Re: [CAD_CAM_EDM_DRO] Re: not working!

Jan, Terry, et. al.

Jan' right! the "data" sheet for the MAXNC-PRO says pin 18 is "all
signals gnd", while 19-25 are "NONE" (this is NOT to the IBM spec).
Actually it depends not upon the MAXNC "data" sheet, but rather on the
layout of the parallel port (mother board, I/O card). SIIG's I/O Board
(serial/parallel) for example, DOES show 18-25 as grounds.

I suggest that a SEPARATE I/O card is used, If it is fried, it's cheaper
then a new mother board! DO "ohm out" the ground lines (with power
off). The DC return (Black power supply leads) and the ground traces on
the board/mother board should be seen to go to one or (hopefully) more
LPT connector leads (use as many ground wires as possible). Best bet,
try to find an I/O board WITH a schematic! Stay away from the shell of
the connector. Use the connector pins.

Alan



JanRwl@... wrote:

>
> In a message dated 8/3/00 10:12:09 PM Central Daylight Time,
> bobach@... writes:
>
> << Use any pin # 18 thru 25 on the parallel port for signal ground. >>
>
> Like I said to Mr.C, often, only ONE of those 8 pins are actually
> connected across from one connector to the other! Best, TEST each for
> continuity, first! If not molded in a gob of plastic, solder a jumper among
> all-8, so any-one is true-ground!
>
>
>
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