Joystick for commercial use

Archiver

At 09:29 AM 12/1/03 +0200, Michalis Vrakidis wrote:
>I would like to use for my project a Joystic (for commercial use )
>I need some technical specification
>if anyone has an idea please let me know.
>thanks!
>Michalis

Technical specifications on what ?



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Archiver

Thanks for your answer Bruce,

As I know the Easy-Lifts (big lifts for container boxes 40 tons)
the operator drives this vehicle via a Joystick. This Joystick sent commands
(via
an electronic box) to the electrohydravlic valves and the vehicle goes
forward or backward or left or right.

I would like to replace the old electronics with new, like a stamp PLC. For
this
I would like to know some technical information about the Joysticks and how
to connect them with the stamp PLC.

---

Original Message

---

From: "Bruce Bates" <bvbates@u...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, December 01, 2003 9:39 AM
Subject: Re: [noparse][[/noparse]basicstamps] Joystick for commercial use


> At 09:29 AM 12/1/03 +0200, Michalis Vrakidis wrote:
> >I would like to use for my project a Joystic (for commercial use )
> >I need some technical specification
> >if anyone has an idea please let me know.
> >thanks!
> >Michalis
>
> Technical specifications on what ?
>
>
>
> >To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> >from the same email address that you subscribed. Text in the Subject and
> >Body of the message will be ignored.
> >
> >
> >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Archiver

At 09:12 PM 12/1/03 +0200, Michalis Vrakidis wrote:
>Thanks for your answer Bruce,
>
>As I know the Easy-Lifts (big lifts for container boxes 40 tons)
>the operator drives this vehicle via a Joystick. This Joystick sent commands
>(via
>an electronic box) to the electrohydravlic valves and the vehicle goes
>forward or backward or left or right.
>
>I would like to replace the old electronics with new, like a stamp PLC. For
>this
>I would like to know some technical information about the Joysticks and how
>to connect them with the stamp PLC.

Just in general terms a joystick is nothing more than two variable
resistors, one on the horizontal plane, and one on the vertical plane
(stick facing towards you).
One needs to determine the instantaneous resistance of each of these planes to
determine the joystick position at any given moment in time.

Your best bet, just for testing and prototyping purposes is just to use a PC
joystick which operates using these same principles. Once you get that
operational, then begin to be concerned about exactness, response times, and
things of that nature. If you'd already been this route, I apologize.

I might also mention just for completeness that industrial joysticks may be
"gated". That is to say that their movement may be purposely restricted due
to the operational needs of the system. This gating can be in one or more of
the 8 directions which a joystick generally controls.

If less control than the above is required, 8 finite positions can be
detected with 4 well placed micro-switches within a base unit. I'll look
for a link I had which shows a picture of that type of operation.

I hope that was helpful.

Regards,

Bruce Bates