[Yaaarc] robotics - H-bridges -wheelchair motors

[Ran Ong]

Thanks for you suggestion.

I'm not "techie" guy in terms of electronics but once i have a circuit diagram  i can make a PCB and of course I know  how to solder :)

i have some reference from what you are suggesting ..similar to this idea.

http://members.iinet.net.au/~tnpshow/RCLM/electronics.htm

Is there any other solution of controlling 24v motors using RC and serial (PC) with application that is a cheaper than roboteq.

\ran
 

> From: acti at provide.net
> Subject: Re: [Yaaarc] robotics - H-bridges -wheelchair motors
> To: yaaarc at hamjudo.com
> Date: Sat, 1 Dec 2007 15:18:15 -0500
> 
> Ran Ong <ongrb at msn.com> wrote:
> > i want to build a remote controlled personal rover using wheelchair motors.
> > this is for a hobby.
> > What i have right now
> > 
> > complete working powered wheelchair : jazzy 1120
> > - a pair of 24 volt pride mobility motors (HT) 
> > - pride dynamics motor controller (complete)
> > others:
> > 2 channel remote controller
> >  
> > What kind of solution I'm looking for:
> > 
> > There are available motor controller that can be interface to 
> > wheelchair motors and connect an RC module (servo controller). 
> > I've see one solutions from www.roboteq.com using their ax3500 
> > or ax2500 module to interface both a PC or RC module attached to it.
> > from this base you can add other robotics sensors and monitors...
> > 
> > Now just wondering if there are people in this list  using a different 
> > solution as the roboteq modules are expensive.
> 
> How's your electronics background?
> 
> Personally, since this for hobby and you already have some controllers 
> capable of driving the motors (they came with the wheelchair), *IF* 
> you're comfortable with it my first thought would be to keep the original 
> controllers and trying to hack an interface to them to allow it to be 
> driven via RC.  Tap in either (a) at the joystick connector level, or 
> (b) tie into the controller just *before* the H-bridge's driver amps.
> (It''s often not too difficult to reverse engineer the joystick handles, 
> and the H-bridge itself.)
> 
> That may turn out to be a lot cheaper than replacing the pair of controllers.
> 
> - Keith Mc.
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