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Camera crashes

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Offline waterwingz

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Re: Camera crashes
« Reply #20 on: 13 / March / 2014, 09:05:53 »
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Quote from: JvdP on 13 / March / 2014, 08:18:52
Also, I have tested these camera's and power supplies for many days on end without problems. So why do they have problems in that location?
My A1200 started failing after about six month of intermittent use.  It would power the camera and appear to work - but the camera would crash until I replace the capacitors.   I'm not saying that is your problem - you just asked for ideas about what might be wrong.
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline JvdP

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Re: Camera crashes
« Reply #21 on: 21 / March / 2014, 07:01:27 »
The camera which I've been running tests with has now successfully ran for one hole week, taking 27000+ shots without a problem. I have now changed the power supply on one of the locations and have to see if it helps. I have good hopes.

Very interesting if this is the culprit. Perhaps a good example of where cheap eBay stuff falls short.
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Offline waterwingz

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Re: Camera crashes
« Reply #22 on: 21 / March / 2014, 07:24:13 »
Quote from: JvdP on 21 / March / 2014, 07:01:27
Perhaps a good example of where cheap eBay stuff falls short.
Again. 
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline JvdP

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Re: Camera crashes
« Reply #23 on: 21 / March / 2014, 07:52:55 »
So, half an hour after I switched the power supply... Camera had crashed.  :blink:  :(  ???

I'm really clueless by now. The only thing I can now think of is that the 220V from the wall is unstable?
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Offline waterwingz

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Re: Camera crashes
« Reply #24 on: 21 / March / 2014, 08:00:19 »
Quote from: JvdP on 21 / March / 2014, 07:52:55
So, half an hour after I switched the power supply... Camera had crashed. 
I'm really clueless by now. The only thing I can now think of is that the 220V from the wall is unstable?
Will the camera stay running with CHDK loaded but no script running?
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline JvdP

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Re: Camera crashes
« Reply #25 on: 21 / March / 2014, 08:17:51 »
Well, I haven't tested this to be honest but I can with great certainty guess that it does. Why? Because usually, the camera has no problem to stay running during the "night" modes. This is the periods that the camera does not take photos.
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Offline waterwingz

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Re: Camera crashes
« Reply #26 on: 21 / March / 2014, 08:29:44 »
Quote from: JvdP on 21 / March / 2014, 08:17:51
Well, I haven't tested this to be honest but I can with great certainty guess that it does. Why? Because usually, the camera has no problem to stay running during the "night" modes. This is the periods that the camera does not take photos.
Makes sense - just trying to give you some different ideas and eliminate maybe script errors / CHDK bugs as a source.   How about running a simple script that just shoots every so many seconds continuously (set the jpg compression / image size for minimum file size to preserve card space - or have the script delete each image after shooting it)?
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline JvdP

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Re: Camera crashes
« Reply #27 on: 03 / April / 2014, 10:01:48 »
Quote from: waterwingz on 21 / March / 2014, 08:29:44
Makes sense - just trying to give you some different ideas and eliminate maybe script errors / CHDK bugs as a source.   How about running a simple script that just shoots every so many seconds continuously (set the jpg compression / image size for minimum file size to preserve card space - or have the script delete each image after shooting it)?
So, I have a small update.

I ran the camera today from a LiPo battery, in order to exclude the power supply. I have previously successfully ran these camera's with this CHDK version and the same equipment without problems.

After only half an hour, the camera crashed!

I never expected it to be such a complex problem but at this point I actually think it's some kind of interference. You see, if you have a look at the photo attached, you will see the camera is mounted on a steel beam. This beam is part of a construction on which the overhead cranes in the factory are operated. It is not totally unimaginable that the electricity (or perhaps some kind of vibrations?) to these cranes are having an effect on electronics.

It's a real pity because the angle I get from there is perfect for what I'm trying to capture (assembly process of a big machine).

Anybody any suggestions?
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Offline reyalp

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Re: Camera crashes
« Reply #28 on: 03 / April / 2014, 16:45:29 »
Quote from: JvdP on 03 / April / 2014, 10:01:48
Anybody any suggestions?
It's possible a CHDK bug could appear only under certain shooting conditions (lighting, focus, camera chosen exposure settings, chdk override/script exposure settings). Some pattern might emerge if you logged what the script is doing.

The ROMLOGs you've posted are all in a task that CHDK doesn't hook, but memory corruption or other problems caused by CHDK code could trigger that. Looking at what specific checks in the Canon firmware trigger the asserts might provide some clues.

EMI might not be out of the question if there is a strong enough source nearby. Maybe it needs an AFDB?
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Offline ahull

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Re: Camera crashes
« Reply #29 on: 04 / April / 2014, 05:04:36 »
I just thought I'd share my thoughts on trying to trouble shoot this.

If you can run the camera with a "do nothing but shoot" script, as suggested above and sill see the issue, it is probably an environmental or hardware issue.

If the camera and "do nothing" script is then run in a different location, away from the potential trouble sources, and it still crashes, it may be a hardware problem.

If you have access to a 2nd camera that runs CHDK try that in the original location. This would help eliminate the hardware as the source. You can pick up an Ixus 40,50,60, 70 or similar which will run CHDK for a few bucks on ebay to test this theory.
« Last Edit: 04 / April / 2014, 05:08:22 by ahull »
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