[sane-devel] Canonscan N 650U LIDE Scanner does not scan but makes terrible noise

[Andrea Vai]

Hi, as said in a previous message, I experience the same problem with my
N650U on Ubuntu 12.04 LTS.

I have done some testing, to understand if the problem depends on the
resolution, or on some other aspects.

The answer is: I don't know, because the noise sometimes appear on the
preview, sometimes on the scan, sometimes just appears connecting the
scanner (if it was grinding the last time it was disconnected). Other
times it does not grind, and scans smoothly at 50, 100, 300, 600 dpi.

Someone here on the list was wondering about the USB cable (shielded,
unshielded, I think) playing a role on this... I have only 1 cable at
the moment, so I cannot test other ones. But, the question is, would it
make sense that the same cable does not work with sane, but works
perfectly in windoze?

Thanks very much,
Andrea

Here is a sort of log:

Connect the scanner
Scan @ 50 dpi --> OK, no noise
close xsane, disconnect and reconnect the scanner, open xsane
Preview --> OK, no noise
Scan @ 50 dpi --> NOISE!
disconnect (--> xsane freezes), kill xsane, reconnect the scanner, open
xsane --> NOISE!
scan, cancel scan --> still noise, xsane freezes
kill xsane
disconnect, reconnect the scanner --> NOISE! (without opening xsane) (*)
open xsane --> still noise
scan --> ancora noise
cancel scan --> scan does not cancel, xsane freezes, still noise
kill xsane --> still noise
disconnect, reconnect --> no noise (! : what does make this different
from (*) above?)
open xsane --> NOISE!
preview --> OK, noise stops and the preview works

...so, it seems that the scan works, the preview itself works too, but
the preview makes any operation after it get grinding?

close xsane, disconnect/reconnect the scanner, open xsane

scan @ 50 dpi --> OK
scan @ 100 dpi --> OK
scan @ 300 dpi --> OK
scan @ 600 dpi --> OK

so, now scan works at different resolutions

preview --> NOISE!
so, now the preview itself does not work...

cancel preview --> does not cancel
disconnect the scanner --> xsane pops up message "scan canceled"
connect the scanner --> no noise

so, now, try again:

close xsane, open xsane --> NOISE!
preview --> still noise, xsane freezed
disconnect/reconnect the scanner --> no noise
kill xsane, open xsane --> still no noise
scan @ 50 dpi --> no noise, but when the lamp start going back to its
initial position --> NOISE! (NB every trial was made selecting a little
square (2x2 inches) for scanning, except this one, where it was scanning
the whole A4 page)
disconnect, reconnect --> no noise
scan @ 50 dpi --> xsane message "I/O Error"
close xsane, open xsane --> still no noise
scan @ 50 dpi --> OK, no noise
close xsane, open xsane
preview --> OK, no noise
close xsane, open xsane, scan @ 50 dpi --> NOISE!!!
disconnect/reconnect --> no noise
scan @ 50 dpi --> I/O Error
close xsane, open xsane --> NOISE!
(with noise still there) scan @ 50 dpi --> OK! (and noise stops)
close xsane, disconnect the scanner

another attempt:
connect scanner, open xsane --> no noise
scan @ 50 dpi --> NOISE!
cancel scan, disconnect --> scan canceled
connect --> no noise
scan @ 50 dpi --> I/O Error
close xsane, open xsane --> NOISE!
scan @ 50 dpi --> NOISE!
disconnect, cancel scan --> xsane freezes
kill xsane, connect, open xsane --> NOISE!
close xsane --> xsane freezes (still noise)
disconnect, kill xsane, connect, open xsane --> NOISE!
(with noise still there) scan @ 50 dpi --> OK! (and noise stops)...
what's the difference between the situation here and the preceding NOISE
after the scan?
close xsane, disconnect the scanner

Il giorno lun, 26/08/2013 alle 17.13 +0200, Winni ha scritto:
> Hi,
> again, I tried 20 minutes to scan with the Canonscan N 650U. In 
> comparison to the last time, all attempts resulted this time in this 
> awful noise.
> I booted WinXP 32-bit (twain drivers) and within 2 minutes two pages 
> were scanned perfectly.
> 
> How can I help you guys with this? Is there anything I can contribute to 
> make this scan device work for Linux OS without having skills of writing 
> code?
> 
> Thanx und regards,
> 
> Winni
> 
> 
> 
> -------- Original-Nachricht --------
> Betreff: Re: [sane-devel] Canonscan N 650U LIDE Scanner does not scan 
> but makes terrible noise
> Datum: Sun, 11 Aug 2013 20:25:06 +0200
> Von: Winni <"windose"@kabelmail.de>
> An: sane-devel at lists.alioth.debian.org
> 
> Hi,
> 
> I tried with different dpi resolutions. Most of the time  it starts with
> the horrible noise but sometimes it works. I'd say every 5th try works.
> Even calibrating under XSane results in that noise...
> 
> I searched for a plustek config file but could not find it.
> 
> By the way, there is a hint about "awfull noise" in the FAQ.gz at
> /usr/share/doc/libsane/plustek/
> >
> > SYMPTOM: Scanner makes awful noise
> > --------
> >
> > PROBLEM:
> > --------
> > This can have two major causes:
> > - You have an ASIC96001/3 based scanner, then the sensor hits the
> >   scanbed: !!! TURN OFF SCANNER POWER !!!
> >
> > - You have an ASIC98001 based scanner, then the motor control does
> >   not work correctly --> hit the cancel button
> >
> > SOLUTION:
> > ---------
> > For the first case (ASIC 96001/3), there's no solution available. This
> > happens, when the driver can't keep track of the stepper motor. The image
> > you get is normally unusable.
> > The second case is often reported when the printer driver lp.o is
> > already loaded. So remove lp.o before loading pt_drv.
> 
> 
> Regards,
> Winni
> 
> 
> 
>