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Thread Higbee


Kevin Goddard
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  • 5 years later...

This has just come up for me and was wondering if anyone came up with anything? I have a formula that I can't remember what all of it means and I'd like to share for feed back. I am currently waiting for an install of MCX and writing by hand anyway. This formula calculates finish (vanish) point in "Z".

 

Z.1+Z(1)+MCC

 

DELTA RPM / PITCH / SERVO LAG CONSTANT = MCC

 

(NOTE: Z(1) "little one" is relative to tool tip.

I'm a little foggy on this one)

 

TIA

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Kevin,

I've done it, but it was like forever ago. The way I think I did it was to create a second threading op using a square face grooving or cutoff tool. The tool only ran the Z depth to blunt the first third of a revolution of thread which was in my case about .062. the key was to program the lead out with a .01 z component and a .1 X component this retracted the tool over where the actual thread is to begin. program it as threading so that you can easily cut the blunt in a number of passes so its clean.

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when I was a kid I used to cut them on a mill to prep the blanks for LoneStar gage. NOBODY I've ever worked for turned higbees for fear of tearing up the machine. By the end of the day I had the formula wired. TGIF!

when I have my notes in front of me I'll share for those interested and to save for search later in case I lose the thing.

 

cheers!

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I'm in the process of trying to mod a post to output threading correctly and in playing with it tonight i realized the Mastercam doesn't have a Z pull off component nor can you specify the pull off angle. I seem to remember programming that higbee in Gibbs actually. that would really have been along time ago.

 

suppose you could add it in manually. maybe it will be in X3?

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