What advantage might there be to having the encoder located on the motor side of the gearhead instead of at the output shaft of the gearhead (in other words so that it would rotate at the speed of the armature rather than at the speed of the output shaft of the gearhead) ?

Question

Jamar Wiggins

Engineering

19 December, 23:22

What advantage might there be to having the encoder located on the motor side of the gearhead instead of at the output shaft of the gearhead (in other words so that it would rotate at the speed of the armature rather than at the speed of the output shaft of the gearhead) ?

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Jaiden Marshall · Answer 1

The most accurate answer to that process is definitely precision. The Rotary encoder is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals. The efficiency of these devices is subject to the position and angle of the axis in front of the encoder.

Most cars use reduction systems in their gearboxes that convert a certain signal input into an output. Mechanically for example, a 20: 1 reduction box already infers that if there is a revolution in the input at the output there are 20. That same transferred to the encoder pulses would imply greater precision.

For example a decoder with 50 holes would have to read 1000 pulses (50 * 20) which is basically a degree of accuracy of 0.36 degrees. In this way it is possible to conclude that if the assembly of the encoder is carried out next to the motor and not at the output, it can be provided with greater precision at the time of reading.