Re: [CAD_CAM_EDM_DRO] Linux USB

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