Re: [CAD_CAM_EDM_DRO] Quadrature?

Hi,

If I understand what you have written you would have 4000 pulses, give or
take 1 pulse, for one revolution or inch of travel of your leadscrew. This
is assuming you have the encoder wheel mounted on the leadscrew end. If it
was mounted on the servo motor the reduction in gearing will have to be
taken into account. Encoders are used for DRO's and speed and direction
input on a closed loop system be it servo or stepper. Direction can be
determined by the count from the two channels.

You choose your encoder for the job it is going to do and the speed at which
the reading machine, be it a computer or other device, can cope with. A 400
line encoder will work very well with the Gecko's when driving servos on
about 4:1 reduction, but if it positional information you want to feed a DRO
with then 2000 is better than 1000, if your reading machine can cope.

Regards,

Terry

| I understand that Quad = four. What I guess my question should have been
| was, How should I choose encoders? From what I understand, the counts per
| revolution on a rotary encoder are what determines the resolution of the
| encoder. Correct me if I'm wrong, But if you have a 1000 line encoder
and
| a 1" pich screw (hypothetically) the encoder could count exactly 1 inch
per
| revolution of your screw. Am I correct?