Lathe pauses at N21

If you are using the Axis interface you can select machine -> halmeter and watch the value of spindle.0.at-speed (or motion.spindle-at-speed in older versions)

(this is worth trying anyway, it is useful to know how to watch the HAL signals)

If it is showing "true" then that isn't the problem. If it is showing false then the simple (but not the best) answer is to add "setp spindle.0.at-speed 1" in the HAL file. But then the machine will never wait for the spindle.

If you are not using Axis then there will generally be a different way to load halmeter. If you can't find it then "halcmd loadusr halmeter" from the command line will always work.

Showing "True" good idea though. Also great to remind me to play with the meter more.

If I throw a G94 into line N21 then up the F to .5 I get movement, BUT I don't get a G0 retract move on Z 3 lines later.

Do you have a spindle encoder?
What does halmeter show spindle.0.speed-in doing?

no encoder, but we have a winner. I added in a "setp spindle.0.speed-in 100" into the HAL and have movement.

Still having no movement on the retract Z move though.

Success! With all the testing I went back to F360 and redid the post processing. All good now and roughed out a design I made.

Thanks everyone!