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

Marcus,

It's not the most important thing in the world, you are right.
I was saying almost all "pro" CNC jog dials have 100 detents.
You could have more, or less if that is all you could find.
It's true that as long as it "clicks" once for each increment, you
will be ok.
My point was more along the issue of increments being in 10's and the
wheel being detented in a factor of 10 for ease of calculations.
However, if you could find something with an increment of 100, then
it's nice because you know one turn equals 1 inch...etc.

Cheers!
Sean

--- In CAD_CAM_EDM_DRO@y..., "Marcus & Eva" <implmex@a...> wrote:
> Hi Sean:
> If they all have 100 increments per turn then they need to have
100
> increment encoders on them (if I understand correctly)
> Somewhere back in this thread I believe I heard the comment that 100
> increment encoders are expensive oddballs.
> My comments were, that as a user, I don't care whether there are 100
> increments per turn or 180 or 36.
> In lots of years of machining it's never mattered even once for me.
>
> So, by inference, a standard cheapjack encoder for the budget
conscious
> should be just ducky for the job of a jogwheel so long as the
software makes
> it move an even increment for each slot in the encoder.
> Remember, I'm talking now about cobbling together a homebrew
system, not
> retrofitting an existing control that already has a 100 increment
encoder on
> it.
>
> Purely for convenience, the increment is nice to have at decimal
fractions
> of an inch, but only when you use it as I have described in a
previous post.
> When you want to know where you are, you look at the display; you
don't need
> to count handwheel rotations.
> Cheers
>
> Marcus
>
>
> ----- Original Message -----
> From: "audiomaker2000" <audiomaker@s...>
> To: <CAD_CAM_EDM_DRO@y...>
> Sent: Sunday, February 17, 2002 3:50 PM
> Subject: [CAD_CAM_EDM_DRO] Re: OK, I've got a detent encoder...
Hello?
>
>
> > Um...is anyone listening here?
> >
> > There are reasons why "real" CNC machines have certain standard
jog
> > increments attached to the jog wheel.
> >
> > They are...
> >
> > ..01
> > ..001
> > ..0001
> >
> > At .01 per detent you can move the table quite quickly...even too
> > quickly.
> > Once you get close, you switch to .001, and if your machine is
> > capable, you can go .0001 when you are really on it.
> >
> > Sure, you could make a program do 26 feet per increment, but it's
> > really dangerous and so most don't even give that option. They
also
> > don't give the option to type your own in case you forget a
decimal
> > place..or get stupid and type in something dangerous.
> > The 3 standard increments are also set 10X apart for easy
> > calculations so you don't screw up by trying to calulate things
> > like .875 X increment to get where you are going.
> > Jog wheels ALL have 100 increments (or 99 if you like).
> >
> > Remember, this is a *jog* wheel we are talking about here. It is
used
> > for setting up the work and the machine, not for machining. It is
not
> > a substitute for a "hand wheel".
> >
> > A "hand wheel" would have no increments or detents, and could
easily
> > be made with a mouse encoder. A hand wheel (or "handwheel") is
> > controlled by the feedrate, which a "jog wheel" is not. One is
not a
> > substitute for the other. Although they look similar, and both
move
> > the axes, they are completely different.
> >
> > :-)
> > Sean