[Elphel-support] elphel NC353L-12V Kit defect

[Viatcheslav Tretyakov]

Hello Andrey,

we tested the camera the way you described. Here are the answers.

What camera is it? Does it have 10359 board? 10369 board? What software is  it running ?

It's the 10353. I tried this with the original software that was on
the camera, with the software compiled from the sources and also with
modified sources (both FPGA and MC).


a) changing the image in front of the camera - you can check it by putting a mirror in front of the camera lens and  rotating the mirror

I do not get this?! What should this do? Doesn't have any influence if the camera and the cable are fixed.

b) shaking the camera itself (i.e. bad contact in the internal flex cable)  - you can turn the network cable around and tape it to the camera, sowhen you move the camera, nothing changes to the network connection

The distortion appears.

c) bad contact in the network cable- attach camera firmly to the table and move the network cable

This is what we think that causes the problem. When messing around
with the network cable in the jack at some positions the image
distorts and after moving it again, the image gets distorted in other
ways, also getting a normal image is possible again.

d)  it actually happens not because of the movement, but because of theelectrostatic discharge when you touch the camera

Shouldn't the case be electrostatic discharge proof? But without even
touching the camera (only moving the network cable) the image
distorts, I tried this with the camera attached on the tripod.


Regards,
Viatcheslav



On 04/16/2011 03:04 AM, Andrey Filippov wrote:
> Viatcheslav,
>
> there is another possible reason to break the image when you move the 
> camera
> d)  it actually happens not because of the movement, but because of 
> the electrostatic discharge when you touch the camera
>
> Can you please try these?
>
> Andrey
>
>
> On Fri, Apr 15, 2011 at 6:35 PM, Andrey Filippov 
> <support-list at support.elphel.com 
> <mailto:support-list at support.elphel.com>> wrote:
>
>     Viacheslav,
>
>     What camera is it? Does it have 10359 board? 10369 board? What
>     software is it running ?
>
>     As for "moving the camera" as the reason for breaking the image -
>     it can be one of the several reasons, you may narrow down the
>     problem by making some testing:
>
>     a) changing the image in front of the camera
>      -  you can check it by putting a mirror in front of the camera
>     lens and rotating the mirror
>
>     b) shaking the camera itself (i.e. bad contact in the internal
>     flex cable)
>      - you can turn the network cable around and tape it to the
>     camera, so when you move the camera, nothing changes to the
>     network connection
>
>     c) bad contact in the network cable
>      - attach camera firmly to the table and move the network cable
>
>
>
>
>     Andrey
>
>     On Fri, Apr 15, 2011 at 10:44 AM, Viatcheslav Tretyakov
>     <viatcheslav.tretyakov at iais.fraunhofer.de
>     <mailto:viatcheslav.tretyakov at iais.fraunhofer.de>> wrote:
>
>         Hello,
>
>         from the very beginning of the Kit's usage we've been facing
>         image distortions. The defect, which at first we thought is
>         software related, appears after several seconds of using the
>         camera. The defect is reproducible by just moving the camera.
>         I attached an image showing this image distortion effect. What
>         could the problem and how to solve it?
>
>         Regards,
>         Viatcheslav
>
>         -- 
>         Viatcheslav Tretyakov
>         Fraunhofer-Institut Intelligente Analyse- und
>         Informationssysteme IAIS
>         Schloss Birlinghoven, 53754 Sankt Augustin
>         Telefon 02241 14-2771 (-2046 Sekr.)
>         Fax 02241 14-2342
>         viatcheslav.tretyakov at iais.fraunhofer.de
>         <mailto:viatcheslav.tretyakov at iais.fraunhofer.de>
>         http://www.iais.fraunhofer.de/
>
>
>         _______________________________________________
>         Support-list mailing list
>         Support-list at support.elphel.com
>         <mailto:Support-list at support.elphel.com>
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>
>
>
>


-- 
Viatcheslav Tretyakov
Fraunhofer-Institut Intelligente Analyse- und Informationssysteme IAIS
Schloss Birlinghoven, 53754 Sankt Augustin
Telefon 02241 14-2771 (-2046 Sekr.)
Fax 02241 14-2342
viatcheslav.tretyakov at iais.fraunhofer.de
http://www.iais.fraunhofer.de/

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