NEMA 17 Stepper Motor 1.5–1.8 A
by Generic
SKU: PSA-CMP-NEMA17
No reviews yetTypical India street price
₹350–₹700
Standard 3D-printer stepper for CNC, plotters, and precision angles.
Interface: 4-wire bipolar
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Concept
A bipolar stepper moves in fixed angular steps when coils are sequenced by a driver.
A little theory
Typically 1.8°/step (200 steps/rev). Current is set on A4988/DRV8825, not by applying a fixed DC voltage to the coils. Holding torque depends on current and microstepping. In the classroom, treat NEMA 17 Stepper Motor 1.5–1.8 A as a intermediate part using 4-wire bipolar. Typical India street price is about ₹350–₹700. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Identify coil pairs with a DMM; connect to driver A1/A2 B1/B2; pulse STEP.
Classroom & project use
- Plotter
- Rotary index
- Lead-screw lift
Buying in India
Precautions
- Never drive from GPIO
- Set driver current first
- Mind hot motors after stall
Specifications
| Frame | NEMA 17 |
| Step | 1.8° typical |
| Wiring | Bipolar 4-wire |
| Category | Motors & Servos |
| Difficulty | Intermediate |
| Voltage | Driven via chopper driver (not direct MCU) |
| Interface | 4-wire bipolar |
Pinout
4 wires: Coil A pair + Coil B pair (colours vary — measure)
