Re: mounting encoder with pulley

> >
> I know there are difficulties - that's why I've responded to

several

> people saying that input multipliers are the better answer. I do

have a

> situation that suggests using an encoder divider, though.
>
> The method I would use would be to do the full 4X decoding (or

possibly

> just use the encoder phases as step and direction signals, giving a
> "free" divide by 4), then divide down the resulting count. This

counter

> would then drive a set of quadrature signals - essentially, I would
> decode the encoder pulses, divide the decoded count, then output a

set

> of faked quadrature signals with the divided count. I think I

would do

> this with a microcontroller, so I could have better control of the
> divide ratio, and different options for output. It's probably

possible

> in discrete logic, but I'm a software guy. :)
>

Awh, you software guys are all the same ! 9;-) I think in terms of
hardware being from that school then add in software to do things
that are not economically done in hardware. I think I would start
out with a simple divided by 10 chip or something like a CD4029
presetabble counter) and be able to pick off the divide ratio I
wanted. Divide each signal then recombine them to give you the
quadrature signal. As long as the timing relationships (both signals
go through the same signal conditions) then it might work. It would
take some time with a plug board and a dual trace scope but it just
might work.

I know its a PITA to remove/add/modify stuff on the motors but that's
what we HSCNC'ers do! We trade our (low cost) labor for just buying
the right motor/encoder to begin with. I spend most of my time
designing and making special brackets and plates so I can use the
surplus stuff I have scrounged!