Re: FAILLING MEMORY ON MY CNC LATHE

Hi,
Thanks for reply. My DYNA 3000 has checkup for the RAM ,but only
list nunber of bytes on board, same for the eprom. david pontes

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett KM6VV
<KM6VV@a...> wrote:

> Hi David,
>
> If you're already having problems, and it IS the EPROMS, you don't

want

> what you have. Buy new ones, make a copy to CD, then you've got

some

> backup.
>
> I'd find a buddy who likes to build imbedded controller

applications,

> maybe even a HAM. They can use a EPROM programmer to read your

(GOOD)

> EPROMS, and save them to CD. You might be able to find an EPROM
> programmer in "Circuit Cellar" magazine (or similar). But expect

to pay

> about $50 - $100.
>
> A further note, most code stored in EPROMS is done with a checksum.
> This checksum validates the contents of the EPROMS upon startup of
> whatever "system" it is running. Someone with an EPROM programmer

can

> "read" your EPROMS, and see/verify a checksum.
>
> Thus, I'd expect a "BIOS checksum error" or similar message if you

were

> having a failure. The "BIOS" is of course the familiar name given

to

> the EPROM code in a PC. Yours will undoubtedly be different. You

could

> have bad RAM in the controller. Is there a diagnostic you can run?
> What does your service manual say?
>
> HTH
>
> Alan KM6VV
>
>
> mrdavidpontes wrote:
> >
> > Hi,
> >
> > Is it possiable to copy the programing from an EPROM and

save

> > it to an CD? I think my EPROM chips ARE SLOWING PASSING ON in my

DYNA

> > 3000 LATHE. The computer forgets a line,or a byte, then the lathe
> > just stops,it don't what to do next. A friend told me to replace

the

> > EPROM's, but how do I reinstall the program in the chips? If the
> > 27256 chips are bad in the lathe now, will I pass a bad program on
> > the new chips? Any insight will be helpfull.
> >
> > david pontes
> > mrdavidpontes@c...