1. Introducció
This manual provides detailed instructions and specifications for the Micro 42MM Stepper Motor, designed for precision applications such as printer paper feed mechanisms. Two models are covered: Model A (EM-326) featuring a belt pulley, and Model B (EM-323) equipped with a copper gear. Both are 2-phase, 4-wire hybrid stepper motors.

2. Especificacions
The following tables detail the specifications for both stepper motor models:
2.1. Model A (EM-326) - With Belt Pulley
| Característica | Especificació |
|---|---|
| Tipus | 2-phase 4-wire Stepper Motor (HYBRID) |
| Model | EPSON EM-326 98310 |
| Especificació del motor | 42 mm |
| Body Height (including bracket) | 24 mm |
| Angle de pas | 1.8 graus |
| Resistència a la bobina | 4.5 ohms |
| Longitud del cable | 370 mm |
| Pes | 181 grams |
| Diàmetre de l'eix | 4 mm |
| Longitud de l'eix | 12.7 mm |
| Belt Wheel Diameter | 13 mm |
| Belt Wheel Height | 9.5 mm |
| Certificació | UL |

2.2. Model B (EM-323) - With Copper Gear
| Característica | Especificació |
|---|---|
| Tipus | 2-phase 4-wire Stepper Motor (HYBRID) |
| Model | EPSON EM-323 98290 |
| Especificació del motor | 42 mm |
| Body Height (including bracket) | 22.3 mm |
| Angle de pas | 3.75 graus |
| Resistència a la bobina | 11.5 ohms |
| Longitud del cable | 260 mm |
| Pes | 160.3 grams |
| Diàmetre de l'eix | 3 mm |
| Longitud de l'eix | 16.8 mm |
| Copper Gear Teeth | 16 |
| Copper Gear Diameter | 7 mm |
| Copper Gear Height | 4.4 mm |
| Certificació | UL |


3. Configuració i instal·lació
3.1. Muntatge
Both models come with an original bracket for easy mounting. Ensure the motor is securely fastened to a stable surface to prevent vibration during operation. Refer to the dimensions in the specifications section for proper fitment.
3.2. Cablatge
These are 2-phase, 4-wire stepper motors. They require a compatible stepper motor driver. The wiring connections are typically as follows:
- A+ (Filfer vermell)
- A- (Blue wire)
- B+ (Filfer negre)
- B- (Gray wire)
Connect these wires to the corresponding terminals on your stepper motor driver. Always consult your driver's manual for specific wiring instructions.

4. Instruccions de funcionament
To operate the stepper motor, you will need a stepper motor driver and a controller (e.g., microcontroller, PLC) to generate step and direction signals.
- Font d'alimentació: Connect a suitable DC power supply to your stepper motor driver. Ensure the voltage and current ratings are appropriate for both the motor and the driver.
- Configuració del controlador: Configure your stepper motor driver settings (e.g., current limit, microstepping, step mode) according to the motor's specifications and your application requirements.
- Control Signals: Connect the step and direction pins of your controller to the corresponding inputs on the stepper motor driver.
- Control de programari: Program your controller to generate the desired step pulses and direction signals to achieve the required motor movement.
The step angle for Model A is 1.8 degrees, and for Model B is 3.75 degrees. This determines the resolution of movement per step. Microstepping can be used with your driver to achieve finer control.
5. Manteniment
Stepper motors are generally low-maintenance devices. Follow these guidelines to ensure longevity:
- Mantenir net: Periodically clean the motor and its surroundings to prevent dust and debris buildup, especially around the shaft and any moving parts (pulley/gear).
- Comproveu les connexions: Ensure all electrical connections remain secure and free from corrosion. Loose connections can lead to erratic behavior or motor damage.
- Eviteu el sobreescalfament: Ensure adequate ventilation around the motor, especially during prolonged operation at high currents. Overheating can reduce motor lifespan.
- Inspeccionar el desgast: For Model A, check the belt pulley for any signs of wear or damage. For Model B, inspect the copper gear for tooth wear.
6. Solució De Problemes
If you encounter issues with your stepper motor, consider the following troubleshooting steps:
- Motor que no es mou:
- Verify power supply to the driver is correct and stable.
- Check all wiring connections (A+, A-, B+, B-) for correctness and continuity.
- Ensure the step and direction signals from the controller are being generated correctly.
- Confirm the driver's current limit is set appropriately for the motor.
- Erratic Movement or Missed Steps:
- Reduce the motor speed or acceleration settings in your controller.
- Increase the current limit on the driver (within motor specifications).
- Check for mechanical binding or excessive load on the motor shaft.
- Ensure the power supply can deliver sufficient current.
- Sobreescalfament del motor:
- Reduce the driver's current setting if it's too high.
- Ensure adequate ventilation or consider adding a heatsink if operating continuously at high loads.
- Check for short circuits in the motor windings or wiring.
7. Consells d'usuari
- Selecció del controlador: Always pair your stepper motor with a compatible stepper motor driver. The driver's current output should match the motor's rated current for optimal performance.
- Microstepping: Utilize microstepping features on your driver for smoother operation and reduced resonance, especially in applications requiring precise positioning.
- Prova inicial: When first setting up, start with low speeds and currents, gradually increasing them to find the optimal operating parameters for your specific application.
- Consideració de càrrega: Ensure the mechanical load on the motor does not exceed its torque capabilities to prevent missed steps or stalling.
8. Garantia i Suport
For warranty information, please refer to the terms and conditions provided by your point of purchase. For technical support or inquiries, please contact the seller directly. The seller for this product is Parts Hub Store.