OD Threading Lathe

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17 Apr 2011 21:30 #9017 by andypugh
Replied by andypugh on topic Re:OD Threading Lathe
It's complicated.
I have not done many threads, and like you I always seem to have to keep at it for about 3x the expected depth.

I think one issue is the tip radius of the cutting tool. How does the standard define the depth and how are you touching off. I think that the disparity might be there. (or part of it)

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17 Apr 2011 21:34 #9018 by BigJohnT
Replied by BigJohnT on topic Re:OD Threading Lathe
I see that I had a preamble in that one that sets it to diameter mode. Could that be your problem?

I would remove that first line completely and use the ngcgui std.ngc file to set up your machine so it will be consistent. In fact I'm going to change mine before I forget. If one of the subroutines needs a special setting be sure to set it back at the end of the subroutine.

John

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18 Apr 2011 14:52 #9043 by BigJohnT
Replied by BigJohnT on topic Re:OD Threading Lathe
I just looked at the manual and diameter mode has no affect on K.

John

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