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Pololu item #:
1205
Brand:
SOYO
Status:
Active and Preferred
This NEMA 11-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 670 mA at 3.8 V, allowing for a holding torque of 600 g-cm (8.3 oz-in).
Compare all products in Stepper Motors.
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Dimensions (in mm) of 28mm square bipolar stepper motors. |
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Bipolar stepper motor wires are terminated with bare leads. |
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Bipolar stepper motor wiring diagram. |
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5mm Pololu universal aluminum mounting hub on a stepper motor with a 5mm-diameter output shaft. |
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The inside of a bipolar stepper motor (SOYO NEMA 14-size). |
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Bipolar stepper motors; from left to right: 20×30, 28×32, 28×45, 35×26, 35×28, 35×36mm. |
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Bipolar stepper motor wires are terminated with bare leads. |
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Bipolar stepper motor wiring diagram. |
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This hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 670 mA at 3.8 V, allowing for a holding torque of 600 g-cm (8.3 oz-in). The motor has four color-coded wires terminated with bare leads: black and green connect to one coil; red and blue connect to the other. It can be controlled by a pair of suitable H-bridges (one for each coil), but we recommend using a bipolar stepper motor driver or one of our Tic Stepper Motor Controllers. In particular, the Tics make control easy because they support six different interfaces (USB, TTL serial, I²C, RC, analog voltages, and quadrature encoder) and are configurable over USB with our free configuration utility.
Our 5 mm universal mounting hub can be used to mount objects on the stepper motor’s 5 mm-diameter output shaft.
More specifications are available in the datasheet (44k pdf).
The following diagram shows the stepper motor dimensions in mm. The dimension labeled “Length” is 32 mm. The output D-shaft has a length of 20 mm and a 5 mm diameter with a section that is flattened by 0.5 mm. This shaft works with our 5 mm universal mounting hub.
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The inside of a bipolar stepper motor (SOYO NEMA 14-size). |
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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:
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Pololu’s assortment of stepper motors. |
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Note: This stepper motor is SOYO part number SY28STH32-0674A.
| Size: | 28 mm square × 32 mm1 |
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| NEMA size: | 11 |
| Weight: | 110 g |
| Shaft diameter: | 5 mm |
| Shaft type: | 5 mm "D" |
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| Current rating: | 670 mA2 |
| Voltage rating: | 3.8 V |
| Holding torque: | 8.3 oz·in |
| Steps per revolution: | 200 |
| Resistance: | 5.6 Ohm2 |
| Inductance per phase: | 4.2 mH |
| Number of leads: | 4 |
| Lead length: | 30 cm |
Yes. To avoid damaging your stepper motor, you want to avoid exceeding the rated current, which is 600 mA in this instance. All of our stepper motor drivers let you limit the maximum current, so as long as you set the limit below the rated current, you will be within spec for your motor, even if the voltage exceeds the rated voltage. The voltage rating is just the voltage at which each coil draws the rated current, so the coils of your stepper motor will draw 600 mA at 3.9 V. By using a higher voltage along with active current limiting, the current is able to ramp up faster, which lets you achieve higher step rates than you could using the rated voltage.
If you do want to use a lower motor supply voltage for other reasons, consider using our DRV8834 or STSPIN-220 low-voltage stepper motor drivers.
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