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170RPM 37DL Gear Motor with Position Encoder
Product ID: NR-GMD-OENC37D-170
Weight: 320 gms
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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.
Motor with Motor Mount and Precision Aluminium Alloy Wheel
One 170RPM 37DL Gear Motor with Position Encoder
Six M3, 5mm bolts
One motor mounting clamp
Recommended Motor Dirver:
8V-28V, 5Amp Dual DC Motor Driver with Current Sense
Hercules Lite 6V-16V, 8Amp Motor Driver with Current Sensing
72mm Dia. x 20mm Thick, 6mm Bore Precision Aluminum Alloy 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.
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.
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.
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.Visit forum for Online Discussion on this product
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