I want to buy NI cam for my machine vision system

[Dennis_Knutson]

It's only large when you compare to the toy-like lens and sensors in the cheap cameras you've been looking at. How accurate do you want your system to be?

[AdnanZ]

Here is a good post by Mike Bailey explaining one of the reasons. Also, companies that design these products need to support the parts (and the product) for a good number of years. That drives the cost up. Commerical products maybe inexpensive but you will never get the quality, durability, stability and warranty that is associated with industrial machine vision components.

Edit: Also, note that over the years machine vision products have matured, functionality has increased, suppliers have become smarter and the cost and complexity of systems has come down. Ten years ago, machine vision systems cost $40,000 to $60,000, while today they run in the $5,000 to $20,000 range. They also offer vastly improved performance, with much richer data at much higher speeds.

[mangood]

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@AdnanZ wrote:

Here is a good post by Mike Bailey explaining one of the reasons. Also, companies that design these products need to support the parts (and the product) for a good number of years. That drives the cost up. Commerical products maybe inexpensive but you will never get the quality, durability, stability and warranty that is associated with industrial machine vision components.

Edit: Also, note that over the years machine vision products have matured, functionality has increased, suppliers have become smarter and the cost and complexity of systems has come down. Ten years ago, machine vision systems cost $40,000 to $60,000, while today they run in the $5,000 to $20,000 range. They also offer vastly improved performance, with much richer data at much higher speeds.

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 i agree with you

thank for footnote

[mangood]

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@Dennis_Knutson wrote:
It's only large when you compare to the toy-like lens and sensors in the cheap cameras you've been looking at. How accurate do you want your system to be?

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you can see my problem is to classify head of screw
so what do u mean by accurate!!

[Dennis_Knutson]

Accurate in terms of correctly identifying. Use your cheap hardware if it works x % of the time and that's all you need. You were the one who said the web cam did not work. Because it did have the resolution, speed, lighting?

[Dennis_Knutson]

And your problem is very poorly defined. You have a generic picture of some screw types. No information at all on size or the environment (in a bin, on a conveyor, moving, static).

[mangood]

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@Dennis_Knutson wrote:
Accurate in terms of correctly identifying. Use your cheap hardware if it works x % of the time and that's all you need. You were the one who said the web cam did not work. Because it did have the resolution, speed, lighting?

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helow dear
The web cam not work :: I mean because the appear video or captured images not  stable the pixels look like moving do you know what caues this !!!
so I try to buy industrial cam from ni but its price very large so now I back again to buy another  webcam usb2 low cost about 100$  ,the member give me some good information in choosing  the web cam
but after search in web I find that the companies that make the webcam does not give any information about focal length,pixel size and signal to noise ratio in their product

for me problem you can see that the height of cam about 0.5 meters and the head of the   screw is stationary  (not moving)

the Diameter of screw head about  1 cm 

regards

[Dennis_Knutson]

Instead of doing your research (and filling in the rest of your requirements and specifications), do what was recommended and ask an expert. For me, I went to Edmund and Graftek (sp?). They will save you time and money.

Personally, I think your budget is off by at least an order of magnitude.

[mangood]

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@Dennis_Knutson wrote:
Instead of doing your research (and filling in the rest of your requirements and specifications), do what was recommended and ask an expert. For me, I went to Edmund and Graftek (sp?). They will save you time and money.

Personally, I think your budget is off by at least an order of magnitude.

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whos Edmund and Graftek!!!
forget the money

as you look like expert
what the imporatnt camera specification that importnatis in this case

[Dennis_Knutson]

I am not an expert. Graftek is a vision specialist company. Edmund is a large optics company. I relied on both to get the right hardware for the right price. I could have spent days and days doing research on the countless variety of optics but I made a couple of phone calls. There are still parameters you need to provide and perhaps someone can guess and make some recommendations. At this point, I won't.