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NEMA 34 Stepper Motor Introduction

The NEMA 34 stepper motor is a stepper motor with a 3.4 x 3.4 inch (86 x 86 mm) panel.

What is NEMA 34 Stepper Motor

NEMA 34 is a high torque hybrid bipolar stepper motor with a 3.4 x 3.4 inch panel. Hybrid stepper motors have a combination of variable reluctance stepper motors and permanent magnet stepper motors. The step angle of the motor is 1.8 degrees, which means that each step will cover 1.8 ° with 200 steps. The NEMA 34 is a 2-phase motor with a 4-wire system. Compatible controllers for this motor are CW230, CW250 and CW860.

NEMA 34 datasheet

NEMA 34 Pinout &Configuration

NEMA 34 has four terminals, as shown in the table.

NO.    Pin NameWireColourDescription
1Wire 1Red This motor has four wires terminated with bare leads: Red and Green connected to one coil; Yellow and Blue connected to other.  
2Wire 2Green
3Wire 3Yellow
4wire 4Blue
NEMA 34 Pinout &Configuration
NEMA34-Stepper-Motor-Pinout

NEMA 34 Features&Specification

  1. Voltage Rating: 3.0V
  2. Current Rating: 4.0 A
  3. Holding Torque: 42 Kg-cm
  4. Step Angle: 1.8 deg.
  5. Steps Per Revolution: 200
  6. No. of Phases: 2
  7. Motor Length:  118 mm
  8. Shaft Length : 32mm
  9. No. of Leads: 4
  10. Inductance Per Phase: 8.5 mH

NEMA 34 Equivalent stepper motors

  • The other stepper motors are: Nema 14, Nema 17, Nema23 , 28BYJ-48 Stepper Motor

How does a NEMA 34 work?

As mentioned above this stepper motor draws high current so instead of controlling it directly, use an appropriately powerful stepper motor drivers like cw230. Wiring diagram for NEMA 34 Stepper motor is given below:

Wiring diagram for NEMA 34

As shown in wiring diagram there are four wires of different colours i.e. Red, Green, Yellow and Blue. These wires are connected to two different coils. Red and Green connected to one coil while Yellow and Blue are connected to other.

To rotate the motor coils are energized in a logical sequence. To rotate the motor in anticlockwise motion of the rotor the phases are energized in the following sequence +A, +B, -A, -B, +B, +A and for the clockwise rotation, the sequence is +A, -B, +B, +A……..

NEMA 34 Applications

  • CNC machines
  • Precise control machines
  • 3D printer/prototyping machines (e.g. RepRap)
  • Laser cutters
  • Pick and place machines

That’s all for today. Hope you enjoyed this article. However, if you have doubts or have any questions about this, you can contact me in the comments section below. I’ll be happy to help you as best I can. Let us know your feedback and suggestions at any time, they allow us to provide you with high-quality work that responds to your needs and expectations, and helps you continue to give back to our products. Thank you for reading this article.

3Celectrons also provide this kind of parts, if you are interested in, just contact us!

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