Siemens sinumerik 808d Programming And Operating Manual page 159

VARI (undercut position)
The position of the undercut can be either specified directly or derived from the tool point
direction with the _VARI parameter.
VARI=0: According to tool point direction
The tool point direction is determined by the cycle automatically from the active tool
compensation. The cycle can operate with the tool point directions 1 ... 4.
If the cycle detects any of the tool point directions 5 ... 9, the alarm 61608 "Wrong tool point
direction programmed" and the cycle is aborted.
VARI=1...4: Definition of undercut position
For VARI<>0, the following applies:
● The actual cutting edge position is not checked, i.e., all positions can be used if
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
technologically suitable.
Cycles
2.5 Turning cycles
159