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Gearmotor is a powerful 12V brushed DC motor with a 50:1 metal gearbox and an integrated quadrature encoder
Free shipping
free shipping in Poland for all orders over 500 PLN
Same day shipping
If your payment will be credited to our account by 11:00
14 days for return
Each consumer can return the purchased goods within 14 days
Overview:
This powerful brushed DC gearmotor is available in six different gear ratios and features an integrated quadrature encoder with 64 counts per revolution (CPR) of the motor shaft. The motor and encoder portion is available by itself (no gearbox), and versions without the encoder are also available.
Gear Ratio | No-Load Speed @ 12 V | Stall Torque @ 12 V | Stall Current @ 12 V | With Encoder | Without Encoder |
---|---|---|---|---|---|
1:1 | 11,000 RPM | 5 oz-in | 5 A | motor without gearbox | |
19:1 | 500 RPM | 84 oz-in | 5 A | 37Dx68L mm | 37Dx52L mm |
30:1 | 350 RPM | 110 oz-in | 5 A | 37Dx68L mm | 37Dx52L mm |
50:1 | 200 RPM | 170 oz-in | 5 A | 37Dx70L mm | 37Dx54L mm |
70:1 | 150 RPM | 200 oz-in | 5 A | 37Dx70L mm | 37Dx54L mm |
100:1 | 100 RPM | 220 oz-in | 5 A | 37Dx73L mm | 37Dx57L mm |
131:1 | 80 RPM | 250 oz-in | 5 A | 37Dx73L mm | 37Dx57L mm |
Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; a general recommendation for brushed DC motor operation is 25% or less of the stall current.
Details for item #2824:
Exact gear ratio: 25×30×25×4010×10×15×10=50:125×30×25×4010×10×15×10=50:1
Dimensions:
Warning: Do not screw too far into the mounting holes as the screws can hit the gears. We recommend screwing no further than 3mm (1/8") into the screw hole.
Using the Encoder:
A two-channel Hall effect encoder is used to sense the rotation of a magnetic disk on a rear protrusion of the motor shaft. The quadrature encoder provides a resolution of 64 counts per revolution of the motor shaft when counting both edges of both channels. To compute the counts per revolution of the gearbox output, multiply the gear ratio by 64. The motor/encoder has six color-coded, 11″ (28 cm) leads terminated by a 1×6 female header with a 0.1″ pitch, as shown in the main product picture. This header works with standard 0.1″ male headers and our male jumper and precrimped wires. If this header is not convenient for your application, you can pull the crimped wires out of the header or cut the header off. The following table describes the wire functions:
Color | Function |
---|---|
Red | motor power (connects to one motor terminal) |
Black | motor power (connects to the other motor terminal) |
Green | encoder GND |
Blue | encoder Vcc (3.5 – 20 V) |
Yellow | encoder A output |
White | encoder B output |
The Hall sensor requires an input voltage, Vcc, between 3.5 and 20 V and draws a maximum of 10 mA. The A and B outputs are square waves from 0 V to Vcc approximately 90° out of phase. The frequency of the transitions tells you the speed of the motor, and the order of the transitions tells you the direction. The following oscilloscope capture shows the A and B (yellow and white) encoder outputs using a motor voltage of 12 V and a Hall sensor Vcc of 5 V.
By counting both the rising and falling edges of both the A and B outputs, it is possible to get 64 counts per revolution of the motor shaft. Using just a single edge of one channel results in 16 counts per revolution of the motor shaft, so the frequency of the A output in the above oscilloscope capture is 16 times the motor rotation frequency.
Dimensions:
Size: | 37D x 70L mm1 |
---|---|
Weight: | 225 g |
Shaft diameter: | 6 mm |
General specifications:
Gear ratio: | 50:1 |
---|---|
Free-run speed @ 12V: | 200 rpm |
Free-run current @ 12V: | 300 mA |
Stall current @ 12V: | 5000 mA |
Stall torque @ 12V: | 170 oz·in |
Free-run speed @ 6V: | 100 rpm2 |
Free-run current @ 6V: | 250 mA2 |
Stall current @ 6V: | 2500 mA2 |
Stall torque @ 6V: | 85 oz·in2 |
Lead length: | 11 in |
Notes:
- 1 Length measurement does not include gearbox shaft or the raised area immediately around it.
- 2 This motor will run at 6 V but is intended for operation at 12 V.
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