Pick & Place cycle

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I'm a new SMT member, I understand not clearly about Pick & ... - Nov 05, 2016 by anhsang38

Which process do you have a question about? Is there somethi... - Nov 07, 2016 by llllGodly

Thanks for Your informations ... - Nov 07, 2016 by anhsang38

Some machines use air blowing to not only place the part but... - Nov 08, 2016 by sarason

anhsang38

#76558

Pick & Place cycle | 5 November, 2016

I'm a new SMT member, I understand not clearly about Pick & Place cycle of mounter machine. I just know it as the desciption below. Pls, help me to understand clearly.

Turn on vacuum to pick component--> checking component--> turn off vacuum and blow air to place component on the board.

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llllGodly

#76569

Pick & Place cycle | 7 November, 2016

Which process do you have a question about? Is there something more specific you're looking for?

Basically you're close on the cycle. And this is a very basic cycle, there are many types of nozzles,machines,methods that will do this slightly differently.

-Nozzle drops onto the part.

-Vacuum on to pick up the part.

-Verifies the part (mechanical or optical) -Mechanically: Jaws tap the part to center part on the nozzle. -Optically: The part is moved over a camera that checks for the dimensions.

-Part is placed on PCB, vacuum off. repeat.

Typically there's no need for an air discharge to place a part. Either the part is "heavy" enough that when the nozzle moves back up the part stays down, or for parts like 0201's the paste has a "tacky" properties to hold the part to the PCB.

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anhsang38

#76573

Pick & Place cycle | 7 November, 2016

Thanks for Your informations

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sarason

#76578

Pick & Place cycle | 8 November, 2016

Some machines use air blowing to not only place the part but to also help guarantee that when the nozzle is sucking it doesn't end up with a net accumulation of solder paste inside the nozzle. Juki and Yamaha spring to mind.

sarason

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