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Page 58


www.us-tech.com


March, 2021


Improving the Energy Efficiency of Soldering Systems


By Dr. -Ing. Andreas Reinhardt, Director of Research and Development, and Heike Schlessmann, Marketing, SEHO Systems GmbH E


lectronics manufacturers are under more pressure than ever to differentiate themselves from the competition in a global market. It is a chal- lenge to balance product quality against price pressures and man- ufacturing process sustainability. SEHO Systems GmbH, a leading manufacturer of complete soldering solutions for automated production lines, has a unique perspective on the industry, since it works closely with customers around the world.


SEHO sees energy efficien- cy, flexibility, greater automated process control, and reduced sus- ceptibility to wear, as key areas to improve in electronics manu- facturing.


Reducing Energy Consumption


Approximately 70 percent of the total electrical energy con- sumption of a wave soldering system is used to preheat assem- blies. To improve overall energy efficiency, several elements must


be considered and more than one may need to be optimized. When warming up for pro- duction, a system requires much more time to prepare if it starts from “off” rather than “standby.” From standby, the system may only need a few minutes to be


system is at 100 percent load. Due to increasing product variety and lower batch volumes, advanced technology is required to achieve consistent, good solder joints. Without improving the technology, several small mach- ines would have to take the place


well as “variable load” modes, by using a new type of pulsar heater in the preheat zone. These heaters can switch very quickly between preset parameters from one product to another without shutting down the line.


SEHO’s LongLife mini-wave solder nozzle has a lifetime more than three times that of conventional nozzles.


ready. If the machine is in “no load/ready” mode, product can enter the machine, since there is nothing in the system. However, in “variable load” mode, fewer products enter the machine than it is able to process. Maximum throughput is reached when the


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of one large one. This then raises the costs of floorspace, mainte- nance and energy consumption.


Factors of Energy Efficiency


The overall energy consump- tion of a wave soldering system can be reduced for “no load” as


There are three specific areas SEHO has identified that, if improved, can greatly reduce energy consumption. First, when the machine is empty and switches over to standby mode, the heaters can be set to a mini- mum, since switching from low to work setting takes only sec- onds. The baseline power to keep the environment stable in the machine is approximately 3.5 kW. This minimal energy supply is enough to keep the tempera- ture stable in the tunnel, avoid- ing any influence on the temper- ature profile of the products. If the load is less than 100 percent, every heater without a product running over it can be switched to standby. Fewer loads then directly results in lower


Continued on next page


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IPTE America LLC


6245 Shiloh Road East, Suite B Alpharetta GA 30005 USA T: +1 (0) 678 807 0067 x 101 F: +1 (0) 678 807 0072 E: sales.usa@ipte.com


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