[sane-devel] canoscan 650 grinding

[Russell Davie]

Hi All

This is grinding before scans begin.
Its randomly happening, either before or after a preview, or a second scan.
I've checked if it is the book weight and it happens with nothing on the glass bed.

So to help: OS is Ubuntu - Dapper
The kernel:
 ~$ uname -a
Linux 2.6.15-27-386 #1 PREEMPT Fri Dec 8 17:51:56 UTC 2006 i686 GNU/Linux

sane: 
~$ apt-show-versions | grep sane
xsane-common/dapper uptodate 0.97-4ubuntu6
libsane/dapper uptodate 1.0.17-1ubuntu4
python2.4-imaging-sane/dapper uptodate 1.1.5-4ubuntu1
sane-utils/dapper uptodate 1.0.17-1ubuntu4
xsane/dapper uptodate 0.97-4ubuntu6
sane/dapper uptodate 1.0.14-1
python-imaging-sane/dapper uptodate 1.1.5-4ubuntu1

The scanner:
:~$ scanimage -L
device `plustek:libusb:003:029' is a Canon N650U/N656U USB flatbed
scanner
:~$ sane-find-scanner
found USB scanner (vendor=0x04a9 [Canon], product=0x2206 [CanoScan],
chip=LM9832/3) at libusb:003:029

this is the output before it grinds to a halt:
~$ export SANE_DEBUG_PLUSTEK=20 ; xsane

[plustek] >>> INCH=0, DOY=90
[plustek] usb_ScanBegin() done.
[plustek] usb_IsDataAvailableInDRAM()
[plustek] Data is available
[plustek] usbDev_ScanEnd(), start=1, park=0
[plustek] Color[0] (White): 424 pixels min=20204(7) max=32225(166) ave=27433
[plustek] 5%: low at 26061 (count=102), upper at 28804 (count=123)
[plustek] cano_AdjustWhiteShading() done
[plustek] MotorDPI=1200, MaxMotorSpeed=0.860, FFStepSize=242
[plustek] MOTOR: PWM=0x08, PWM_DUTY=0x1f 0x45=0x13 0x48=0x00, 0x49=0xf2
[plustek] MCLK_FFW = 6 --> 0x0a

This scanner works happily in *doz, so its not a machine problem.

hope you can help

TIA

Russell





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