Solder skip from seletive pallet

Pb-Free or lead free solder will be faced the solder skip if the pallet open too small

Solder tension during remove the connector

Solder tension is coming out from the center of solder fountain nozzle will direcly force the copper pad that always found the copper dissolution problem in lead free solder.This problem will be reduced by put the screen in the center of nozzle .It will reduce force and reduce the copper dissolution.