Capability of new CNC machines

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bobdoering

Stop X-bar/R Madness!!
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#32
By the way, the issues of overcontrol - as seen by AIAG - are now in the AIAG SPC 2nd Ed. page 171 - as a special cause. Also, while in ther area, check out page 175 - Repeating patterns.
 

sinned

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#33
I don't have experience on operating CNC machine but I do incline to bobdoering's lines of thought in the topic.
More than often in my real world experience, the focus has been shifted from understanding the process to the no-brain application of Cpk. It is always easier to push all this work to the supplier !
In my company, we also have active manual intervention on grinding process to compensate for tool wear. But the process behavior was studied before setting up the method of intervention.
 
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