Dena Technologies has a fully automated SMT production line. SMEMA connections (Surface Mount Equipment Manufacturers Association) control the passage of boards from one machine to another. The major pieces of equipment are separated by various conveyor units.
The line begins at the automatic magazine board loader. Bare boards are loaded into magazines. Up to 50 panels can fit inside each magazine. When running the second side of double-sided PCB’s, if any of the components are especially tall, the loader can be configured to skip empty slots in the magazine to make room for the tall components. Up to two magazines can placed on the loader at once. Full magazines are placed on the lower shelf. The magazine is conveyed into the lift section next to the solder paste printer. As each board is taken, the magazine is lifted in steps. When the magazine is empty, it is conveyed backwards onto the top shelf and the next full magazine is conveyed into the lift. The loader can hold three magazines at a time, but only two of them can be filled.
After the printer is a lift gate which allows the operator to easily walk around the back of the pick and place machine to access the rear feeders. Lifting the gate will automatically prevent the printer from sending boards out.
After the pick and place machine is an inspection station. Our pick and place machine does an absolutely exceptional job, but it is still necessary to perform first article inspections and occasional spot inspections. Sometimes this station is used to place unusual components which cannot be loaded onto the pick and place machine. The station has a switch to either let boards pass through or stop them until the inspector presses the pass button to release boards to the reflow oven.
After the reflow oven is a board unloader, which is basically the mirror image of the loader and uses the same magazines.