Threadmilling on Old Fadal -MC9.2

[jspangler]

Hi

Trying (!!) to cut 3" - 8 NPT threads, 1" deep, 2 pockets, using MC9.2 and and OOOOOOOOOLD fadal with CNC 88 control, using format 1.

 

I know it's been done, because I can see the parts here in the shop, but I cannot find an MC or NC file ANYWHERE. I programmed it myself, but it output so many lines of code (over 1,000 for 2 holes) that I couldn't load it into the control. What am I doing wrong, and better yet, how do I do it RIGHT???

 

 

Again, PVC, 3" - 8 NPT using a boring bar type single edge cutter (measuring 2.072). Both pockets are 1" deep. No rigid tapping, or any of that fancy stuff on this machine....

 

Thanks,

John

[Guest]

John,

 

If your machine will do G03 X.000Y.0000Z.0000

 

moves then open up the threadmill cycle and uncheck the linearize helix's box, that should shorten up your code considerably

[Bryan Johnson]

If you are programming as a tapered thread, you will not get arc moves.

If it is a multi-point insert, with the taper on it, you may be able to get by with 1 turn, and no taper in your program.

[jspangler]

Hi

I just ordered a multi point insterted 8-NPT threadmill, figuring that HAD to work.

We'll see.

Thanks

John