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You are here: Home Products Motors and Accessories DC Gear Motors with Position Encoder 170RPM 37DL Gear Motor with Position Encoder
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170RPM 37DL Gear Motor with Position Encoder
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170RPM 37DL Gear Motor with Position Encoder

Product ID: NR-GMD-OENC37D-170
Weight: 320 gms
Price: Rs.3,267.59

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Introduction:

170RPM 37DL gear motor with position encoder is a high performance DC gear motor with optical position encoder. It gives 900 pulses per revolution of the output shaft. Motor can run smoothly from 4V to 12V. Position encoders are used in applications that requires precise angle of rotation of the motor such as robotics, CNC, automation etc.

Specifications:

  • Supply: 12V (Motor runs smoothly from 4V to12V)
  • Position encoder resolution: 900 pulses per revolution of the output shaft
  • RPM: 170RPM @ 12V; 83RPM @6V (+/-15%)
  • Stall Torque: 15kg/cm @ 12V; 7.5kg/cm @ 6V
  • Stall Current: 1.8A @ 12V; 0.8A @ 6V
  • Diameter: 37mm
  • Length: 136mm
  • Shaft diameter: 6mm
  • Gear ratio: 1:30
  • Position encoder supply: 4.5V or 5.5V
  • Position encoder current requirement: 10mA to 20mA
motor_clamp
motor_wheel

Motor with Motor Mount and Precision Aluminium Alloy Wheel


Kit contains:

One 170RPM 37DL Gear Motor with Position Encoder
Six M3, 5mm bolts
One motor mounting clamp

Dimensions:

dim_170_enc

Recommended Motor Dirver:

8V-28V, 5Amp Dual DC Motor Driver with Current Sense
Hercules Lite 6V-16V, 8Amp Motor Driver with Current Sensing

Recommended Wheels:

72mm Dia. x 20mm Thick, 6mm Bore Precision Aluminum Alloy Wheel
Universal Wheel
70mm Diameter x 19mm Thick x 6mm Bore Wheel
70mm Diameter x 36mm Thick x 6mm Bore Wheel
109mm Diameter x 21mm Thick x 6mm Bore Wheel
106mm Diameter x 44mm Thick x 6mm Bore Wheel

Position encoder output waveform:

37DL gear motor's optical encoder gives two outputs (Channel A and Channel B) which are out of phase depending on the direction of the rotation. Direction of rotation can be identified by checking which channel's waveform leads or lags with respect to each other.

cro_output

Channel A and Channel B outputs observed on CRO

Note: Phase difference between the channel A and channel B is approximately 200uS. It may change +/- 50% depending on the construction of the encoder.

Interfacing:

Sturdy 2510 relimate connector is used for position encoder signals and motor power. Position encoder can be powered within 4.5V to 5.5V DC. The output of optical position encoder has internal 10 kilo Ohm pull-up resistors to Vcc which can directly drive TTL loads.

Green
Motor power 1
Yellow
Motor power 2
Orange
Position encoder Vcc (5V)
Red
Position encoder ground
Brown
Channel A output
Black
Channel B output

Noise reduction:

When motors are controlled in closed loop using pulse width modulation with feedback from position encoder, it generate huge amount of electrical and RF noise. If this noise is not kept in control it interferes with analog/digital electronics, wireless communications etc. Sometimes it even causes to micro controller to reset abruptly. Use following methods to reduce electrical and RF noise.

In extremely noisy environment noise gets added to the square wave output of the position encoder. At very high RPM square wave output becomes trapezoidal. To remove these bad effects use Schmitt trigger buffer such as CD40106 between position encoder and microcontroller for glitch free perfectly square wave output. Schmitt trigger buffer has hysteresis which removes ringing and converts trapezoidal wave back to square wave very effectively.


schmit_trigger

Noise can be significantly reduced by shielding motor's power cable. Use coaxial cable for motor's power cables. Make sure that shielding of the cable is soldered to the motor case and shielding is grounded on the both side.

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Millennium Business Park,
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