I guess it is best to ask are you running the pro version of Lcam that actually does tool radius comp?

(;-) TP

I still do not see where or how MachIII gets told what type of leadin is being used.

As Terry replied, you need the pro version of LC for advanced features of LC.

You are reponsible for defining where and the type of lead you want to use. LC will do it automaticaly, or try to , and that info
is in Tutorial #7. There are a number of options to select the type. LC will show the leadin / out in the graphics area and post code. The posted code contains the gcode which will be used by Mach.

RICH

Simple example of lead in  / out with code from LC.

RICH

but... whatever means are used to get leadins/outs into your code, they are just G1, G2, G3 moves or combinations thereof (as has been said).

That's why I had a little poke to post your code and then we could point them out to you.

Ian