Don't know how to perform face peck rigid tapping cycle in lathe.
When I use G84 in milling machine I can input Q-word which determines the depth of each step, but G84-command format in lathe doesn't have got Q-word.
If I use G84 several times one by one does it match with thread start point on each step?
This is an option.
If available on your machine, rigid tapping can be invoked by M29.
There is a parameter method also.(5200#0 = 1 on i-series controls).