Siemens SINUMERIK User Manual page 180

The form of the groove can be modified by entering radii/chamfers at the margin or at the base. It is imperative to enter the
radii with positive sign, and the chamfers with negative sign.
FAL1 and FAL2 (finishing allowance)
It is possible to program separate finishing allowances for groove base and flanks. During roughing, stock removal is carried
out up to these finishing allowances. The same tool is then used to machine a contour-parallel cut along the final contour.
IDEP (infeed depth)
You can program an infeed depth to divide the paraxial grooving into several depth infeeds. After each infeed, the tool is
retracted by 1 mm for chip breaking.
The IDEP parameter must be programmed in all cases.
DTB (dwell time)
The dwell time at the groove base should be selected such that at least one spindle revolution is carried out. It is
programmed in seconds.
VARI (machining type)
The machining type of the groove is defined with the units digit of the VARI parameter. It can assume the values indicated in
the illustration.
The tens digit of parameter VARI determines how the chamfers are taken into account.
VARI 1...8: Chamfers are calculated as CHF
VARI 11...18: Chamfers are calculated as CHR
Programming and Operating Manual (Turning)
180
01/2017