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PCB design note
The user can use ground layer segmentation method to the circuit board layout wiring. Needing attention in design, make as far as possible circuit board with less than 1/2 inch spacing of jumpers or 0 Ω resistance will be split linked together. Note zoning and wiring, any signal lines can cross to gap or division between power gap. To test the circuit board of function and EMC performance, and then two through the 0 Ω resistance or jump line join together, to test the circuit board of function and the FMC performance. Comparison test results that will find that almost in all cases, the scheme to realize unified in function and EMC performance score GeDe more superior.

PCB performance parameters influence
PCB board plane degree of the industry standard reference IPC-2221 file definition: PCB bending, distorted the allowable value for PCB length L 0.75%, namely for (L x 0.75%) mm, but no more than 3.175 mm maximum. The PCB manufacturing tolerance will also affect the quality of mounted, mainly in pivot point (Fiducial) the outline of the outline of degrees and position deviation degree, as for PCB on the rest of the error, as through holes in the manufacturing tolerance will directly influence is the electrical properties after welding, but this does not belong to the influence of placement machine. Surface treatment for the influence of the mounted, primarily reflected in the pivot point (Fiducial) coverage, it can affect mainly is video system can truly accurate, fast benchmark recognition. Important principle is, resistance welding layer can't cover benchmark and the auxiliary distinguish area around it.

PCB transmit agencies role
Transmit institutions is the role of the PCB input to patch passed to the placement machine designated position, and will post the components from the PCB placement machine output and transmitted to the surface of the next patch process set each, when PCB into, the agency will have the precise of the X, y and Z axis positioning function, in order to complete the precise positioning function, placement machine set up specifically a benchmark the visual system used to complete the agency's visual position.

 

 
 
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