Ok, so I set my zero's (z end of part, x center of rotation)
Then I go to the threading wizard, and input my data
1" depth internal thread LH (Z start 0, Z end -1)
1.37X24tpi (X start -.65, X end -.685)
Cutting on the backside, spindle reversed, normal feed direction.
Problem is it wont let me enter a negative value in the X start box, if that makes sense?
Or am I going about this wrong?
Jayson