Re: Fanuc 6T controller picture posted, hand wheels

Hi Larry,

Yes, I remember a discussion on using a stepper for an encoder some time
ago on the list. This would make a nice knob! The panel shaft encoders
I have been playing around with have a little "feel", but nowhere like
that of a stepper. I suppose we could play with using a stepper for
this.

Alan KM6VV


Larry Van Duyn wrote:

>
> Alan Marconett KM6VV wrote:
>
> >Hi Fred,
> >
> >Are you saying that the pulse generating hand wheels actually have some
> >force feedback, or that you can feel the steps (detents?) of the
> >encoder? So once zeroed, their scales remain accurate to position, just
> >like a manual mill? "Just getting motion" when one turns the handwheel
> >is less then desired, I take it? Things just got a little tougher!
> >
> >Best regards,
> >
> >Alan KM6VV
> >
> Alan.....
> My controller is an AB 8400MP (Fred has one of these also) which
> uses a stepper motor for handwheel input. The
> magnetic cogging provides the detent feel.. The stepper is connected to
> a small circuit card which generates the
> normal quadrature signals for the control.. The feedrate overide switch
> determines what each detent is equal to - from
> (I think) 50 thou per down to 1/2 thou per step.. Works very well and
> has a very positive feel...
> Larry...