Siemens SINUMERIK 840D Programming Manual page 176

3
Milling Cycles
3.11 Face milling – CYCLE71
Description of parameters
See Subsection 2.1.2. (Drilling, Centering –
CYCLE81) for a description of parameters _RTP,
_RFP, _SDIS
See Section 3.9 (POCKET3) for a description of
parameters _STA, _MID, _FFP1.
See Section 3.2 for cycle setting data _ZSD[1].
_DP (depth)
The depth can be defined as an absolute value
(_DP) in relation to the reference plane.
_PA, _PO (starting point)
With parameters _PA and _PO you define the starting
point of the surface in the abscissa and ordinate.
_LENG, _WID (length)
With parameters _LENG and _WID you determine
the length and width of the rectangle in the plane.
The sign determines the position of the rectangle
relative to _PA and _PO.
_MIDA (max. infeed width)
With this parameter, you define the maximum infeed
width for solid machining in the plane. In the same
way as the known calculation of the infeed depth
(equal distribution of the overall depth using the
largest possible value), the width is evenly divided,
using the value programmed in _MIDA as a
maximum value.
If this parameter is not programmed, or if its value is
0, the cycle uses 80 percent of the mill diameter as
maximum infeed width.
_FDP (retraction travel)
This parameter defines the dimension for retraction
travel in the plane. This parameter must be
programmed with a value greater than zero.
3-176
_LENG
Y
_MIDA
_PO,
_PA
Infeed point
Roughing with _MIDA larger than mill radius
(Type of machining 41)
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3
12.97
11.02
_FDP1
X
© Siemens AG, 2002. All rights reserved