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New Placement Technology for Rework Systems
November 19, 2014 |Estimated reading time: 1 minute
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 automated procedures 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 assemblies.
For a rework system to carry out automated user-independent rework, the placement process must operate automatically. A new placement technology uses two cameras to identify the target area for component installation and component pin structure. Image processing software calculates the correct placement position for the component by using the image information. A motorized four-axis system is able to move the component to the target position without interaction of any operator. The procedure 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 to reach the high demands of placement accuracy and repeatability.
The new placement technology relieves the user from exertive optical alignment and time-consuming manual adjustment as well as guaranteeing a high repeatability in the positioning results. While the system is placing and installing the component, the user can focus on preparative activities.
In addition to automatic placement, the new rework technology allows automatic component flux and paste dipping as well as handling of paste printed components. Additionally soldering and desoldering processes are operated automatically.
Introduction
Rework had a shadowy existence over the past 10 or 15 years. It was hard to accept that zero-failure production was, and currently is, a myth. But those in electronic production know that production failures have been present and will continue to exist. They have tried to get faulty assemblies to work, while others did not know how rework was accomplished and how the quality of the rework operators could ever be controlled.Read the full article here.Editor's Note: This article originally appeared in the November 2014 issue of SMT Magazine.