Siemens SINUMERIK 840D sl Function Manual page 992

W4: Grinding-specific tool offset and monitoring functions - only 840D sl
18.3 Online tool offset
General
An online tool offset can be activated for every grinding tool in any channel.
The online tool offset is generally applied as a length compensation. Like geometry and wear
data, lengths are assigned to geometry axes on the basis of the current plane as a function
of the tool type.
The grinding spindle monitoring function remains active when an online tool offset is
selected.
Note
The offset always corrects the wear parameters of the selected length. If the length
compensation is identical for several cutting edges, then a chaining specification must be
used to ensure that the values for the 2nd cutting edge are automatically corrected as well.
If online offsets are active in the machining channel, then the wear values for the active tool
in this channel may not be changed from the machining program or via operator inputs.
Modifications to the radius wear (P15) are not taken into account until the tool is reselected.
The online offset is also applied to the constant grinding wheel peripheral speed (GWPS),
i.e. the spindle speed is corrected by the corresponding value.
Instructions
The following commands are provided for online tool offsets:
Command
FCTDEF
<polynomial no.>, <lower limit>, <upper limit>, <coefficient 0>,
<coefficient 1>, <coefficient 2>, <coefficient 3>)
PUTFTOCF
(<polynomial no.>, <reference value>, <length1_2_3>, <channel
no.>, <spindle no.>)
PUTFTOC
(<value>, <length1_2_3>, <channel no.>, <spindle no.>)
FTOCON
FTOCOF
Note
Changes to the correction values in the TOA memory do not take effect until T or D is
programmed again.
References:
/PGA/ Programming Manual Job Planning
992
Meaning
Parameterize function
(up to 3rd degree polynomial)
(Fine Tool Offset Definition)
Write online tool offset
continuously
(Put Fine Tool Offset Compensation)
Write online tool offset
discretely
(Put Fine Tool Offset Compensation)
Activation of online tool offset
(Fine Tool Offset Compensation ON)
Deactivation of online tool offset
(Fine Tool Offset Compensation OFF)
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions