Hello.

I've found out on a Haas VF mill, I can program the feed rate on a 1/2-13 tap by going F[1/13*#4119]. But when I try this on a Fanuc OM control, I get a #201 alarm (no feed rate for rigid tap). So I tried:

S400 M84
#100=#4119
G84 Z-.95 R.05 F[1/13*#4119]

And I got the same alarm (201). Variable #100 was set to 0.

So I tried this:

#100=400
S#100 M84
G84 Z-.95 R.05 F[1/13*#100]

And it worked fine.

As I understand #4119 is the last command spindle speed. But it apears that I can't read it. I'm trying to come up with a easier way to program the feedrate by using the pitch of the tap so if I change the RPM, I wouldn't have to worry about updating the feed rate.

Is my systax wrong?

Thanks for the help.