Siemens SINUMERIK 808D User Manual page 190

_D P (depth)
The depth can be specified as an absolute value (_DP) to the reference plane.
_PA, _PO (starting point)
Use the parameters _PA and _PO to define the starting point of the area in the axes of the plane.
_L ENG, _WID (length)
Use the parameters _LENG and _WID to define the length and width of a rectangle in the plane. The position of the
rectangle, with reference to _PA and _PO, results from the sign.
_MIDA (max. infeed width)
Use this parameter to define the maximum infeed width when machining in a plane. Analogously to the known calculation
method for the infeed depth (equal distribution of the total depth with maximum possible value), the width is distributed
equally, maximally with the value programmed under _MIDA.
If this parameter is not programmed or has value 0, the cycle will internally use 80% of the milling tool diameter as the
maximum infeed width.
_FD P (retraction travel)
Use this parameter to define the dimension for the retraction travel in the plane. This parameter should reasonably always
have a value greater than zero.
_FD P1 (overrun travel)
Use this parameter to specify an overrun travel in the direction of the plane infeed (_MIDA). Thus, it is possible to
compensate the difference between the current cutter radius and the tool nose radius (e.g. cutter radius or cutting tips
arranged at an angle). The last milling cutter center point path therefore always results as _LENG (or _WID) + _FDP1 - tool
radius (from the compensation table).
_FALD (finishing allowance)
When roughing, a finishing allowance in the depth is taken into account which is programmed under this parameter.
The residual material remained as the finishing allowance must always be specified for finishing to ensure that the tool can
be retracted and then fed to the starting point of the next cut without collision.
If > 0, the parameter is ignored for finishing.
_VARI (machining type)
Use the parameter _VARI to define the machining type.
Possible values are:
● Units digit:
1=roughing to finishing allowance
2=finishing
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Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017