Siemens SINUMERIK 840D sl Programming Manual page 107

Program code
N60 GWPSOF
N65 GWPSOF(5)
Further information
Tool-specific parameters
In order to activate the function "Constant peripheral speed", the tool-specific grinding data
$TC_TPG1, $TC_TPG8 and $TC_TPG9 must be set accordingly. When the GWPS function
is active, even online offset values (= wear parameters; cf. "Grinding-specific tool monitoring
in the parts program TMON, TMOF" or PUTFTOC, PUTFTOCF) must be taken into account
when changing speed.
Select GWPS: GWPSON, programming GWPS
After selecting the GWPS with GWPSON, each subsequent S value for this spindle is
interpreted as a grinding wheel peripheral speed.
Selection of grinding wheel peripheral speed with GWPSON does not cause the automatic
activation of tool length compensation or tool monitoring.
The GWPS can be active for several spindles on a channel with different tool numbers.
If GWPS is to be selected for a new tool on a spindle where GWPS is already active, the
active GWPS must first be deselected with GWPSOF.
Deactivate GWPS: GWPSOF
When GWPS is deselected with GWPSOF, the last speed to be calculated remains valid as
the setpoint.
GWPS programming is reset at the end of the parts program or on RESET.
Query active GWPS: $P_GWPS[<spindle no.>]
This system variable can be used to query from the parts program whether the GWPS is
active for a specific spindle.
TRUE: GWPS is active.
FALSE: GWPS is inactive.
Fundamentals
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
6.4 Constant grinding wheel peripheral speed (GWPSON, GWPSOF)
Comment
; Deactivate GWPS for active tool.
; Deactivate GWPS for tool 5 (spindle 2).
Spindle motion
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