YFROBOT

YFROBOT Metal Gearmotor GB37-520 12V with 16 CPR Encoder Hall speed measurement

Name: YFROBOT Metal Gearmotor GB37-520 12V with 16 CPR Encoder Hall speed measurement
Brand: YFROBOT
Price: 39.0 USD
Availability: InStock

$39.00 USD

Sale Sold out

ratio 1:18 1:43.8

Product variants

Quantity

Overview

Measuring 37 mm (1.46″) in diameter, these brushed DC gearmotors are the largest and most powerful we carry. all versions are available with integrated 64 CPR quadrature encoders on the motor shafts. The 12 V motors offer approximately the same performance at their respective nominal voltages. Its motor shaft is a 6mm D-shaft.In general, these kinds of motors can run at voltages above and below the nominal voltages; lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.The gearboxes are composed mainly of spur gears, but they feature helical gears for the first stage for reduced noise and improved efficiency:

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, 8″ (20 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. 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 – 5 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 12 V motor at 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.

Precautions

This product does not have waterproof function, and it is strictly prohibited to use in water or damp environments.
Short circuit between positive and negative poles is prohibited.
Obtain information through email.

Motor parameters

Reduction Ratio	Voltage	Noload Speed (r/min)	Load Speed (r/min)	Rated Torque (kg.cm)	Rated Current (mA)	Stall Torque (kg.cm)	Stall Current (mA)	Power (W)
1:18.8	6	290	220	1.0	800	4.0	4400	5
1:18.8	12	585	440	2.0	800	8.0	4400	9
1:43.8	6	120	90	1.8	800	9.0	4400	5
1:43.8	12	250	180	3.7	800	18	4400	9

Electrical characteristics

Specification	Symbol	Test Condition	Min	Typical	Max	Unit
Input Voltage	Vcc	--	2.7	5	5.5	V
Output Saturation Voltage	Vce(sat)	VCC=14V; IC=20mA	-	300	700	mV
Output Leakage Current	Icex	VCC=14V; VCC=14V	-	<0.1	10	A
Input Current	Ice	VCC=20V, output open	-	5	10	mA
Output Rise Time	Tr	VCC=14V; RH=820Ω；CH=20pF	-	0.3	1.5	S
Output Fall Time	Tr	VCC=14V; RL=820Ω；CL=20pF	-	0.3	1.5	S
Operating Temperature Range	Topr		0-85			℃