Re: [CAD_CAM_EDM_DRO] Gecko 5V supply using game port/ XY joystick jogging

Game port pot use?

Some things to consider:

The newer computers are dropping the game port in favor of USB, are they
not?

The pot control of the game port is very crude, and unreliable. I have used
it for jog control and am turning away from it for safety reasons.

The CH products Game port board (ISA slot based) only works up to 600 mhz.
The newer computers are dropping the ISA slot too.

I suppose the game port could be used if some of the smart guys on this
forum developed a pci card which ran with better drivers than are normally
available.

On the other hand, I guess for hobby use, there will be PC motherboards
around with these features for another year or so. Then the consumer based
industry will leave us behind, or we will have to pay more for our
"industrial" PC motherboards.

Just some thoughts.

Tom

----- Original Message -----
From: Doug Fortune <pentam@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, April 02, 2001 12:29 AM
Subject: [CAD_CAM_EDM_DRO] Gecko 5V supply using game port/ XY joystick
jogging


>
> jvicars@... wrote:
> >The Gecko 201 manual says that the 5V for step and direction must come
> >from the indexer/pulse source. I.E. the computer. Can you get 5V through
> >the parallel port somehow, or do you have to run a 5V line from the
> > computer to the drivers? Anybody have advice on how to hook this up?
>
>
> mariss92705@... wrote:
>
> > Most PCs have a game port. The +5VDC is available on .. the game port.
>
> Hi Joe:
>
> This is exactly (among others) the reason why I recently (March 28/2001)
> announced how to wire up the pBREAK to the game port - see diagram at:
>
>
http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/CIRCUITS/parallel_to_gam
eport_pinout.gif
>
> To review - the 25 pin parallel port is broken out into a ground, 12
output bits
> and 5 input bits, leaving 25-18= 7 redundant ground lines in the parallel
cable.
> If we tap into the game port, we can get +5 & GND extremely neatly.
>
> The +5 is sent down the parallel cable, and is available to the Gecko's at
> the far (equipment) end, where you breakout the signals there to the Gecko
> +5, GND and logic signals.
>
> That answers your question on where to get the +5 for the Gecko's
> (or various other purposes). See my website for a picture of a
> parallel/gameport wired setup for exactly this purpose.
>
> - - - -
>
> However, if I may ramble, there are a total of four additional input bits
> and four input potentiometers on the gameport, which we now have nearly
> free access to. We can use the four additional input bits, and we can
also
> use one (of the four) potentiometers for (say) feedrate over-ride (but
we'll
> need to wait for the software guys to implement that).
>
> Using 2 pots for XY joystick control:
> Or perhaps, use two lines for two potentiometers (leaving 3 input bits).
> Or perhaps, skip the GND (use the parallel port GND), use two input
> pots and 4 input bits.
>
> I understand EMC is close to supporting XY joystick jogging.
>
> If it were me implementing the control panel, I'd keep the X pot separate
> from the Y pot (rather than combined into a single joystick), so that
> linear manual moves in one axis (say X) don't result in accidental moves
> in the other axis (ie you might get a jog instead of a straight cut!).
>
> Doug Fortune
> http://www.cncKITS.com
>
>
>
>
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