High Precision NEMA 11 Closed Loop Stepper Motor with Planetary Gearbox (Gear Ratio 5:1 / 10:1 / 20:1 / 50:1) | Integrated Stepper Motor Driver

Product Overview – High Precision NEMA 11 Closed Loop Stepper Motor with Planetary Gearbox

This planetary gearbox with motor combines a closed loop stepper motor, magnetic encoder, and precision planetary gear reducer into one compact unit.
It provides excellent torque control, high positioning accuracy, and smooth operation for demanding applications such as robotic arms, 3D printers, and CNC systems.

Main Features

• Integrated closed loop control system with encoder feedback (1000PPR / 4000CPR)
• High efficiency planetary gearbox (up to 94%) with gear ratio options: 5:1, 10:1, 20:1, 50:1
• Low noise ≤55dB, backlash ≤15 arcmin
• Compact design suitable for small automation and precision transmission systems
• Built-in stepper motor driver for easy integration

Technical Specifications

Item	Specification
Step Angle	1.8° ±5%
Number of Phases	2
Phase Voltage	4.1V DC
Phase Current	1.0A
Phase Resistance	4.1Ω ±10%
Phase Inductance	4.0mH ±20%
Holding Torque	1000 g·cm
Insulation Class	Class B
Ambient Temperature	-20°C ~ +50°C
Efficiency	90%–94%

Gear Ratio and LED Indicator Codes

Reduction Ratio	Exact Reduction Ratio	Stage	Gear Box Length (L)	Efficiency (%)	Backlash (Arcmin)
4	4	1	38	96	<10
5	5	1	38	96	<10
7	7	1	38	96	<10
10	10	1	38	96	<10
16	16	2	46.5	94	<15
20	20	2	46.5	94	<15
25	25	2	46.5	94	<15
28	28	2	46.5	94	<15
35	35	2	46.5	94	<15
40	40	2	46.5	94	<15
50	50	2	46.5	94	<15
70	70	2	46.5	94	<15

LED Indicator Codes and Motor Status

LED Codes	Indicator Description	Error	Error Description
🟢	Green light always on	—	Motor in operation
🟢 (flashing)	Green light flashing	—	Motor stop
🔴🟢	One red and one green	Driver overcurrent	Motor winding open circuit
🔴🔴🟢	Two red and one green	Driver input overvoltage	Motor input overvoltage
🔴🔴🔴🟢	Three red and one green	Driver input undervoltage	Motor input undervoltage
🔴🔴🔴🔴🟢	Four red and one green	Position deviation	Position error detected
🔴🔴🔴🔴🔴🟢	Five red and one green	Position deviation	Large position deviation
🔴🔴🔴🔴🔴🔴🟢	Six red and one green	Encoder detection error	Detect encoder error

Note: LED codes indicate the motor’s real-time operating or fault status. Refer to the driver manual for detailed troubleshooting.

Wiring Diagram

Wire No.	Color	Signal	Description
1	Red	V+	Power Supply Positive
2	Black	V-	Power Supply Negative
3	Green	PUL+	Pulse Signal Positive
4	Yellow	PUL-	Pulse Signal Negative
5	Purple	DIR+	Direction Signal Positive
6	Orange	DIR-	Direction Signal Negative
7	White	EN+	Enable Signal Positive
8	Blue	EN-	Enable Signal Negative
9	Brown	ALM+	Alarm Output Positive
10	Grey	ALM-	Alarm Output Negative
11	Brown	EX+	External Signal Positive
12	Grey	EX-	External Signal Negative

FAQ – Planetary Gearbox Knowledge

What is a planetary gear?
A planetary gear system consists of a central sun gear, multiple planet gears, and an outer ring gear. It provides compact transmission and high torque density.

How does planetary gear work?
Planetary gears rotate around the sun gear while transmitting motion through the ring gear, distributing torque evenly and reducing backlash.

What is the planetary gearbox with motor?
It integrates a planetary gearbox and a closed loop stepper motor into one unit for high precision and compact design.

What are planetary gears used for?
They are used in robotics, CNC machines, servo systems, and motion control applications requiring precision torque transmission.

Download Datasheet

Download the full specification sheet for detailed parameters, wiring guide, and performance curves.

📄 Download PDF Datasheet

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