Re: OK, I've got a detent encoder... What now?

--- In CAD_CAM_EDM_DRO@y..., Spehro Pefhany <speff@i...> wrote:

> At 10:13 AM 2/17/02 -0800, you wrote:
>

> That's my thought. It's the increment that matters. I don't care

how many

> grid lines are on my desktop (or how many go by when I scroll) just

that each

> one is exactly 0.01" or whatever "even" metric amount, if that

analogy works.

Having increment on a pulse wheel solves about 50% of the problem.
Having a useful number of increments per revolution, solves about 30%
more. Having both is about 80%. The other 20 % is the full 100
detents and you can then remove the cranks from your motors.

We're not talking about scrolling here, we are talking about jogging
a real machine with a specific motion needed. If you go past your
destination point, you break a bit, smash a part, crunch something.
That's different from a virtual setting where a vise and cutter can
co-exist in the same location.

>
>
> It's a < $10 part, Fred. Add a big black 30mm aluminum knob and

you're

> still under $15. The knob doesn't have a pointer because it's

incremental.

>

How much more is it with 20, 50 or 100 detents? That's the one that
I want. Otherwise I will probably make my own, because if I take the
trouble to make a pulse wheel for my mill, I want it to solve most of
my problems( my issues) with setup and fixture movement.

I'm still hoping for off the shelf plug and play interfacing to some
of the hobby controllers. I will be able to make it work with my
AHHA, but was hoping for others too.

My box will probably have, pulse wheel, pulse size selection switch,
axis selection. E-stop, feed hold and start would also be nice, but
I'm nost interested in the pulse wheel controls.

Best Regards,

Fred Smith
IMService