Re: [CAD_CAM_EDM_DRO] Linux USB

Hi Jon,

How about using a panel shaft encoder, read in to two of the switch
imports, and two PB's into the other pair. The encoder is easy enough
to read by software, and the PB's are used to "roll" a jog rate parm,
and an axis parm. I've done it, and have been trying it out.

Alan KM6VV


Jon Elson wrote:

>
> Weyland wrote:
>
> > From: "William Scalione" <wscalione@...>
> >
> > > I'm in the process of doing the same thing, but going at it from
> > > a different angle. I am going to biild the circuit seen here at
> > > http://home.t-online.de/home/stephan.hans/tricks.htm#spinnerinterface
> > > which will allow the pc to boot with 2 regular keyboards connected.
> > > Took one keyboard apart and will interface to the circuit board in that
> > > one, the other keyboard will be used as is. I'm going to use a Joystick
> > > for the X and Y axis'. They have joysticks that have switches instead of
> > > pots so it should be simple enough.
> >
> > Pardon my ignorance with things circuited, but if your thinking of
> > using the joystick to control the table for positioning the table
> > like jog buttons, I think this is a great idea.
>
> The problem with the standard PC joysticks is that they are a HIDEOUS
> way of doing it, and the center (zero) point drifts all over the place, as
> well as having erratic full-scale pulses due to 'noisy' pots. A decent
> 8-bit ADC, even, would be a huge improvement. I want to do a pendant
> interface after I get all the important, basic stuff going on my parallel
> port axis control set.
>
> Jon