plustek: Thread: CanoScan N650U

I made the mistake of buying an N650U without checking for Linux
drivers.  Silly me.

Anyway, I've installed the latest and have the thing functioning
mechanically.  The image returned has the following characteristics:

all green pixels near zero intensity
all blue pixels near 255
red compressed into a range around 15-20% of scale

Enhancing the red shows that it is indeed seeing the piece of
paper on the glass, but it seems to be inverted: the black writing
is brighter (like by 1/255 on average) than the white paper.

Suggestions welcome, and I'd be very glad to get any alpha-test
changes anybody might have.  This is my first foray into the
system-level interface of a scanner.  At a guess, this is either
a calibration problem, a gamma table download problem, or a lamp
control problem.  Some guess, huh?

My platform is a dual P3 machine, running RedHat 7-something with
the 2.4.18-5 kernel in non-SMP mode since my USB bridge driver
doesn't work with the SMP kernel.

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On Wednesday, 3. July 2002 20:34, Stephen W. Nuchia wrote:
> I made the mistake of buying an N650U without checking for Linux
> drivers.  Silly me.
>
> Anyway, I've installed the latest and have the thing functioning
> mechanically.  The image returned has the following characteristics:
>
> all green pixels near zero intensity
> all blue pixels near 255
> red compressed into a range around 15-20% of scale
>
> Enhancing the red shows that it is indeed seeing the piece of
> paper on the glass, but it seems to be inverted: the black writing
> is brighter (like by 1/255 on average) than the white paper.
>
> Suggestions welcome, and I'd be very glad to get any alpha-test
> changes anybody might have.  This is my first foray into the
> system-level interface of a scanner.  At a guess, this is either
> a calibration problem, a gamma table download problem, or a lamp
> control problem.  Some guess, huh?
>
> My platform is a dual P3 machine, running RedHat 7-something with
> the 2.4.18-5 kernel in non-SMP mode since my USB bridge driver
> doesn't work with the SMP kernel.

Well the problem here is that the driver might set all hw setting correct
so that you're able to scan, but the data read functions don't work.
So I first have to correct them - how I don't know but I will try and figure
out how ;-) 

Gerhard

Further info on my N650U adventure:

The speed calculations are broken, too.  Watching it work with
the lid open I make the following observations:

At very high scanning density, the head moves most of the way down
the page.  At medium densitiies it moves about halfway, and at very
low densities it sits at the start point vibraring.

Changing the speed limit in the hardware description structure
(from 0.7 ips to 0.1 ips) seems to work for the lights-off motion
but does not limit the scanning speed.

Not knowing the encoding for the register that is marked as
acceleration ramp, I just played with it a little but it didn't
seem to improve anything.

Reading plustek-usbscan.c, it appears that the proper speed calculation
code is #if 0'd out.  What is in effect is labeled "poor man's
calculation" and does not incorporate the speed limit.

My conclusion: the stepper is being overdriven, and the acceleration
ramp parameter is probably not optimal.  The kickstart parameter may
be wrong too.  Hard to tell without putting the thing on a bench and
skinning it.

Based on your statement that the data read code isn't ready, I'm
going to requisition another scanner.  I'd still like to get this
one working at home, though.

Hi All,
I am not sure if this is the place to ask this or not.  I am running Red 
Hat 8.0 and am trying to get my CanoScan N 650U to work.  According to 
the Sane supported scanner list it is supported with the plustek driver. 
 Is the a current step by step guide?  I have tried everything I have 
found but all seem to be out of date and the Instructions in The Tar 
ball just don't seem to work for me.  Any help would be appreciated
Thanks Roger

Try this link http://www.mostang.com/sane/man/sane-plustek.5.html and "configuring usb.."

Quoting Roger Skildum ####@####.####

> Hi All,
> I am not sure if this is the place to ask this or not.  I am running Red
> Hat 8.0 and am trying to get my CanoScan N 650U to work.  According to
> the Sane supported scanner list it is supported with the plustek driver.
>  Is the a current step by step guide?  I have tried everything I have
> found but all seem to be out of date and the Instructions in The Tar
> ball just don't seem to work for me.  Any help would be appreciated
> Thanks Roger
>
>
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> To unsubscribe, e-mail: ####@####.####
> For additional commands, e-mail: ####@####.####
>
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Hi Roger,

can you be more specific please!
The few steps to patch SANE are described in
Plustek-USB.txt within the tar-ball. There are also some
words about the USB setup.
One common pitfall is an old SANE installation that might
interferes with the one that you have installed...

Gerhard

On Friday, 27. December 2002 17:16, Roger Skildum wrote:
> Hi All,
> I am not sure if this is the place to ask this or not.  I am running Red
> Hat 8.0 and am trying to get my CanoScan N 650U to work.  According to
> the Sane supported scanner list it is supported with the plustek driver.
>  Is the a current step by step guide?  I have tried everything I have
> found but all seem to be out of date and the Instructions in The Tar
> ball just don't seem to work for me.  Any help would be appreciated
> Thanks Roger
>

Hi Jaeger,

First thanks for responding.  To be more specific, I have tried a bunch 
of stuff but for my current configuration:  I have sane-backends and 
sane-backends-devel 1.0.8-5 via RH RPM's.  Am totally confused as to if 
I need to remove these and rebuild from a Tar ball or just need to 
install the driver.  By the way I have already tried removing them and 
rebuilding.  But could not even get started for some reason.  I have 
sane-backends-1.0.9.tar.gz and pustek-module-o_42_9.tar.gz downloaded. 
 Like the Plustek-USB.tx says, I unpacked the sane-backends to my 
working directory and then it says to goto sane-1.0.8/sane-backends. 
 There is no / sane-backends so assumed it meant /backend.  Went there 
and unpacked pustek-module-o_42_9.tar.gz.  Next it says to d a 
 ./configure and when I do I get a :  bash: ./configure: No such file or 
directory.  So that is where I am right now.  

