Over the last couple of years solar power generators have become more preferred due to our hard economical times. Thousands of solar energy systems are being installed domestically every day. Not only people lower their energy bills but solar panels are also safe for the environment. Read on if you have an interest in making your own home made solar panels that may significantly cut back your energy bills month after month.
* Use deionized water to slightly wet the sponge. Never use tap water. (The addition of fluorides to drinking water may be beneficial to public health, but causes a multitude of problems in electronics assemblies.)Normally a ready to go solar cell costs up to some thousands and I'm sure not everybody wants to make such an investment. This is the reason why more folks are deciding to build their own solar cells right in their own backyard.While most stencil manufacturers carefully inspect each piece and verify the quality of their process, mistakes still happen (FIGURE 1). The ultimate responsibility to make absolutely certain that a stencil is 100% correct before going into production lies with the assembler. But without a CMM to accurately measure the apertures, how can the assembler know for sure? This is where the solder paste inspection (SPI) systems change the game, giving assemblers the tools they need make the final determination of stencil acceptability.CHRYS SHEA is founder of Shea Engineering Services (sheaengineering.com); chrys@sheaengineering.com.Many assemblers have foisted responsibility for automated inspection and verification onto the stencil vendors, referring to them as "qualified" or "certified" suppliers. In essence, they have placed the fox in charge of the henhouse on a portion of their most critical SMT process. While this practice might look good on paper, it's rife with potential to backfire and ultimately costs the assembler more money than it saves.
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Author: Thomas Oliver
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