U100-L Thread help

Hi all, I am new to the forum but not to CNC in general. We have an older LH35-N with an OSP U100-L control that does not have the IGF set up. I frequently have to make internal and external pipe threads. Can someone give me an example of how the program should look for like a 6" NPT external? I have been having a hard time getting it to work. I have been using the g71 but it does not operate like I expect it to.

Thanks in advance....

Nathan

Here is the code I have tried. I am on the back turret of an LH 35N so I am threading from Z-2.0 to Z.250 which should be 2 pitches in front of where I want to start adn 2 pitches past the end of the stub..

G71 X6.396 Z.25 I-.089 B60 D.010 H.100 F.125 M23M32M75

My problem is probably part code but I think more that I don't really understand the start and finish depths that I should be using.

Any help is really appreciated, I really need to run these parts tomorrow!!

OSP U100L

Thanks,

Nathan

Noone on this one? 6 inch pipe thread with a g71?

We have tried:

G71 X6.403 Z.25 A-1.78 B60 D.010 U.002 H.100 F.125 M22 M32 M75

We are on a rear turret so we have to thread ffrom the back out.

You need to post your start point in X and Z, then we will know what to tell you, sorry for the delay.

Robert

Here's an extract from an Okuma manual.
You didn't mention that you had looked through one.