Pendant

On 4 Sep 1999 10:16:49 -0000, you wrote:

>I have started a web page on the pendent project as conceived by Mo. It has
>a circuit diagram, brief explanation, and picture of the project to date.
>You can check it out on my web site http://www.ktmarketing.com go to the
>Home Machining page and select the link titled "Info and pictures of the
>manual pendent I am building". It is the last one in the top group.
>
>BTW, the same idea will work with any brand of PC based controller software.
>The only change is to what keys control what function.

Thanks for the info above. This is high [ read within a couple of weeks ] on my
to do list.
I was actually going to go that way and have already perloined a card and lead
from an old keyboard.
I hadn't thought about a change over switch though and that has given me some
ideas. Also I didn't realise that you only need to change over 2 wires.
What I propose to do is build an interface junction box as in the drawing and
fit this on the side of the machine, next to the monitor but fit the change over
switch in this box not the pendant. I will then connect the switch to a spring
loaded hook arrangement so that when the pendant is on the hook the keyboard
works, when you take it off the hook to use it the switch changes over and the
pendant is active
I run a Beaver CNC with the AHHA setup and a pendant is very usefull when
setting up.
I am still working on the layout of keys to suit as the AHHA makes use of ALT,
CTL, and Shift a lot.
Ahha also use the plus and minus keys on the numerical pad to alter feed rate in
a move.

Info time now. On the board I have there are 5 wires
Black goes to ground on the board and the other 4 go to a socket.
I have tried tracing them but they go to either small surface components or a
small IC and not straight to the main chip.
They are coloured Yellow, White, Red, Black any clues which they are ?
This is a PS2 keyboard and I will be fitting it into a 5 pin din set up.
Will this fit ??
--
Regards,
John Stevenson
Nottingham, England