Digital BW, The Print

Hi Bob,

How about for the horizontal head movement?  That's not a stepper?  Paper
advance makes sense to use an encoder...

Anyway, that resolution, 1/180" isn't the critical one, but makes perfect
sense...check as well the resolution of the head spacing.  It should be in
the service manual.

My point is, these things are hardware limited, and can't be "over ridden"
by software.

Regards,

Austin


> Austin,
>
> Sorry for the delay in replying - been away. My 1270 and 1290
> definitely do
> not have stepper motors, but use encoders as you suggest. The
> service manual
> for the 1270 states that the encoder sensors have a minimum resolution
> (carriage and paper motor encoders) of 1/180". Haven't got a
> manual for the
> 1290 yet.
>
> Bob Frost.
>
> ----- Original Message -----
> From: "Austin Franklin" <darkroom@...>
>
>
> > Hi Gus,
> >
> > The limitation is going to be more than firmware, but mechanical.  The
> motor
> > only has so much resolution if it's a stepper, and if it uses encoders
> > (which it does I believe, on the 3000 for the paper advance at least),
> your
> > resolution is that of the encoder, period.  Firmware or special commands
> > can't override the mechanicals!
> >
> > >From what I understand, the only way to get 1440 is using
> "micro weave".
> If
> > you want a copy of the ESC/P command set, you can get it from the Epson
> > developers site...but that's not all there is, as apparently there are
> more
> > undocumented commands, unless you're on NDA with Epson...but
> still, those
> > commands can't override the mechanical limits of the printer.
>
>
>
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