I have a vertical machining center running a mitsubishi meldas 520 am control
and I am trying to cut an internal 1"-11.5 NPT using a single point threading tool and am having no luck whatsoever trying to figure out what the book is telling me to do as far as a program to accomplish this. any help would be greatly appreciated! Thanks

gcrandall
I can't help with Mitsubishi Controller but can supply a file containing a full list of XYZ coords.
You would need to cut and paste the section to suit the radius of your tool.
If you are interested advise approx dia of cutter and wether you intend to cut from top or bottom.

thanks for the offer, but I figured it out.

This is a give and take message board, your learning experience may help someone else out.

Would you mind sharing the method you used to figure it out???

here is a copy of the program the cuts the threads. it does it in 3 passes:
T14M6
G55
G0X0Y0
G43H14Z3.
S4500M3
Z.5M8
G1Y.3808Z.3652F30.
G91
G2.1X0Y-.0515I0J-.3808Z-1.5652P18F30.
G90
G1Y0
G0Z3.
Z.5
G1Y.4008Z.3652
G91
G2.1X0Y-.0515I0J-.4008Z-1.5652P18F30.
G90
G1Y0
G0Z3.
Z.5
G1Y.4168Z.3652
G91
G2.1X0Y-.0515I0J-.4168Z-1.5652P18F30.
G90
G1Y0M9
G0Z3.
M19
G28Y0Z0
M30