User talk:Xiezheyang

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May 2014
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 * to chip shooters, flexible placers are slow (6,000 to 40,000 per hour) with a high accuracy as low as 25 microns . As a result, flexible placers are being used to place
 * many as 36 vacuum nozzles around the perimeter of the rotating turret provide Z and theta alignment . Turret rotates multiple heads between pickup and placement locations. The PCB moves in X and Y