Problem with pigtail lead on custom thread - CNCzone.com-The Largest Machinist Community on the net!

themez · #1 07-08-2008, 12:35 PM

The thread is a M5 x.8 . custom thread ...The thread lead starts at .080 diameter and then transitions to .150 minor diameter of the thread. The problem is the .08 transition to .150. I can send iges, we use Mastercam Any cnc lathe guys out there.

thanks,

Geof · #2 07-08-2008, 01:41 PM

Does your machine have the ability to do G32 threading?

This threading cycle allows the taper, and lead, to vary anywhere along the thread.

themez · #3 07-08-2008, 03:23 PM

heres a pdf of the thread. notice the start. disregard the cuts in the thread.
I am interested in the start of the thread. I do have a file wihout the cuts.

themez · #4 07-08-2008, 04:33 PM

Geof · #5 07-08-2008, 04:51 PM

I think that is simple if you have G32; I have never had any need to use it but I have seen pictures of threads that had a point similar to that and then a straight portion.

g-codeguy · #6 07-08-2008, 06:27 PM

Yup, use G32, pullout & return in a subprogram, modifiy the start position.

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