Siemens SINUMERIK 808D ADVANCED Programming And Operating Manual page 179

The first machining depth is calculated from the total depth, finishing allowance, and the maximum possible depth infeed.
Sequence of motions when finishing (VARI=2):
Depending on the set parameters FAL and FALD, finishing is either carried out at the surface contour or at the base or both
together. The approach strategy corresponds to the motions in the plane as with roughing.
Explanation of the parameters
For an explanation of the parameters RTP, RFP, SDIS, DP, and DPR, refer to Section "Drilling, centering - CYCLE81
(Page 126)".
For an explanation of the parameters MID, FAL, FALD, FFP1, and FFD, refer to Section "Milling a rectangular pocket -
POCKET3 (Page 197)".
LENG, WID and CRAD (spigot length, spigot width and corner radius)
Use the parameters LENG, WID and CRAD to define the form of a slot in the plane.
The spigot is always dimensioned from the center. The length (LENG) always refers to the abscissa (with a plane angle of 0
degrees).
PA, PO (reference point)
Use the parameters PA and PO to define the reference point of the spigot along the abscissa and the ordinate.
This is the spigot center point.
STA (angle)
STA specifies the angle between the first axis of the plane (abscissa) and the longitudinal axis of the spigot.
CDIR (milling direction)
Use this parameter to specify the machining direction for the spigot.
Using the CDIR parameter, the milling direction can be programmed directly with "2 for G2" and "3 for G3", or alternatively
with "synchronous milling" or "conventional milling".
Down-cut and up-cut milling are determined internally in the cycle via the direction of rotation of the spindle activated prior to
calling the cycle.
Down-cut
M3 → G3
M4 → G2
VARI (machining type)
Use the parameter VARI to define the machining type.
Possible values are:
● 1=roughing
● 2=finishing
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA1, 01/2014
Up-cut
M3 → G2
M4 → G3
179