Programming: Tools; Entering Tool-Related Data - HEIDENHAIN TNC 426 B User Manual

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 the TOOL CALL block and in every
positioning block. See section 6.2, "Fundamentals of Path
Contours. "
Rapid traverse
If you wish to program rapid traverse, enter FMAX. To enter FMAX,
press the ENT key or the FMAX soft key as soon as 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:
To program a tool call, press the TOOL CALL key.
Ignore the dialog question for "Tool number ?" with
the NO ENT key.
Ignore the dialog question for "Working spindle axis X/
Y/Z ?" with the NO ENT key.
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.
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5 Programming: Tools

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