[sane-devel] Medion MD9850: scan range & noise probs?
Thu, 30 Oct 2003 12:34:31 +0100
Henning Meier-Geinitz wrote:
> Maybe it's just backtracking? I.e. the scanner is too fast for the
> parallel port. Does the scan head stop shortly when the noise occurs?
> Or does it even move backe some milimeters?
Hmmm... hard to say, the steps are very small, ofc. It doesn't move
back. I'd say that it... uh... hesitates in a way (maybe sometimes stops
for a split-second) *after* 2 or 3 consecutive "clanks". I.e. the step
rate remains the same but the steps get smaller for a while (you canhear
that by the synchronous "uk-uk-uk-.." sound of the stepping motor). It
definitely doesn't stop *at* a "clank", anyway.
The result is that if it "clanks" at a certain line of scanned text, the
image is vertically stretched a bit at that line.
I tried all combos of EPP/ECP on the parport, with both EPP 1.7 and 1.9.
No change. May I ask a silly question here? How can a 1998 scanner that
was designed for a 1998 parallel port be too fast for a 2003 AthlonXP
1400's parallel port? Any other settings I should try? Sorry, but I'm
really clueless on those scanner things, as you might have noticed
Would you consider that backtracking thing sort of an acceptable (if not
normal) mode of operation? I mean, that noise is *really* loud... but if
you think it's by all means not related to any SW/driver issues, I'll
stop bugging you with this. After all, I am well aware that this is not
the Medion helpdesk ;-)