Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 57×76mm, 4.5V, 2 A/Phase
Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 57×76mm, 4.5V, 2 A/Phase
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This NEMA 23-size hybrid stepping motor can be used as a unipolar or bipolar stepper motor and has a 1.8° step angle (200 steps/revolution). Each phase draws 2 A at 4.5 V, allowing for a holding torque of 14 kg-cm (190 oz-in).
Overview
This high-torque hybrid stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 2 A at 4.5 V, allowing for a holding torque of 14 kg-cm (190 oz-in). The motor has six color-coded wires terminated with bare leads that allow it to be controlled by both unipolar and bipolar stepper motor drivers. When used with a unipolar stepper motor driver, all six leads are used. When used with a bipolar stepper motor driver, the center-tap yellow and white wires can be left disconnected (the red-blue pair gives access to one coil and the black-green pair gives access to the other coil). We recommend using it as a bipolar stepper motor.
NEMA 23 stepper motor (item #1475) mounted with a steel L-bracket for NEMA 23 stepper motors. |
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Our 1/4″ universal mounting hub and 1/4″ scooter wheel adapter can be used to mount objects on the stepper motor’s 1/4″-diameter output shaft, and we carry a NEMA 23 steel bracket for securely mounting this stepper motor to a flat surface.
Specifications
- Size: 56.4 mm square × 76 mm, not including the shaft (NEMA 23)
- Shaft diameter: 6.35 mm (0.25″) “D”
- Steps per revolution: 200
- Current rating: 2 A per coil
- Voltage rating: 4.5 V
- Resistance: 2.25 Ω per coil
- Holding torque: 14 kg-cm (190 oz-in)
- Inductance: 3.6 mH per coil
- Lead length: 30 cm (12″)
- Output shaft supported by two ball bearings
More specifications are available in the datasheet (39k pdf).
Dimensions
The following diagram shows the stepper motor dimensions in mm. The output D-shaft has a 0.25″ (6.35 mm) diameter with a section that is flattened by 0.5 mm. This shaft works with our 1/4″ universal mounting hub and 1/4″ scooter wheel adapter.
The inside of a bipolar stepper motor (SOYO NEMA 14-size). |
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Stepper Motor Applications
Stepper motors are generally used in a variety of applications where precise position control is desirable and the cost or complexity of a feedback control system is unwarranted. Here are a few applications where stepper motors are often found:
- Printers
- CNC machines
- 3D printer/prototyping machines (e.g. RepRap)
- Laser cutters
- Pick and place machines
- Linear actuators
- Hard drives
Pololu’s assortment of stepper motors. |
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Note: This stepper motor is SOYO part number SY57STH76-2006A.
Dimensions
Size: | 56.4 mm square × 76 mm |
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NEMA size: | 23 |
Shaft diameter: | 6.35 mm |
General specifications
Shaft type: | 1/4 inch "D" |
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Current rating: | 2000 mA |
Voltage rating: | 4.5 V |
Holding torque: | 190 oz·in |
Steps per revolution: | 200 |
Resistance: | 2.25 Ohm2 |
Inductance per phase: | 3.6 mH |
Number of leads: | 6 |
Lead length: | 30 cm |
Notes:
1. Not including the shaft.
2. Per coil.
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