Siemens SINUMERIK 840DE sl Commissioning Manual page 630

Technologies and cycles
21.9 High-speed machining
21.9.3 Top Surface: CYCLE832 extension
Function
Besides Advanced Surface, the High Speed Settings (CYCLE832) function also offers the
extension Top Surface. You can use Top Surface to improve the quality of free-form surfaces.
If set actively, the continuous-path control is optimized within contour tolerances. The
CYCLE832 call also contains the smoothing parameter.
Figure 21-16 Roughing, semi-finishing, or finishing with active smoothing
Tolerance / orientation tolerance
The tolerance value for Top Surface is transferred to the NC as a contour tolerance with
command CTOL and as a multiple axis transformation with command OTOL.
Setting up parameters
Set the following machine and setting data to set up the Top Surface extension:
MD28071 $MC_MM_NUM_SURF_LEVELS
SD55220 $SCS_FUNC‐
TION_MASK_MILL_TOL_SET
Bit 2
616
Software option
To use this function, you need the software option:
"Top Surface"
= 6 Defines the size of the internal data structures of the COMPSURF function. With larger
values, the attainable surface quality increases, but so do the computing time and memory
requirements.
Mold making function can be selected in High-Speed Settings screen form
Dimensioning the COMPSURF function (DRAM)
Function screen form, high speed settings CY‐
CLE832
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1
SINUMERIK Operate (IM9)