Nema17-motor

⚙️ NEMA 17 Stepper Motor
📖 Product Description

The NEMA 17 stepper motor is a high-torque, precision bipolar stepper motor designed for accurate position and speed control.

It moves in small, fixed angular steps instead of continuous rotation, allowing precise control without feedback sensors. This makes it ideal for CNC machines, 3D printers, robotics, camera sliders, and automation systems.

The motor features a 1.8° step angle (200 steps per revolution), strong holding torque, and excellent reliability, making it one of the most widely used stepper motors in electronics and mechatronics projects.

✨ Key Features

✅ High precision positioning
✅ High holding torque
✅ 200 steps per revolution
✅ Bipolar 2-phase design
✅ Strong metal body
✅ Easy driver interface (A4988, DRV8825, TB6600, etc.)
✅ Ideal for CNC/3D printer use

📊 Technical Specifications

(values may slightly vary by manufacturer — typical model shown)

🔌 Electrical
Parameter Typical Value
Rated Voltage 2.8 – 4V
Rated Current 1 – 1.7A per phase
Phase Resistance 1–3 Ω
Power ~5–7W
Phases 2 (bipolar)
⚙️ Mechanical
Parameter Value
Step Angle 1.8°
Steps/Rev 200
Holding Torque 3–5.5 kg·cm (40–60 N·cm typical)
Shaft Diameter 5 mm
Shaft Length 20–24 mm
Body Size 42 × 42 mm
Mounting 31 mm hole spacing
Weight ~250–300 g
📍 Pin Configuration (Pinout)

NEMA 17 is 4-wire bipolar

🔹 Wires (2 coils)
Coil A → A+ A-
Coil B → B+ B-

Typical color codes
Wire Color Coil
Black A+
Green A−
Red B+
Blue B−

⚠️ Colors may vary → always check with multimeter

🔍 How to Identify Coils

Use multimeter (continuity/ohms):

Two wires showing resistance → same coil

Group them as A pair and B pair

🔌 Driver Connection (Example A4988 / DRV8825)

Stepper motor cannot connect directly to Arduino
❌ Too much current
✅ Always use a driver

Connection
Motor Driver
Coil A A1 A2
Coil B B1 B2

Driver then connects to Arduino using:

Driver Arduino
STEP Pulse pin
DIR Direction pin
EN Enable (optional)
⚙️ Working Principle (simple)

Each pulse → one step

Example:

200 steps = 1 full rotation

100 steps = 180°

50 steps = 90°

So you get very accurate positioning 😍

📦 Applications

Perfect for:

🖨️ 3D printers
🛠️ CNC machines
🤖 Robot arms
📷 Camera sliders
🎯 Position control systems
🔬 Lab automation
📦 Pick & place machines

⭐ Quick Summary

👉 Type: Bipolar stepper motor
👉 Size: 42×42 mm
👉 Steps: 200/rev
👉 Torque: High
👉 Driver needed: Yes (A4988/DRV8825/TB6600)
👉 Best for: Precision motion control

💡 Pro Tips (important!)

⭐ Never power directly from Arduino
⭐ Use proper driver with current limit
⭐ Add heatsink to driver
⭐ Use external power supply (12–24V works great)
⭐ Microstepping = smoother motion