SMT007 Magazine

SMT-Nov2014

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24 SMT Magazine • November 2014 abstract In the fast developing electronic industry, the demands for production equipment are changing rapidly. The industry is looking for both stable production processes and automat- ed procedures in order to have full control of quality and costs. This also affects the rework processes that are still commonly dependent on the knowledge and skills of operators who are handling repair and touch-up of electronic as- semblies. For a rework system to carry out automated user-independent rework, the placement pro- cess must operate automatically. A new place- ment technology uses two cameras to identify the target area for component installation and component pin structure. Image processing software calculates the correct placement posi- tion for the component by using the image in- formation. A motorized four-axis system is able to move the component to the target position without interaction of any operator. The pro- cedure is based on an automatic pin detection algorithm along with a matching algorithm to find the correct position of the pin pattern in the target image. Several alignment procedures as well as camera corrections are implemented in order to reach the high demands of place- ment accuracy and repeatability. The new placement technology relieves the user from exertive optical alignment and time- consuming manual adjustment as well as guar- anteeing a high repeatability in the positioning results. While the system is placing and install- ing the component, the user can focus on pre- parative activities. Besides automatic placement, the new re- work technology allows automatic component flux and paste dipping as well as handling of paste printed components. Additionally solder- feaTure by Joerg nolte erSa GMbh New Placement Technology for Rework Systems

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