Programming Basics
1.2 Basics of feed function
04.07
1-17
© Siemens AG 2007 All rights reserved
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition
1.2 Basics of feed function
This section describes the feed function that specifies feedrate (distance per
minute, distance per revolution) of a cutting tool.
1.2.1 Rapid traverse
Rapid traverse is used for positioning (G00) and manual rapid traverse (RAPID)
operation. In the rapid traverse mode, each axis moves at the rapid traverse rate
set for the individual axes; the rapid traverse rate is determined by the machine
tool builder and set for the individual axes by using parameters. Since the axes
move independently of each other, the axes reach the target point at different time.
Therefore, the resultant tool paths are not a straight line generally.
Note
Setting units of rapid traverse rate 1 mm/min
0.1 inch/min
1 deg./min
Since the most appropriate value is set conforming to the machine capability, refer
to the manuals published by the machine tool builder for the rapid traverse rate of
your machine.
1.2.2 Cutting feed (F co mmand)
Note
The unit ”mm/min” is normally used for feedrate for cutting tool in this manual, as
long as there is especially no explanation.
The feedrate at which a cutting tool should be moved in the linear interpolation
(G01) mode or circular interpolation (G02, G03) mode is designated using address
character F.
With a 6-digit numeral specified following address character F, feedrate of a cutting
tool can be designated in units of “mm/min”.
Refer to the manuals published by the machine tool builder for programmable
range of the F code.
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