For wider PCB, PCB due commonly used are usually thin , between 0.8 ~ 2.4 mm, when the PCB into the SMT, PCB transmission rails on both sides of the grip, while supporting the platform will rise to live and continue to support the board rising to the height of the patch . In this process , due to the action of external forces, PCB easily cause deformation, with the possible deformation of the incoming PCB , will seriously affect the quality of the patch . Flat on the PCB support becomes very important that the major chip equipment manufacturers have this configuration for users to choose . Thin PCB applications are more prone to " spring bed " effect. As the leader sheet affixed to the concave depression , and with the patch and recovering the pressure deformation , so that repeated , causing the element to move the PCB, and the patch defects occur . So, on the need to arrange special support platform support means to ensure that PCB in the process of formation of a stable placement . Such means may be vacuum sucked PCB may also be used with a special rubber thimble energy absorption to eliminate vibration during the placement and ensure smooth PCB .
Such devices are very customer oriented , depending on the application needs to design appropriate support structures to ensure the effective level support , and to the platform in the rise and fall during the stable and smooth , and controllable .
