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6-lead, unipolar/bipolar stepper motor wires are terminated with bare leads. |
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6-lead, unipolar/bipolar stepper motor wiring diagram. |
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Overview
This high-torque hybrid stepping motor has a 1.8deg; step angle (200steps/revolution). Each phase draws 2A at 3.6V, allowing for a holding torque of 9kg-cm (125oz-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 and controlling it with an appropriately powerful bipolar stepper motor driver, such as our High-Power Stepper Motor Driver 36v4, or our Tic 36v4 High-Power Stepper Motor Controller. In particular, the Tic makes control easy because it supports six different interfaces (USB, TTL serial, I²C, RC, analog voltages, and quadrature encoder) and is configurable over USB with our free configuration utility.
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NEMA23 stepper motor (item #1475) mounted with a steel L-bracket for NEMA23 stepper motors. |
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Our 1/4³ universal mounting hub and 1/4³ scooter wheel adapter can be used to mount objects on the stepper motor#8217;s 1/4³-diameter output shaft, and we carry a NEMA 23 steel bracket for securely mounting this stepper motor to a flat surface (the picture above shows this bracket being used with a taller NEMA 23 stepper motor).
Specifications
- Size: 56.4mmsquare—56mm, not including the shaft (NEMA 23)
- Weight: 0.7kg (25oz)
- Shaft diameter: 6.35mm (0.25³) #8220;D#8221;
- Steps per revolution: 200
- Current rating: 2A per coil
- Voltage rating: 3.6V
- Resistance: 1.8Omega; per coil
- Holding torque: 9kg-cm (125oz-in)
- Inductance: 2.5mH per coil
- Lead length: 30cm (12³)
- Output shaft supported by two ball bearings
More specifications are available in the datasheet (49k pdf).
Dimensions
The following diagram shows the stepper motor dimensions in mm. The output D-shaft has a 0.25³ (6.35mm) diameter with a section that is flattened by 0.5mm (note: the diagram below incorrectly lists this flattened width as 6mm when it is really 5.85mm). This shaft works with our 1/4³ universal mounting hub and 1/4³ scooter wheel adapter.
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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
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Pololu#8217;s assortment of stepper motors. |
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Note: This stepper motor is SOYO part number SY57STH56-2006A.