g., CW/CCW or forward/reverse).
4.3.3. Baudrate Settings (SW9-SW10)
These switches configure the communication baud rate for the Modbus RS485 interface.
4.3.4. Microstep Settings (SW11-SW12)
These switches determine the microstepping resolution of the motors.
5. Operation
Once the kit is properly wired and configured via the DIP switches, the system can be controlled using the Modbus RS485 interface. The CL57R-2A driver allows for independent or synchronous pulse control of the two connected Nema23 motors.
- Modbus RS485 Control: Use a compatible Modbus master device (e.g., PLC, HMI, or PC with RS485 adapter) to send commands to the driver. Refer to the Modbus communication protocol documentation for detailed command structures.
- Function Control Port: The function control port (X1-X4, Y1-Y3) can be used for external control signals, depending on the specific application and driver configuration.
- Monitoring: The green power indicator light confirms the drive is powered on. The red fault indicator light will illuminate if an error occurs.
6. Maintenance
- Keep Clean: Regularly clean the drive and motors to prevent dust and debris buildup, which can affect performance and heat dissipation.
- Check Connections: Periodically inspect all wiring connections to ensure they are secure and free from corrosion or damage.
- Ensure Ventilation: Ensure the drive has adequate ventilation to prevent overheating. Do not obstruct cooling fins or air vents.
- Environmental Conditions: Operate the kit within specified temperature and humidity ranges to ensure optimal performance and longevity.
7. Troubleshooting
If you encounter issues with your Lichuan stepper motor kit, refer to the following common troubleshooting steps:
- No Power: Check the power supply connection and ensure it is within the DC 20-50V range. Verify the power indicator (green LED) on the drive is lit.
- Motor Not Moving/Erratic Movement:
- Check motor wiring for correct phase connections (A+, A-, B+, B-).
- Verify encoder connections are correct and secure.
- Ensure DIP switch settings for current and microsteps are appropriate for your motor and application.
- Check Modbus communication for correct commands and baud rate.
- Fault Indicator (Red LED) On: This indicates an error. Common causes include over-voltage, under-voltage, over-current, or motor/encoder connection issues. Power cycle the drive and recheck all connections.
- Overheating: Ensure proper ventilation around the drive and motors. Reduce the motor current if possible, or consider adding external cooling.
For persistent issues, please refer to the detailed Modbus communication protocol documentation or contact Lichuan technical support.
8. Specifications
8.1. CL57R-2A Drive Parameters
Image: Table detailing the specifications of the CL57R-2A drive.
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Product Model | CL57R-2A | Product Size | 134 x 83 x 33mm |
| Current Range | Peak Current 6A | Product Weight | 0.3KG |
| Power Supply Area | DC20 ~ 50V | Drive Motor | Two-phase Nema23 closed-loop motor |
| Communication Interface | RS485 | Protocol | MODBUS RTU |
| Encoders | 1000 line increment | Insulation Resistance | 100MΩ |
| Maximum Load Rate | 115200 | Signal Voltage | 5V-24V Universal |
8.2. Nema23 Motor Parameters
Image: Table detailing the specifications for various Nema23 Closed-Loop Motor models.
Image: Diagram showing the shape and installation dimensions (unit: mm) for the Two-Phase Nema23 Closed-Loop Motor.
| Model | Step Angle (°) | Length L (mm) | Holding Torque (N.m) | Rated Current (A) | Rotor Inertia (g.cm²) | Motor Weight (Kg) | Encoder Resolution (PPR) |
|---|---|---|---|---|---|---|---|
| LC57H256 | 1.8 | 76 | 1.0 | 3.0 | 300 | 0.78 | 1000 |
| LC57H265 | 1.8 | 85 | 1.5 | 3.0 | 400 | 1.18 | 1000 |
| LC57H276 | 1.8 | 98 | 2.0 | 3.0 | 480 | 1.2 | 1000 |
| LC57H280 | 1.8 | 102 | 2.2 | 4.0 | 520 | 1.5 | 1000 |
| LC57H2100 | 1.8 | 123 | 3.0 | 4.0 | 720 | 1.7 | 1000 |
| LC57H2112 | 1.8 | 134 | 3.5 | 4.0 | 800 | 1.8 | 1000 |
General Motor Properties:
- Shaft Diameter: 8mm
- Shaft Extension: D-cut 0.5 x 15
- Shaft Length: 21mm
- Phase: 2
- Type: HYBRID
- Certification: RoHS, CE
- Origin: Mainland China
- Cable length: 3m (encoder cable)
9. User Tips
- Always double-check all wiring connections before applying power to prevent damage to the components.
- Ensure the drive and motors are mounted in a location with adequate airflow to prevent overheating, especially during prolonged operation or high load conditions.
- Familiarize yourself with the Modbus RTU protocol for the CL57R-2A driver to fully utilize its control capabilities.
- When customizing cable lengths, ensure high-quality shielded cables are used for encoder connections to minimize noise interference.
10. Warranty and Support
For warranty information, technical support, or any inquiries regarding your Lichuan Dual Axis Modbus RS485 Nema23 Closed Loop Stepper Motor and CL57R-2A Driver Kit, please contact the Lichuan Servo Motor Factory Store directly.
Contact Information:
- Email: annie@xlichuan.com
- Skype: annie_5543
- WhatsApp: +86 13714817266
The manufacturer is committed to providing professional servo & stepper motor driver solutions and support.