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: [email protected] > [mailto:[email protected]] On Behalf Of Colin D Bennett > Sent: Monday, January 24, 2011 3:25 PM > To: [email protected] > Subject: Re: gEDA-user: OT - Joystick control of stepper or > servo motors > > On Mon, 24 Jan 2011 10:19:53 -0500 > "David C. Kerber" <[email protected]> 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 > > > _______________________________________________ > geda-user mailing list > [email protected] > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user > _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
