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Mydata centering jaws causing ESD and part damage

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#73028

Mydata centering jaws causing ESD and part damage | 7 November, 2014

Has anybody had issues with the Mydata centering jaws causing esd and part damage. I understand we can lower the force on the components but ESD is my main concern. In the past I heard of companies testing the centering jaws because of this concern. Anybody have the same problem?

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#73029

Mydata centering jaws causing ESD and part damage | 7 November, 2014

We have placed billions of components with our Mydata's. No issues with ESD.

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#73030

Mydata centering jaws causing ESD and part damage | 7 November, 2014

We have run Mydata machines for 10+ years with no ESD damage from the machine itself that we know of. Can you tell us how you have verified it is the machine causing the ESD damage?

It seems to me the ESD damage would be far more likely coming from the way the components are handled while loading the machine and/or how the boards are handled after they are removed from the machine.

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#73033

Mydata centering jaws causing ESD and part damage | 7 November, 2014

This issue is coming from a customer. The customer demands that we do not mechanically center or test passive components, because of issues they had in the past. There has been a studies that it takes about 8-10 newtons to damage chip. Most of our packages are set 2.5N.I don't understand how the customer figured that the centering jaws would create enough ESD damage a component.

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#73034

Mydata centering jaws causing ESD and part damage | 7 November, 2014

That is a lot of Mydata lines to place billions of parts.

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#73035

Mydata centering jaws causing ESD and part damage | 8 November, 2014

Hello

We a Mydata and put all kinda of components with the midas unit, but never had problems with ESD, and some of them are very delicate parts, perhaps like our colleague said perhaps you should look at the trays or feeders that you are using, perhaps the chio came already with a problem prior to being place with the midas head.

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#73040

Mydata centering jaws causing ESD and part damage | 10 November, 2014

It's called running every day 3 shifts for 22 years.

Anyway....My precise numbers aren't handy but lets just say a lot of parts were placed in that time.

I would be pretty confident in saying that the centering jaws do not cause ESD damage on Mydata machines.

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#73043

Mydata centering jaws causing ESD and part damage | 10 November, 2014

The centering jaws are made out of copper, I believe...and conductive. I'd suggest that the conductivity of the copper makes it a fairly poor source of ESD damage in a component.

I have observed physical damage to components from the centering jaws; however, it's neither regularly occurring, or expectable. If your centering force is set properly, it should never occur. If it does happen, there's likely to be a problem with the component long before there's a problem with the machine.

If you have a customer telling you that they've experienced ESD failures in the past due to centering jaws on passive components, they're smoking something. Sounds more like someone did not complete a thorough failure analysis, and blamed the wrong thing in the process.

At any rate, you can likely check with MyData for more info...I'd be surprised if they haven't considered this, considering they've been doing mechanical centering on parts for well over sixteen years.

Cheers, ..rob

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