On Sat, 2010-09-18 at 11:45 -0400, Mark Wendt (Contractor) wrote:
> Dave,
> 
>          Thanks for the suggestions.  Problem with the board the way 
> it is, is the DB25 connectors are on opposite sides of the board.  A 
> much better design would have had the DB 25 connectors mounted on the 
> same side, so that you or I could mount the board to the control box 
> case, and have the cables from both the computer and the MPG connect 
> to the board from outside the control box.  As it is, there's 
> practically no easy way to mount the damn thing and make for a clean 
> cable hookup.  Here's a picture of the thing:
> 
> <http://www.cnc4pc.com/Store/osc/product_info.php?cPath=40&products_id=159>
> 
> Mark

It might be easy enough to make your own buffer board. It just needs one
or two 74xx24x buffer chips, voltage regulator (maybe), a few
capacitors, some pull-up resistors, and instead of DB-25's, some 26 pin
dual row connectors, all on a perfboard. You may be able to piggy back
the board onto a parallel port PCI card, or build it on a PCI perfboard
with a short ribbon cable(s) to the parallel port card. You would need
enough PCI slots, but I don't carry my CNC around with me on a key
chain, so I tend to use ATX motherboards with plenty of slots.
-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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