Constant Surface Speed w/RPM limit

[Joe Miranda]

In conversational mode I can program my lathe with constant surface speed and and RPM limit so that I can run, say, at 300SF with a max RPM of 1200. Is there a way to do that in regular G-code so that I can do simple stuff manually - like when I face off one end of a part to give myself a reference.
Thanks
Joe

[HuFlungDung]

G50 S1200

[Joe Miranda]

Thanks Hu! It worked.