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GSM camera lens

Views: 1759


GEB

#53175

GSM camera lens | 14 January, 2008

Hi,

The machine is a Universal GSM1 flexhead. Is it possible to just change the lens of a 2.6mil camera for a 1mil or 0.5mil lens. Or do I have to buy a complete camera assembly to do this?

Thanks, Grant

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#53176

GSM camera lens | 14 January, 2008

GEB - We have a 1.0 mil camera for GSM1 that we do not use. We would prefer to have a 2.6 mil on our machine. Are you interested in a trade?

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GEB

#53177

GSM camera lens | 14 January, 2008

Interesting... where are you based? I am in the UK. What types of components benefit from having a 2.6mil over a 1mil?

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#53179

GSM camera lens | 14 January, 2008

We are in North Western U.S. I like 2.6 better (for our mix of builds, anyway). 1.0 works great on PTF parts such as fine pitch QFP's but I don't like it for chips. It's too picky and we wind up forcing parts to the 4.0. We have another GSM dual beam with 4.0/2.6 combo and I like running it much better than our 4.0/1.0 combo. The 2.6 handles chips well and does a good job on the fine pitch IC's. Also, due to the larger field of vision, it takes less time to look at a large part over a 2.6 vs. 1.0.

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#53186

GSM camera lens | 14 January, 2008

SWAG is right on the money. I had a 0.5 mil per pixel camera and a 1 mil per pixel camera. As you increase magnification your focal range goes down. So your part height becomes much more critical. Parts out of focus will be rejected to the dump bucket more often. This is one reason the larger pixel cameras 2.6 and 4.0 cameras work better for chips. The smaller pixel cameras are too picky with chip caps and resistors. I did find that if you program chips as a J lead part with 2 legs, fewer chips are rejected into the dump bucket. Placement accuracy and repeatability will also improve.

I think you will have to swap out the entire camera box. However, I did know someone who replaced the camera inside the box. That was a swap for a broken camera 1 mil camera replaced with exact duplicate 1 mil camera.

Either way you will have to run machine calibration once the camera is swapped to a smaller pixel camera.

Chris

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GEB

#53187

GSM camera lens | 14 January, 2008

Thanks for the info. I use the machine with a 1mil for resistors and capacitors and the machine with the 2.6mil for ICs (both have a 4mil.) This is because the r's & c's seem to benefit from the 1mil, more than IC's. I was thinking of making the machines the same to make it easier to split parts between them. I think I'll have to try out how well the IC's work on a 1mil.

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#53188

GSM camera lens | 14 January, 2008

Your IC's should run great. I have changed out a handful of cameras inside the box (you know when your camera is burning out because the monitor will show black/gray horizontal lines). It's pretty easy. Aftermarket cameras are about $350 I believe. Always good to have one on hand if you are a GSM user. You must get it in focus then, as Chris states, calibration is necessary. However, back to your original question, I'm not sure what is involved with changing a 4.0 to 2.6, etc.

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