HEIDENHAIN TNC 426 (280 476) - Manual (Page 125)

98 5 Programming: Tools
5.1 Ent
e
ri
ng T
ool-Relat
ed D
a
ta
5.1 Entering Tool-Related Data
Feed rate F
The feed rate F 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 the TOOL CALL block and in every
positioning block (see “Creating the program blocks with the path
function keys” on page 131).
Rapid traverse
If you wish to program rapid traverse, enter F MAX. To enter F MAX,
press the ENT key or the F MAX soft key when the dialog question
FEED RATE F = ?
appears on the TNC screen.
Duration of effect
A feed rate entered as a numerical value remains in effect until a block
with a different feed rate is reached. F MAX is only effective in the block
in which it is programmed. After the block with F MAX is executed, the
feed rate will return to the last feed rate entered as a numerical value.
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 a
TOOL CALL
block.
Programmed change
In the part program, you can change the spindle speed in a TOOL
CALL block by entering the spindle speed only:
7 7 7 7 To program a tool call, press the TOOL CALL key.
7 7 7 7 Ignore the dialog question for Tool number ? with the
NO ENT key.
7 7 7 7 Ignore the dialog question for Working spindle axis
X/Y/Z ? with the NO ENT key.
7 7 7 7 Enter the new spindle speed for the dialog question
Spindle speed S= ?, and confirm with END.
Changing during program run
You can adjust the spindle speed during program run with the spindle-
speed override knob.
X
Y
Z
S
S
F