HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 94)

78 5 Programming: Tools
5.1 Entering Tool-Related Data
Feed rate F
The feed rate is the speed (in millimeters per minute or inches per
minute) at which the tool center moves. The maximum feed rates
can be different for the individual axes and are set in machine
parameters.
Input
You can enter the feed rate in every positioning block or in a separa-
te block. Press the F key on the alphabetic keyboard.
Rapid traverse
If you wish to program rapid traverse, enter G00.
Duration of effect
A feed rate entered as a numerical value remains in effect until a
block with a different feed rate is reached. If the new feed rate is
G00 (rapid traverse), the last programmed feed rate is once again
valid after the next block with G01.
Changing during program run
You can adjust the feed rate during program run with the feed-rate
override knob.
Spindle speed S
The spindle speed S is entered in revolutions per minute (rpm) in
any block (e.g. during tool call).
Programmed change
In the part program, you can change the spindle speed with an S
block:
ú Press the S key on the alphabetic keyboard
ú Enter the new spindle speed
Changing during program run
You can adjust the spindle speed during program run with the
spindle-speed override knob.
5.1 Ent
er
ing T
ool-Relat
ed D
ata
X
Y
Z
S
S
F
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