Optical Feedback 300PPR Encoder Integrated Stepper, 0.07Nm – Nema 11 Closed_loop Compact Design

Product Overview

This Nema 11 closed-loop stepper motor combines a high-efficiency bipolar stepper motor with an integrated 300PPR optical incremental encoder. With a compact 28x28mm frame and 46mm body length, it provides 0.07Nm (9.91oz.in) of holding torque at 0.67A current. The built-in encoder delivers real-time feedback to ensure precise positioning, reduced step loss, and better motion reliability—ideal for compact automation systems.

Key Features

• Closed-loop control with 300PPR optical encoder for real-time feedback

• 0.07Nm holding torque and low current draw (0.67A/phase)

• Compact 28mm frame and 5mm shaft diameter for easy integration

• 2-channel encoder output with up to 30kHz signal frequency

• Ideal for small-scale CNC systems, robotics, and medical devices

Technical Specifications

Motor Parameters

• Motor Type: Bipolar Stepper

• Step Angle: 1.8°

• Holding Torque: 0.07Nm (9.91oz.in)

• Rated Current/Phase: 0.67A

• Voltage: 3.75V

• Phase Resistance: 5.6Ω

• Inductance: 4.00mH ±20% (1kHz)

• Insulation Class: B (130°C / 266°F)

Mechanical Dimensions

• Frame Size: 28 x 28mm (Nema 11)

• Motor Length: 46mm

• Shaft Diameter: Φ5mm

• Shaft Length: 20mm

• Number of Leads: 4

• Lead Length: 500mm

Encoder Details

• Encoder Type: Optical Incremental

• Resolution: 300PPR

• Driving Voltage: 5VDC

• Output Current: ≤ 20mA

• Output Signal: 2 Channels (A/B)

• Output Frequency: ≤ 30kHz

• Output Low Voltage: ≤ 0.3VDC

• Output High Voltage: ≥ 3.4VDC

• Shaft Diameter (Encoder Side): Φ5mm

Typical Applications

• Compact CNC equipment

• Medical diagnostic instruments

• Precision 3D printing

• Robotics and automation arms

• Optical alignment devices

Why Choose This Motor?

Combining precision, compact size, and feedback control, this Nema 11 stepper with a 300PPR encoder is perfect for motion-critical embedded systems.