Re: Lexmark Z65 4800 DPI printer

[SKID Photography <skid@bway.net>]

Laurie,
Gee, I wasn't even referring to the step motors, I was stuck with your
insistence that the higher resolution went they way the paper traveled and not
the way the head moved.  Especially since it's already been discussed
(recently).

And BTW:  It is not my responsibility to explain anything to you, and I thought
that I was responding in kind.

Finally, moving sheets of paper (of varying thickness, and composition) is a
much more difficult task than precision controlling a device along a fixed metal
rail.

Harvey Ferdschneider
partner, SKID Photography, NYC

> Well pardon me.  I am sorry that you seem to seek to take such an
> adversarial position.  I am perfectly willing to leave it at you knowing all
> there is to know and I knowing all the rest. :-)
>
> To the best of my knowledge, neither you nor anyone else has provided any
> data or evidence that step motors cannot effieciently or cost-effecively be
> made to move paper in a precise incremental way; so I will stand by my
> statement that until further information is provided, we do not know one way
> or the other if it is possible (with we being the general royal "we" from
> which you may be excused as a member of that group). As best, it appears
> that all we can possibly say is that such an efficient and cost effective
> step motor system has not yet been developed,has not yet been implemented,
> or does not currently exist.  This says nothing about the possibility -
> current or future.  While there may be literature based on theorwetical or
> empirical study and research that finds it to be impossible to further
> develop or implement step motor systems beyond the current operational
> limitations, I am unaware of it nor has anyone referred to such
> documentation in any of the discussions of step motors that I have seen.
>
> > -----Original Message-----
> > From: owner-epson-inkjet@leben.com
> > [mailto:owner-epson-inkjet@leben.com]On Behalf Of SKID Photography
> > Sent: Wednesday, June 05, 2002 12:47 AM
> > To: epson-inkjet@leben.com
> > Subject: Re: Lexmark Z65 4800 DPI printer
> >
> >
> > Laurie,
> > Speak for yourself only, please.  I think it's you who does
> > not know about the
> > limitations of stepping motors etc., not 'we'.
> >
> > Harvey Ferdschneider
> > partner, SKID Photography, NYC
> >
> > > Well, you do make some good points as does Paul.  As, I
> > said earlier, I am
> > > willing to admit that I may be wrong; but I also felt an
> > obligation to give
> > > some of the reasoning behind my statements.  At this stage,
> > until further
> > > information becomes available, I guess we really do not
> > know if step motors
> > > for moving paper can or cannot effectively and cost
> > efficiently be made to
> > > move the paper in small accurrate increments or not, given
> > that in a scanner
> > > it can move the sensors along guide rails in small precise
> > increments.  I am
> > > certainly open to correction and learning if the higher
> > specs are the
> > > governing ones for the wide dimension of the media or not.
> > >
> > > -----Original Message-----
> > > From: owner-epson-inkjet@leben.com
> > > [mailto:owner-epson-inkjet@leben.com]On Behalf Of SKID Photography
> > > Sent: Tuesday, June 04, 2002 5:02 PM
> > > To: epson-inkjet@leben.com
> > > Subject: Re: Lexmark Z65 4800 DPI printer
> > >
> > > But on an inkjet printer (as opposed to a scanner), you are
> > essentially
> > > using
> > > two different types of stepping motors.  One moves the
> > paper, and the other
> > > moves the ink heads along the paper.
> > >
> > > I believe that Epson partially achieves the highest dpi
> > numbers (along the
> > > direction that the print head travels) by 'double' printing
> > (at least 2
> > > passes).
> > >
> > > Whereas moving the paper along extremely small (and
> > accurate) increments is
> > > more
> > > difficult to achieve, hence the lower resolution.
> > >
> > > Harvey Ferdschneider
> > > partner, SKID Photography, NYC
> > >
> > > "Paul D. DeRocco" wrote:
> > >
> > > > That would make sense to me, especially for scanners.
> > Making smaller CCD
> > > > elements is a big deal; making a stepper motor move in
> > finer increments
> > > > isn't.
> > > >
> > > > --
> > > >
> > > > Ciao,               Paul D. DeRocco
> > > > Paul               mailto:pderocco@ix.netcom.com
> > > >
> > > > > From: Laurie Solomon
> > > > >
> > > > > It could be that I have it backwards; but that is not my
> > > > > understanding.  My
> > > > > understanding is that the higher number in both the
> > case of scanners and
> > > > > printers reflects the long edge of the media and typically is a
> > > > > multiple of
> > > > > the lower number for the short edge that is a result fo
> > the stepper
> > > motor
> > > > > which either puches the paper thru the device in steps
> > or runs the
> > > scanner
> > > > > sensors or printhead down the media.



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