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Reducing Soldering Cycle Times for Next-Gen Power Supplies
By Mark Birl, Area Sales Manager, Ersa GmbH S
iemens Industrial Manufacturing, Engin - eering and Applications (SIMEA) planned to introduce a new line of miniature power sup-
plies, but the complexity of the design required sol- dering cycle times that stretched the company’s machines beyond their limits. Partnering with Ersa, SIMEA recently installed its first VER- SAFLOW 4/55 selective soldering system along with the VERSAFLEX module. SIMEA, a division of Siemens AG Austria, is
a hub for development engineering and manufac- turing of PCBs, devices and components. One of the main product focuses at the SIMEA plant in Vienna, Austria, is industrial power supplies. At this facility and at another in Sibiu,
Romania, the company builds customized power supply systems and components, which are used around the world in automation, drive and building technologies, as well as in wind energy and medical engineering. SIMEA’s core competencies comprise development and product management, industrial- ization of power electronics, engineering of cus- tomer projects, prototyping, and test engineering.
Versatility with No Changeovers SIMEA’s new LOGO!Power power supply
units are designed to be used primarily in power
“The sub-circuit boards are set at an angle of 90° in the panels and are later soldered onto the main circuit boards. The second and even greater soldering challenge was the required cycle time of 40 seconds, which absolutely had to be observed...”
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challenge was the required cycle time of 40 sec- onds, which absolutely had to be observed,” says Harald Schmidt, soldering process technician at SIMEA. SIMEA approached soldering system
provider Ersa with test boards for the new prod- ucts. When the boards arrived, it was soon clear how complex and demanding the task was. While it was possible to work in parallel on the six main circuit boards with a y-variable double pot, the sub-circuit boards could not be reached. This would have required a second soldering
module with a single nozzle or a dip module, but this arrangement would not be able to meet the required cycle time of 40 seconds. Also, this setup would come with higher tooling costs and changeovers, which SIMEA wanted to avoid. Ersa tackled the challenge with its VER-
Ersa VERSAFLOW 4/55 and VERSAFLEX module at Siemens Austria.
during idle times. The power supplies are also built in a range of performance classes with differ- ent output voltages. The company was challenged to find solder-
ing equipment that could solder different kinds of units without changeovers, in the required cycle time. The LOGO!Power series is available in three versions, each differing in size and the proximity of their connections. Each panel consists of six main circuit boards and six sub-circuit boards and the panels are not in parallel. “The sub-circuit boards are set at an angle of
90° in the panels and are later soldered onto the main circuit boards. The second and even greater
SAFLOW 4/55 soldering system, fitted with the flexible VERSAFLEX selective soldering module, which eliminates the need for a second soldering machine. This system could meet the required cycle time and still guarantee high quality. After the test, the pins fit correctly and there were no solder bridges, even in fine-pitch areas. The results were recorded in an application report and sent back to SIMEA. “This application report and the observance
of the cycle times were crucial to our decision to choose Ersa,” says Schmidt. “Only with the use of the VERSAFLEX was it possible to achieve the required cycle time of 40 seconds per unit. The two tasks for the circuit board panel — pre-soldering of the sub-boards and soldering of the sub-boards to the motherboards — are simply not possible with the same speed and quality on other systems.”
Continued on page 72
May, 2018
#LEDITGROW PCIM Europe Hall 7 Booth 229
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