Re: gEDA-user: OT - Joystick control of stepper or servo motors

[Matthew Wilkins <matthew_m_wilkins@xxxxxxxx>]

Seems like you could just use this example, add a second axis, and replace the 
potentiometer with a 2-axis joystick.

http://www.arduino.cc/en/Tutorial/StepperUnipolar

http://www.parallax.com/Portals/0/Downloads/docs/prod/sens/27800-2-AxisJoyStick-v1.0.pdf



----- Original Message ----
From: David C. Kerber <dkerber@xxxxxxxxxxxxxxxxxxxxxxxxxx>
To: gEDA user mailing list <geda-user@xxxxxxxxxxxxxx>
Sent: Mon, January 24, 2011 4:41:25 PM
Subject: Re: gEDA-user: OT - Joystick control of stepper or servo motors

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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