HEIDENHAIN TNC 640 User Manual page 535

Special Functions | Global Program Settings (option 44)
Feed rate factor
Refer to your machine manual.
Your machine tool builder can also disable individual
settings possibilities within the Global Program Settings
function.
With the Feed rate factor option, the Global Program Settings
function allows you to modify the current machining feed rate. The
input corresponds to a percentage. Input range: 1 % to 1000 %
The current machining feed rate is a combination of the
programmed feed rate and the current position of the
feed rate potentiometer.
The Feed rate factor option in the Global Program
Settings has no influence on a programmed rapid
traverse (FMAX).
All feed rates can jointly be limited using the feed rate
limit (F MAX soft key. The Feed rate factor in the Global
Program Settings function has no influence on the
limited feed rate!
Further information:
page 733
Control display
The general status display shows the following icons and
information:
Ovr
Result of the feed rate potentiometer setting
No icon and no value are displayed for the feed
rate limit (F MAX soft key)!
Feed rate factor active (default icon of the Global
Program Settings function)
F
Result of all modifications = current feed rate
The control displays the value of the feed rate factor on the GS
tab of the additional status display.
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
"Feed rate limit F MAX",
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