Siemens SINUMERIK 840D sl Programming Manual page 97

The following tool offset data (associated with the active tool) affect the tool radius when:
● $TC_DP6 (radius - geometry)
● $TC_DP15 (radius - wear)
● $TC_SCPx6 (offset for $TC_DP6)
● $TC_ECPx6 (offset for $TC_DP6)
The following are not taken into account:
● Online radius compensation
● Allowance on the programmed contour (OFFN)
Tool radius compensation (G41/G42)
Although tool radius compensation (G41/G42) and SVC both relate to the tool radius, they are
not functionally linked and are independent of one another.
Tapping without compensating chuck (G331, G332)
SVC programming is also possible in conjunction with G331 or G332.
Synchronized actions
SVC cannot be programmed from synchronized actions.
Reading the cutting speed and the spindle speed programming variant
The cutting speed of a spindle and the speed programming variant (spindle speed S or tool
cutting speed SVC) can be read using system variables:
● With preprocessing stop in the part program via system variables:
● Without preprocessing stop in the part program via system variables:
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
$AC_SVC[<n>]
$AC_S_TYPE[<n>]
$P_SVC[<n>]
$P_S_TYPE[<n>]
Effective cutting speed when the current main run block for
spindle with number <n> was preprocessed.
Effective spindle speed programming variant when the cur‐
rent main run block for spindle with number <n> was pre‐
processed.
Value: Meaning:
1 Spindle speed S in rpm
2 Tool cutting speed SVC in m/min or ft/min
Programmed cutting speed for spindle <n>
Programmed spindle speed programming variant for spindle
<n>
Value: Meaning:
1 Spindle speed S in rpm
2 Tool cutting speed SVC in m/min or ft/min
Fundamentals
2.6 Spindle motion
97