Re: [CAD_CAM_EDM_DRO] Testing encoders on the "bench"

On Wed, 13 Aug 2003, mueller914 wrote:

> The problem is some of them "might" have bad encoders, so how could I
> test them on my work bench? Is there a simple circut I can build and
> plug into the motor harness to check that the encoder is working
> correctly?

You can test the encoders (assuming they are optical) by wiring power and
two leds to the outputs. Then attach a long pointer (30cm/1foot) to the
axle and turn it slowly. The leds should blink showing the encoders do not
miss pulses. The long arm is so you can turn it slowly enough not to miss
positions. 500CPR will give almost half a degree per pulse so with the 30
cm arm each half degree will be about 2mm, this is easy to reolve by hand.

Peter