Method for determining a faulty tool in a production line and production line therefore

摘要

Procedure for at least two processing stations (4, 9) where each station has different numbers of similar tools (5-7; 10- 11) and a measurement sensor (12) is used for quality control of the workpieces. The sensor records the tool by which any reject workpieces are produced as well as their frequency. Comparison of the distribution with a stored frequency distribution indicates the faulty tool. An Independent claim is made for a production line with two or more processing stations and a test device for determining a faulty processing tool.