Bill,
I guess it depends on the company. The company I work for, like I said before uses older machines. These machines are used for production runs of a particular product. We may run 300 parts then turn around and run another 150 parts a week later. While this is no aerospace company I still keep the models so that I can use the model to code a different machine.
99% of the models I draw are correct and changes can be made be it tooling or tool path changes. But depending on the materials be it bar stock or castings or the functioning of the machine, there are times that some edits need to be made. This is why when a program goes out to the floor, it has a program control sheet (which the operators can leave me a note like no edits were required or had to edit a drill depth because a casting was 0.1000" taller and the drill depth wasn't deep enough.
As programmer, I am responsible for the programs. I control the edits that maybe made (if needed they are kept, if not they are kept the same as the program before it went to the floor).
The company is an aerospace OEM and strictly adhere to ISO 9000 which states
I can see this. But the machines most aerospace use are top of the line and modern machines.that if you have a CAM system and a DNC system then the model (shape file) is the master and no code file should be kept.
I am not arguing just making a point that operators can edit programs (where I work) if need be.
Kevin Clark
Programmer
Abbott Workholding Inc.
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