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.
Software option
To use this function, you need the software option:
"Top Surface"
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
Dimensioning the COMPSURF function (DRAM)
= 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.
SD55220 $SCS_FUNC‐
TION_MASK_MILL_TOL_SET
Function screen form, high speed settings CY‐
CLE832
Bit 2 Mold making function can be selected in High-Speed Settings screen form
Technologies and cycles
21.9 High-speed machining
SINUMERIK Operate (IM9)
616 Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1