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Old 07-30-2007, 11:27 PM
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can you describe the transition from full z depth to no wheel contact?
If your asking about when the flute is finished, & the wheel exits the flute, I program a small amount of over travel (approx. 1.0mm) I would still be in G91, I also do the same before the wheel touches the drill (pre travel, approx. 1.0mm (G91)), so that the wheel isn't slamming into the drill, when it rapids up to the drill (G90).



What is the relataion/ratio? (2ipm along x-axis to 1imp along the y-axis)
I might have mislead you, when I said "I use all 5 axis to grind the flute", actually for a basic 2-flute drill the "Y,Z, & C-axis" are only used to Rapid (G90) up to the drill & then stay fixed in that position, the actual infeed (G91) is in only "X & A-axis"

I work in metric so the 2ipm converts to "50.80" that sounds correct for the "X & A-axis" feeds (G91).



Is there any y-axis movement during the operation?
No, after the "Y-axis" Rapids to the drill it stays fixed in that position, during the entire grinding process.


Does the c-axis change during one part.
No, just like the "Y, Z-axis" the "C-axis" Rapids to the drill and stays fixed in that position, during the entire grinding process.





NOTE:
Just like any other program everything depends on how the machine is setup, how many axis, etc...


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