[CAD_CAM_EDM_DRO] Depth of piece

Hi

Can anyone tell me how a cnc machine references length in a collet chuck?
Example. If I have a number of 1/4in x 1in rods, and I want to round the one
end. The final, total length must be exact.
Manually, I would face both ends, measure it, chuck it, and reference to the
protruding end, then round it

In a collet chuck, the piece is pulled in with the chuck, so a back stop
can't be used?
So how would a cnc lathe using a collet chuck(and front loading) round a 100
pieces? What is the procedure?

I think that maybe the answer is that a CNC machine with collet chuck feeds
the work out, so it would;
- turn the end round
- part off

Regards
Roland


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