Actually, my first thought was to use an analog joystick, since I
have one floating around somewhere, but I thought there would be
more USB host controllers around for reasonable prices. It's not
looking like that so far, so I may go with the analog option. If I
do, then I have to be able to tranlate the pot value of the joystick
to a speed signal for the drive motor.
I'm still in the very early stages of this project, so pretty much
everything is up in the air at the moment.
D
> -----Original Message-----
> From: geda-user-bounces@xxxxxxxxxxxxxx
> [mailto:geda-user-bounces@xxxxxxxxxxxxxx] On Behalf Of Colin D Bennett
> Sent: Monday, January 24, 2011 3:25 PM
> To: geda-user@xxxxxxxxxxxxxx
> Subject: Re: gEDA-user: OT - Joystick control of stepper or
> servo motors
>
> On Mon, 24 Jan 2011 10:19:53 -0500
> "David C. Kerber" <dkerber@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> > Hi, electronics gurus! I'm looking for suggestions on the best
> > inexpensive way to use a USB game joystick to control
> stepper or servo
> > motors.
> >
> > The application is using a joystick to drive the the platform
> > positioning knobs on a microscope, to help me keep the
> subjects in the
> > field of view, while I'm photographing them. I'll also be
> adding the
> > ability to trigger the camera shutter with the joy stick,
> but I don't
> > anticipate any trouble with that part; it's the motion control side
> > that I have no experience with.
>
> As far as the joystick goes, you might try to find a non-USB joystick.
> Maybe use a PlayStation 2 controller (two analog joysticks
> and multiple buttons for extra control features) or find a
> cheap analog PC joystick.
> Using USB where it's not suitable means you have a lot of
> extra complexity and overhead.
>
> Regards,
> Colin
>
>
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