P And Q Mean Something Totally Different Here — Cnc Thread Cutting G76

In this tutorial, Marc walks through writing a complete G-code screw cutting program for an M20x1.5 fine metric thread on a CNC lathe — line by line, no shortcuts.
Part of an ongoing G-code programming series that has already covered header creation, roughing cycles, finishing strategies, and grooving techniques, this lesson focuses on the G76 two-line thread cutting cycle — what every parameter actually does and why each decision gets made the way it does.