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This is the motor and encoder portion of our 37D mm metal gearmotors with 64 CPR encoders.
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 motor with integrated 64 CPR (counts per revolution) quadrature encoder is intended as a replacement motor and encoder for our 37D mm metal gearmotors. The 2mm output shaft has a non-removable pinion gear that works with all of our 37D mm gearmotor gearboxes. Note that we do not sell the 37D mm gearboxes separately, but if you have a gearmotor with a damaged motor or encoder (or if you want to effectively add an encoder to a version without an encoder), you can transfer the gearbox to this replacement motor.
The motor has a diameter of 34.5 mm (1.36 in) and a length of approximately 44 mm (1.7 in) from the top of the motor can to the bottom of the encoder. The top of the motor has six mounting holes evenly spaced around the outer edge threaded for M2.5 screws. These mounting holes form a regular hexagon, with the center of each hole located 13 mm from the center of the output shaft.. The mounting holes have a depth of approximately 3.5 mm.
Pinion Gear Specs
- Metric with module m = 0.5
- Number of teeth: 10
- Face thickness: 4 mm
- Pressure angle: 20°
- Gear position: 9 mm from top of motor to top of gear
Gearmotor Options
You will typically want to combine this motor with a gearbox to give it a more appropriate combination of torque and speed (without a gearbox, it offers very high speed with very low torque). Our 37D mm line of metal gearmotors consist of this motor combined with different gearboxes. We do not carry the gearboxes by themselves, so unless you are looking at this as a replacement motor for a compatible gearbox you already have, we strongly recommend you consider getting a preassembled gearmotor with the gear ratio that best suits your project requirements.
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.
This motor is intended for use at 12 V, though in general, these kinds of motors can run at voltages above and below the nominal voltage (this motor can begin rotating at voltages as low as 1 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.
This motor is functionally identical to the previous version we carried without end caps (it is the same motor and encoder). The black plastic end cap is easily removable if you need to access the encoder or want to slightly reduce the overall motor size, but there is a little bit of base plastic that will remain, as can be seen in the pictures below that show this motor combined with a gearbox:
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: | 34.5D x 46.5L mm1 |
---|---|
Weight: | 110 g |
General specifications
Gear ratio: | 1:12 |
---|---|
Free-run speed @ 12V: | 11000 rpm |
Free-run current @ 12V: | 300 mA |
Stall current @ 12V: | 5000 mA |
Stall torque @ 12V: | 5 oz·in |
Free-run speed @ 6V: | 5500 rpm3 |
Free-run current @ 6V: | 250 mA3 |
Stall current @ 6V: | 2500 mA3 |
Stall torque @ 6V: | 2.5 oz·in3 |
Lead length: | 11 in |
Notes
- 1 Length measurement does not include motor shaft or pinion gear.
- 2 This motor does not have a gearbox.
- 3 This motor will run at 6 V but is intended for operation at 12 V.
Data sheet
- DC motor power
- Other
- Gear material
- Brak przekładni
- Gear ratio
- Brak przekładni
- Rotation speed
- 11000RPM
- Shaft diameter
- 6,4 mm
- Shaft shape
- Pinion gear
- Obustronny wał silnika
- Tak
- Power supply voltage
- 12V
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