Re: [CAD_CAM_EDM_DRO] Re: Interface. Gauging interest.

You might find it interesting to hear my reason for following up on the
USB strategy... It's pretty simple, actually -- my desktop computer
doesn't have a parallel port! And, I think this trend will continue
(the so-called "legacy-free designs").

For many hobbyists who have old 486/Pentium boxes around, who have more
time than money, or who want to tinker a bit, the parallel port is a
very mature, stable technology. Tinkerers can afford to tweak and
dedicate an old box for this.

On the other hand, I think there are a lot of people out there who are
not tinkerers, and they just want a mill that plugs in like a printer.
And, if you want to just plug it in and not have to mess with it, USB
can be a pretty good solution (regardless of whether the controller on
the other end of the USB wire is a smart microprocessor or a dumb FIFO).

Mike

ballendo wrote:

>>In CCED, "Jack Hudler" <yahoo@...> wrote:
>>2) Hear! Hear! This is what freaks me out about using the parallel
>>port; I would not want my Domain Server backing up my CNC machines
>
> to >wreck my machine.
>
> To which I would say:
>
> What on Earth! is your CNC machine doing running when something like
> this is even remotely possible to be happening!?!?
>
> The "problem" with using a PC as an embedded controller, is that
> folks forget that's what they've done. Then they expect to still do
> all the things they've done before...
> You've exchanged an inexpensive rather large box for the more
> expensive small box that may be a G100.
> Treat the large box embedded controller the same as you would the
> small box embedded controller.
>
> IMO THAT'S the REAL problem. Not any failing of a p-port, but rather
> a failure in the judgement of the person using it...
>
> A pc behaving as a machine controller needs the same respect you'd
> give an embedded controller like the G100. You're not going to
> expect it to do ANYTHING besides what it was designed and installed
> to do. When you treat it--and a pc par port--that way, it/they are
> reliable, repeatable, and IME without incident.
>
> Don't do that, and the fault is with you, not the hardware.
>
> Ballendo
>
>
>
>
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