Miltronics Century 4 thread mill help

[Captain Midnigh]

Hi,
What would a simple thread mill program look like. I can't get anything to run.

The first thread looks fine, but on the second thread, the Z won't advance. I have tried many variations, but can not get a second thread.
Thanks

[extanker59]

Are you in incremental? Otherwise, it's sitting there because it's already where you told it to go.

BTW, it's working one pass so I'm confused, but I thought you would use R or I and K in G2.
Also, does L2 work in this situation? I've used L2 or more in canned cycles and sub calls but not in a feed move line. Interesting. I'll have to try it.

[Captain Midnigh]

I am in incremental. It makes one thread and then it makes a circle. I did use R and I. I don't know what K is. It won't cut threads in a in a sub either.
What would a simple thread mill program look like, to cut 6 continuos threads?

[extanker59]

Here's one for 1/2"-20 thread:


N33 (3/8-20 MULTI POINT THREAD MILL)
T33 M06
G00 G54 X0 Y0 S2353 M03
G43 Z.1 H33 M08 T01
G01 Z-.5063 F12.
X.0625 Z-.5 F6.
G03 Z-.45 I-.0625 J0
G03 Z-.4 I-.0625 J0
G00 X0 Y0
Z1. M09
M05
G53 Y0 Z0
M30
%

It's not doing what I like by arcing into the cut but it's a simple one that works (I hope). The K we discussed earlier would be the location of the center of the arc in Z, I is in X, and J in Y. R is used in place of them. From what I think I know, anyway. There are a lot more Knowledgable people here who can correct me if I'm wrong.
- just add more G03 lines for more threads or try your L6 after going incremental (I still haven't looked into that, seems like it would work though)