HEIDENHAIN TNC 620 (73498x-01) ISO programming - Manual (Page 353)

HEIDENHAIN TNC 620 353
13.3 Spindle speed S
, f
eed r
a
te
F and miscellaneous functions M
Changing the spindle speed and feed rate
With the override knobs you can vary the spindle speed S and feed
rate F from 0% to 150% of the set value.
The override knob for spindle speed is only functional on
machines with infinitely variable spindle drive.
The feed-rate limit depends on the machine. The machine
tool manual provides further information.