NEED HELP!!!

[vsmvj]

I have been trying to figure out how to program a 3/8 double lead thread for a few days now and can't get it just right. If anyone can help I would be gratefull.

[ProProcess]

Make your first thread.
Back up the Z start position 1/2 the pitch and thread again.

For further (or better help), please provide some more detail...
Print specification
Program example
Ect...

HTH, good luck

[vsmvj]

the print calls for a 3/8-16 double lead but the matching part seems to be more like a 3/8-12. when I do my second pass like the way you said adding half the pitch it looks like it has a doudle thread. Not sure whats going on. I seem to get more of a complete thread when I only add 1/4 of the pitch.

[ProProcess]

Originally Posted by vsmvj the print calls for a 3/8-16 double lead...

that means that your programed thread lead will be double or "8"

So your threads would be programmed with a feed rate of 1/8 or F.125.
You then back up the thread start point .125/2 or .0625 and do another thread with the F.125.
The result of this is a thread that has a pitch(peak to peak) of .0625 with 2 leads.
HTH. good luck!