NEMA 17 Double Axis Closed Loop Hollow Shaft Motor with Encoder – 0.45Nm 1.7A 1.8° Step Angle

This NEMA 17 double axis stepper motor with a hollow shaft design integrates an advanced encoder (1000 lines, AB differential signal) for precise position feedback and smooth motion control. It offers a holding torque of 0.45Nm and operates at DC 24-36V, making it an ideal choice for applications that require high accuracy, such as robotics, CNC, and automation systems.

Features

• Closed loop stepper motor with feedback for enhanced performance and precision.
• Built-in **1000 line encoder** with AB differential signal for real-time position monitoring.
• Durable **hollow shaft** design for easy integration into gearboxes and other systems requiring shaft connectivity.
• High torque output with 0.45Nm torque and 1.7A current.
• Environmentally robust with an operating temperature range from -20°C to +50°C.

Technical Specifications

Parameter	Specification
Step Angle	1.8° ±5%
Phase Voltage	3.0 VDC
Phase Current	1.7 Amps
Phase Resistance	1.5 Ω ±10% (At 20°C)
Inductance	3.0 mH ±20%
Static Torque	0.45 Nm (63.72 oz·in)
Insulation Class	Class B
Insulation Resistance	100MΩ Min. (500V DC)
Ambient Temperature	-20°C ~ +50°C
Motor Weight	Approx. 0.6 kg
Use Voltage	DC 24-36V
Recommended Driver	OK2D4020A

Encoder Wiring and Connection

Encoder Wiring Description

Color	Encoder Wire Description
Red	VDC (Power)
Black	Ground
Yellow	Channel A+
Green	Channel A-
Blue	Channel B+
White	Channel B−

Excitation Sequence and Direction

Step	A+	B+	A−	B−	Direction
1	+	+	−	−	Clockwise (CW)
2	+	−	−	+	Counterclockwise (CCW)
3	−	+	−	+	Clockwise (CW)
4	−	−	+	+	Counterclockwise (CCW)

Applications

• Robotics with precise feedback control
• CNC machinery for accurate positioning
• Automation systems requiring precise motion and torque
• Applications with high torque and low-speed control

Download Datasheet

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

📄 Download PDF Datasheet

What is an encoder on a motor?
An encoder on a motor is a sensor that provides real-time feedback about the motor’s position, speed, and direction. It helps ensure precise motion control.

What does an encoder do?
An encoder converts the motor’s rotational position into an electrical signal, which can then be used by a control system to adjust the motor’s movement and position in real-time.

What is the difference between encoder types?
Encoders can be incremental or absolute. Incremental encoders measure changes in position, while absolute encoders provide a specific position value. Differential encoders provide two signals to improve accuracy.