Re: OT: EPP problems

On Wed, 08 Feb 2006 09:00:22 +0000, Robert Baer wrote:

What is nice about your approach is that the external machine
(whatever it is) is "triggered" by the computer, so ther can be no
problems unless the triggering is too fast.
The full EPP scheme requires reading from the EPP data register, and
the machine damn well better respond within the WAIT timeput period.
And if it (randomly?) does not respond, then the software better be
designed to recognize that fact and re-try (forever??).

In any event, i got the machine to work (paper tape reader)..sort-of.
It is a mechanical problem with the stepper that advances the tape;
seems to have gotten a little rusty and only advanced sometimes.
Some WD-40 has helped considerably, but each step is like light
banging of a tuning fork - the tape "bounces" back and forth for multiple
reads (strobing on the sprocket hole) - up to 3 times for valid reads, and
up to 15 times if one looks at the photocell (ignoring threshold).


Go to the store, go directly to the store, do not pass go, well, collect
$200.00 if you can, and get some 75% or better isopropyl alcohol, and get
that WD-40 cleaned out of there. WD-40 turns to Cosmolene.[1]

After you've cleaned it up, get some sewing machine oil or good ol'
3-in-1, light machine oil.

WD-40 is for door hinges and squeaky ball joints. Vaseline is for bike
wheel bearings. ;-)

Good Luck!
Rich
[1] Cosmolene: Heavy, gooey, tenacious grease used to pack military parts
for indefinite storage.

.

Relevant Pages

  • Re: OT: EPP problems
    ... problems unless the triggering is too fast. ... The full EPP scheme requires reading from the EPP data register, ... i got the machine to work (paper tape reader)..sort-of. ... get some sewing machine oil or good ol' ...
    (sci.electronics.design)
  • Re: OT: EPP problems
    ... problems unless the triggering is too fast. ... The full EPP scheme requires reading from the EPP data register, ... get some sewing machine oil or good ol' ... WD-40 is for door hinges and squeaky ball joints. ...
    (sci.electronics.design)