1. Introduction
This manual provides essential information for the installation, operation, maintenance, and troubleshooting of the QIXING Servo Motor Sensor Encoder Control Box. This electronic board is a critical spare part designed for industrial sewing machines, ensuring precise control and functionality of the servo motor. Please read this manual thoroughly before installation and use to ensure proper function and longevity of the component.
2. Product Overview
The QIXING servo motor sensor encoder is an electronic board (PCB) that acts as a sensor for the servo motor control box in industrial sewing machines. It comes in different configurations (Type A, B, C) to suit various machine models (682, 602, 622). Each type features a distinct connector for integration into the sewing machine's control system.

- Type A: Features a purple connector.
- Type B: Features a white connector.
- Type C: Features a grey cable with a D-sub connector.
3. Setup and Installation
Safety First: Always disconnect the sewing machine from the power supply before attempting any installation or maintenance.
- Identify the Correct Type: Refer to Figure 1 and your existing sensor encoder to ensure you have the correct QIXING type (A, B, or C) for your industrial sewing machine model (682, 602, or 622).
- Power Off: Turn off the sewing machine and unplug it from the electrical outlet.
- Access Control Box: Carefully open the servo motor control box or the relevant compartment where the sensor encoder is located. Consult your sewing machine's specific service manual for exact access procedures.
- Disconnect Old Sensor: Gently disconnect the wiring harness from the old sensor encoder. Note the orientation and connection points for re-installation.
- Remove Old Sensor: Unscrew or unclip the old sensor encoder from its mounting position.
- Install New Sensor: Place the new QIXING sensor encoder into the mounting position and secure it.
- Connect Wiring: Connect the wiring harness to the new sensor encoder, ensuring a firm and correct connection. Double-check that all pins are aligned and fully inserted.
- Secure Control Box: Close and secure the control box cover.
- Power On: Plug the sewing machine back into the power outlet and turn it on.
- Test Functionality: Perform a test run of the sewing machine to ensure the servo motor and sensor encoder are functioning correctly.
Note: If you are unsure about any step, it is highly recommended to seek assistance from a qualified technician or refer to your specific industrial sewing machine's service manual.
4. Operating Instructions
The QIXING Servo Motor Sensor Encoder is a component part of the industrial sewing machine's control system. It does not have direct user-operable controls. Its function is to provide feedback to the servo motor control box, enabling precise speed and position control of the sewing machine's motor.
Once correctly installed, the sensor encoder operates automatically as part of the sewing machine's electronic system. Refer to your industrial sewing machine's main user manual for instructions on operating the sewing machine itself, including speed adjustments and stitch settings, which are indirectly influenced by the sensor encoder's performance.
5. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of the sensor encoder.
- Cleaning: Periodically inspect the sensor encoder for dust, lint, or debris accumulation. Gently clean the board and connectors using a soft, dry brush or compressed air. Avoid using liquids or abrasive cleaners.
- Inspection: Check for any visible signs of damage, such as cracked solder joints, burnt components, or frayed wires. If damage is found, the unit may need replacement.
- Environmental Conditions: Ensure the control box area remains dry and free from excessive humidity or extreme temperatures, which can affect electronic components.
- Secure Connections: Occasionally verify that all electrical connections to the sensor encoder are secure and free from corrosion.
6. Troubleshooting
If you experience issues with your industrial sewing machine's servo motor control after installing or while using the QIXING sensor encoder, consider the following troubleshooting steps:
- No Power/No Response:
- Ensure the sewing machine is properly plugged in and powered on.
- Check all connections to the sensor encoder and the control box for looseness or incorrect insertion.
- Erratic Motor Behavior:
- Verify that the correct sensor encoder type (A, B, or C) is installed for your specific sewing machine model.
- Inspect the sensor encoder for any physical damage or contamination that might interfere with its operation.
- Consult your sewing machine's main manual for error codes related to the servo motor or control system.
- Incorrect Speed/Positioning:
- This could indicate a faulty sensor encoder or an issue with the servo motor itself.
- Ensure no external factors (e.g., tangled threads, mechanical obstruction) are affecting the motor's movement.
If problems persist after performing these checks, contact a qualified sewing machine technician or the product supplier for further assistance.
7. Specifications
| Feature | Specification |
|---|---|
| Product Type | Servo Motor Sensor Encoder Electronic Board (PCB) |
| Application | Industrial Sewing Machine |
| Compatible Models | 682, 602, 622 type industrial sewing machines |
| Stitch Formation | Lock Stitch (relevant for compatible machines) |
| High-concerned chemical | None |
| Origin | Mainland China |
| Approx. Package Length | 8 cm |
| Approx. Package Width | 8 cm |
| Approx. Package Height | 10 cm |
| Approx. Package Weight | 0.1 kg |
8. User Tips
- Always verify the specific model number of your industrial sewing machine before purchasing a replacement sensor encoder to ensure compatibility.
- Handle the electronic board with care, avoiding static discharge and physical impact.
- When disconnecting or connecting cables, always grasp the connector housing, not the wires, to prevent damage.
9. Warranty and Support
For information regarding warranty coverage, technical support, or replacement parts, please contact the original seller or the QIXING brand manufacturer directly. Keep your purchase receipt or order details handy when contacting support.