Re: [CAD_CAM_EDM_DRO] Re: Fanuc 6T controller picture posted, hand wheels

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...
.

>
>
>