I noticed that i have a /etc/sane.d/pulstek.conf file, is it possible 
that I just need to configure what I have?

Thanks again
Roger



Jaeger, Gerhard wrote:

>Hi Roger,
>
>can you be more specific please!
>The few steps to patch SANE are described in
>Plustek-USB.txt within the tar-ball. There are also some
>words about the USB setup.
>One common pitfall is an old SANE installation that might
>interferes with the one that you have installed...
>
>Gerhard
>
>On Friday, 27. December 2002 17:16, Roger Skildum wrote:
>  
>
>>Hi All,
>>I am not sure if this is the place to ask this or not.  I am running Red
>>Hat 8.0 and am trying to get my CanoScan N 650U to work.  According to
>>the Sane supported scanner list it is supported with the plustek driver.
>> Is the a current step by step guide?  I have tried everything I have
>>found but all seem to be out of date and the Instructions in The Tar
>>ball just don't seem to work for me.  Any help would be appreciated
>>Thanks Roger
>>
>>    
>>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: ####@####.####
>For additional commands, e-mail: ####@####.####
>
>
>  
>

Hi Roger,


On Saturday, 28. December 2002 20:12, Roger Skildum wrote:
> Hi Jaeger,

my firstname is Gerhard

>
> First thanks for responding.  To be more specific, I have tried a bunch
> of stuff but for my current configuration:  I have sane-backends and
> sane-backends-devel 1.0.8-5 via RH RPM's.  Am totally confused as to if
> I need to remove these and rebuild from a Tar ball or just need to
> install the driver.  By the way I have already tried removing them and
> rebuilding.  But could not even get started for some reason.  I have
> sane-backends-1.0.9.tar.gz and pustek-module-o_42_9.tar.gz downloaded.
>  Like the Plustek-USB.tx says, I unpacked the sane-backends to my
> working directory and then it says to goto sane-1.0.8/sane-backends.
>  There is no / sane-backends so assumed it meant /backend.  Went there
> and unpacked pustek-module-o_42_9.tar.gz.  Next it says to d a
>  ./configure and when I do I get a :  bash: ./configure: No such file or
> directory.  So that is where I am right now.

Okay when you unpack sane-backends-1.0.9.tar.gz to let's say
/tmp
the you should be able to find 
/tmp/sane-backends
or
/tmp/sane-1.0.9/sane-backends

Then to update the backends code you should use plustek-0.45TEST5.tgz
NO NEED to use plustek-module!!!!!
copy that plustek-0.45TEST5 tarball to
/tmp/sane-backends
there unpack the stuff
and there
./configure 
should work

When you say you have at least 
1.0.8 rpms installed, remove the prior to the ./configure step

That's it:
./configure
make all

and as root
make install

Hope this helps - don't forget to configure dll.conf and plustek.conf
Gerhard


>
> I noticed that i have a /etc/sane.d/pulstek.conf file, is it possible
> that I just need to configure what I have?
>
> Thanks again
> Roger
>

Hi !

I've some problems with my scanner / Linux-SW ?!?
The scanner is taken into account by my Suse-Linux 8.2 installation and
works
correctly unitil scanning depth will not raise 100dpi.
Every value higher than 100dpi leads the scanner to scan ( nearly to the
end of the
marked area ) and than stand still on this position.

Do you have further information about this problem or maybe
setting-problems (
made by an unexperienced user ) ?!?

Please reply ( if wanted ) to the following email-address :
####@####.####

Thanks
Lutz




Mit freundlichen Grüßen,

Lutz Ihnken
Abt./Dept. SKW1

i.A. Blohm+Voss GmbH
Combat System Integration
Hermann-Blohm-Strasse 3
20457 Hamburg
email: ####@####.####
Tel: +49 (0)40 3119-1957
Fax: +49 (0)40 3119-3332

Hello:

I've got the same scanner, and it works fine at least at 600dpi, perhaps you 
have a older backend than me? Try updating the Sane Backends package

Good luck!

El Mar 03 Jun 2003 07:54, ####@####.#### escribió:
> Hi !
>
> I've some problems with my scanner / Linux-SW ?!?
> The scanner is taken into account by my Suse-Linux 8.2 installation and
> works
> correctly unitil scanning depth will not raise 100dpi.
> Every value higher than 100dpi leads the scanner to scan ( nearly to the
> end of the
> marked area ) and than stand still on this position.
>
> Do you have further information about this problem or maybe
> setting-problems (
> made by an unexperienced user ) ?!?
>
> Please reply ( if wanted ) to the following email-address :
> ####@####.####
>
> Thanks
> Lutz
>
>
>
>
> Mit freundlichen Grüßen,
>
> Lutz Ihnken
> Abt./Dept. SKW1
>
> i.A. Blohm+Voss GmbH
> Combat System Integration
> Hermann-Blohm-Strasse 3
> 20457 Hamburg
> email: ####@####.####
> Tel: +49 (0)40 3119-1957
> Fax: +49 (0)40 3119-3332
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: ####@####.####
> For additional commands, e-mail: ####@####.####

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