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 > > > >
