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

Wed Aug 28 20:29:41 UTC 2013

Hi,

The only thing I can think of, that maybe different between 
Sane on Linux and Twain on Windoze is simply perhaps the speed or more 
specifically the timing between commands issued.  I do not know the 
scanner API in detail enough to be more specific.  If you send the steps
 to the motor rather than say go to position Y, then the timing of those
 steps is probably important.

FWIW, In windoze I can use 
SnoopyPro which logs USB messages to scanner with timestamps.  So it 
could be measured to some degree.

Most of time when I get noise 
from my LIDE30 is when the head moves back for some alignment to the 
sensor.  It seems to recover better or rather more often at higher dpi.

I
 tried to power the scanner from my bench supply with success but only 
very slight changes to my scan results.  I did measure the voltage at 
the scanner down a 1.8M cable I got off ebay which had 24awg conductors 
and it hovered around 4.6V.  I was concerned more about power since I 
noticed when connected into a cable powered hub it actually makes the 
noise nearly all the time and other times read errors are produced.  
Interestingly the specifications for the scanner want a 1.5M cable or 
less from canons website which means probably a very short cable since 
they seem to come in standard lengths.

I've thought about turning
 the scanner up side down a few times to lift the glass off the head and
 then not push to hard on the white lid when lowing on to paper for a 
scan.  The noise seems to be the motor stuck for some reason.  The clamp
 on the back is not engaged.

Regards,

dc
p.s. Sorry if I've double posted, reply all wasn't used!

> From: andrea.vai at unipv.it
> To: windose at kabelmail.de
> Date: Wed, 28 Aug 2013 14:52:02 +0200
> CC: sane-devel at lists.alioth.debian.org
> Subject: Re: [sane-devel] Canonscan N 650U LIDE Scanner does not scan but makes terrible noise
> 
> 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
> > 
> > 
> > 
> > 
> 
> 
> 
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