Nema17 12-24V 1.7A High Torque Stepper motor 1.8/step 6 Wire (New)

The NEMA 17 stepper motor you described is a common high-torque model frequently used in 3D printers and small CNC machines. While “6-wire” unipolar motors exist, the dimensions and electrical specs provided (1.7A, 42x40mm) often align with bipolar hybrid stepper motors used with 12-24V power supplies.

Key Specifications

• Frame Size: NEMA 17 (42x42x40 mm faceplate).
• Body Length: 40mm (often referred to as a 42-40 motor).
• Step Angle: 1.8 degree (200 steps per revolution).
• Rated Current:1.7A per phase.
• Voltage Range: Typically driven at 12-24V DC using a constant-current driver.
• Holding Torque: Generally between 40 Ncm (56 oz-in) and 45 Ncm (63 oz-in).
• Shaft Diameter: 5mm (standard “D” shape)

6-Wire vs. 4-Wire Wiring

A 6-wire stepper motor can be operated in unipolar or bipolar modes. To use it with most modern 4-wire (bipolar) drivers like the A4988 or TMC2209:

• Bipolar Series: Use the four outer wires and leave the two center-tap wires disconnected. This provides higher torque at low speeds.
• Unipolar Mode: Requires a specific unipolar driver that utilizes all six wires, including the center taps.

Typical Wiring (4-Wire Bipolar Setup)

If you are converting it to a 4-wire setup for a 3D printer:

• Phase A: Often Black (A+) and Green (A-).
• Phase B: Often Red (B+) and Blue (B-).
• Center Taps: Usually White and Yellow (these should be taped off and ignored if using a 4-wire driver).

For reliable operation, ensure your motor driver current limit is set to match the 1.7A rating to prevent overheating or missed steps.

Stepper Motor Applications

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