PCBA

Why does PCB have a craft edge?

Jul 07, 2021

In the process of SMT patch processing, the PCB is completed by track transmission. The PCB board needs to be fixed during track transmission. Conventional equipment uses the splint method and there should be no components and parts in the clamped range and the crawler range. Lead interference, otherwise it will affect the normal transmission of the PCB board due to the inability to clamp and fix, or reduce the work efficiency due to the collision of the patch parts and the equipment too close. Therefore, it is necessary to add some blank areas on both or four sides of the PCB as process edges, reserve a safe distance, and expand the space from the patch parts in the PCB to the edge of the board to assist PCB production and processing. The reserved width of the craft side is generally recommended to be 5.0mm.

  However, not all PCB boards need to add process edges. If the space between the patch parts in the PCB board and the board edge is large enough and not within the crawler range, there is no need to add additional process edges.

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