Siemens SINUMERIK 840D sl Programming Manual page 466

Tool offsets
7.4 Online tool offset (PUTFTOCF, FCTDEF, PUTFTOC, FTOCON, FTOCOF)
The online tool offset is written using various functions dependent on the timing of the
dressing process:
● Continuous write, non-modal (PUTFTOCF)
● Continuous write, modal: ID=1 DO FTOC (see "Online tool offset (FTOC) (Page 680)")
● Discrete write (PUTFTOC)
Note
Online tool offset can be applied only to grinding tools.
Syntax
Activate/deactivate online tool offset in the destination channel:
FTOCON
...
FTOCOF
Write online tool offset:
● Continuous, non-modal:
FCTDEF(<function>,<LLimit>,<ULimit>,<a0>,<a1>,<a2>,<a3>)
PUTFTOCF(<function>,<reference value>,<tool parameter>,<channel>,<spindle>)
...
● Discrete:
PUTFTOC(<offset value>,<tool parameter>,<channel>,<spindle>)
...
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With PUTFTOCF, dressing is carried out at the same time as machining.
The tool offset is changed continuously in the machining channel according to a
polynomial function of the first, second or third order, which must have been defined
previously with FCTDEF.
PUTFTOCF is always non-modal; in other words, it takes effect in the subsequent
traversing block.
With PUTFTOC, dressing is not carried out at the same time as machining from a parallel
channel. The offset value specified with PUTFTOC takes effect immediately in the
destination channel.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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