Siemens SINUMERIK 828D

Tool offsets
7.4 Online tool offset (PUTFTOCF, FCTDEF, PUTFTOC, FTOCON, FTOCOF)
Job planning
404 Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
7.4 Online tool offset (PUTFTOCF, FCTDEF, PUTFTOC, FTOCON,
FTOCOF)
Function
When the "Online tool offset" function is active, a tool length offset resulting from the
machining is applied immediately on grinding tools.
An application example is CD dressing, where the grinding wheel is dressed in parallel to
machining.
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The tool length offset can be changed from the machining channel or a parallel channel
(dresser channel).
The online tool offset is written using various functions dependent on the timing of the
dressing process:
● Continuous write, non-modal (
PUTFTOCF)
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.
● Continuous write, modal:
ID=1 DO FTOC (see "Online tool offset (FTOC) (Page 589)")
● Discrete write (
PUTFTOC)
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.
Note
Online tool offset can be applied only to grinding tools.