Dc Gear Motor With Magnetic Linear Encoder jGA25-370 (170RPM-6V)

The GA25-370 (170RPM - 6V)

 with a magnetic encoder is a precision-geared DC motor designed for robotics and automation requiring feedback for closed-loop control. At 6V, the 170RPM configuration typically utilizes a 34:1 reduction ratio to provide a balance of speed and mechanical strength.

Technical Specifications

• Operating Voltage: 6V DC (functional from 3V to 9V).
• No-Load Speed: 170 RPM at 6V.
• Torque: Typical rated torque is approximately 0.6 kg·cm to 0.8 kg·cm, with a stall torque near 3.0 kg·cm for this speed variant.
• Current Draw: No-load current of ~100mA and a stall current of ~1.2A to 2.0A depending on the specific manufacturer's winding.
• Shaft: 4mm diameter D-shaped shaft for secure attachment.

Magnetic Encoder Details

The integrated encoder uses a Hall-effect sensor and a magnetic disc to provide real-time feedback on position and speed.

• Resolution: Most standard encoders for this series provide 11 Pulses Per Revolution (PPR) from the motor shaft. After the 34:1 gearbox, this results in approximately 374 PPR at the output shaft.
• Output: Dual-channel (Phase A and B) quadrature square wave signals, allowing for detection of both speed and direction.
• Encoder Voltage: Typically requires a separate 3.3V to 5V DC supply.

Wiring Configuration

While colors may vary by brand, the standard 6-pin connector usually follows this layout: 

1. Red: Motor power (+).
2. White: Motor power (-).
3. Black: Encoder Ground (GND).
4. Blue: Encoder Power (VCC: 3.3V-5V).
5. Yellow: Signal Phase A.
6. Green: Signal Phase B.