PETpla.net Insider 01+02 / 2015

INSPECTION SYSTEM 23 PET planet insider Vol. 16 No. 01+02/15 www.petpla.net Feasibility analysis In certain cases, a feasibility analysis is an appropriate way to find out how the customer’s requirements are met best. “Sometimes a producer asks us for inspecting objects with a standard system we haven’t done before yet”, explains Klaus Schönhoff. “In this case we have to gather more detailed information concerning the feasibility to make reliable statements, just as the customer expects from us quite rightly. In this case, it is neces- sary to create a feasibility analysis in advance. Sometimes the analysis takes up a lot of resources as there are complex experimental assemblies to be made. However as soon as the order for the system follows, the costs can be accounted.” A finished analysis makes decisions easier and gives both parties a good basis for the cooperation. It might even save costs for the system itself when it turns out that other or less components like cameras or inspection modules are needed than originally planned. Experience has shown that the best results are obtained when the internal customer’s departments like the head of quality management, production and purchasing department define the spec- ifications together. When the system is in use in the field, the user should not exceed the limits of the system agreed upon in the specification due to new requirements. Otherwise, this might bring negative consequences like malfunctions and breakdowns. To avoid this, one should contact the expert team of Intravis who will help to readjust the system to the new requirements. Well maintained specification book As a central document, a specifi- cation book is normally compiled by Intravis. It exactly defines the range of performance of the inspection system. Among other things, it con- tains a precise listing of all samples and of all defect classifications. Fur- thermore, it provides an overview of the system structure and gives many technical details about measure- ments and the technical execution. Finally, it comprises the requirements to the production processes such as object gap and speed as well as the temperature and humidity of the entire environment. Finding a vision inspection system – proposal for the customer  Bring a reference object as well as several bad parts with various defects. This will reduce costs and time for a consultancy service  Find out together if other defect types have to be specified to have a com- plete coverage  It is advisable not to exceed the limits agreed upon in the specification when the system is in use in the field as errors might occur or the reliability of the system might suffer  Take care of a well maintained specification book that has been agreed upon by all relevant internal departments to avoid ill-defined criteria. The best is to come to an internal agreement within the customer’s company in advance. In this regard, a well maintained specification book is a good guideline. “The specification books are more precise and detailed than a few years ago”, says Klaus Schönhoff. “Not only technical drawings are added but there are more drawings overall. They replace text passages as they define more clearer the object areas to be inspected.” In general: The more pre- cise and comprehensive an inspection is, the more extensive and costly it will be – the best reason to focus on the relevant inspection criteria and to narrow the defect definitions. www.intravis.com To define precise inspection require- ments, complex experimental assem- blies are necessary In the application laboratory, the self-developed software IntraVision helps to find bad parts in every object area