SMD assembly

The board on which the SMD components are mounted must contain optical reference points (fiducial). It can be a round point with a diameter of 1 mm (or a square with a side of 1 mm) with an additionally exposed solder mask with a diameter of 2-3 mm (or a square with a side of 2-3 mm). Other designs are also allowed. The reference point should be within each individual tile (in exceptional cases it may be on the technological margin). For elements with a very fine raster, local fiducials of 2 pieces near the corners are helpful. Moreover, the optimization of the assembly speed requires that small tiles be delivered in panels – forms consisting of several dozen tiles. The optimal size of the panel should be close to the A4 format and within 300 mm x 210 mm (250 mm). On tiles – pieces whose dimensions are from 600 mm to 1500 mm (e.g. LED strips) it is very important that there are more than 4 reference points (preferably every 200 mm – they can be on the margins). The package should have 5mm technological margins around or at least on the long sides. It is best to consult the size of the package and the arrangement of the tiles with the EL-MONT company. If the production takes place from elements supplied by the customer, it is advisable to send the components in original packaging, for small orders it is permissible to deliver the components in ribbons several dozen centimeters). Integrated circuits and other components intended for SMD assembly should be delivered in factory packaging, such as rails, trays or tapes (tape and reel). Due to the fact that some components may have housing defects (often they are missing ends, chipped edges, unglued elements, curved legs – the automats reject some of the components), therefore, it is necessary to provide an appropriate number of components with a 5% margin for small housings – but not less than 20 pcs. For larger housings, the stock should be 3-5 pcs.
We always return unused components to the customer.