Quote:
Originally Posted by alvin
What could be wrong with the input steel?
I would assume that the data feeding into the computer is correct, their multi-million-dollar CNC equipments are great, and the operators (if any) are professionals.
But why is the product quality low? and what's human being's factor in this process?
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The person who coded the program may have used excessive clearances (different from tolerances)...The SS may have been of low quality or just too "soft" a grade...Stainless is subject to "galling" no matter what grade; it requires good lubrication...(I use LSA on all my SS pistols; others have their own preferred lubes)...
Operator/coder can specify spindle speed too fast (or too slow); feed rate may be too high (or too low); depth of cut may be...yup, you guessed it...too much or too little...
It's not all that much different from manually machining the piece...You just approach it differently...and you try out a new program on inexpensive workpieces; not expensive forgings (or in the case of the SS Lugers, investment castings, IIRC)...
It's not something you can learn in a day...a good machinist learns his trade over a lifetime...and is still learning...
I wish I was a good machinist...I'm running out of time...
