Siemens SINUMERIK 828D Manual page 30

2.3
General information on workpiece production
Main program: The main program includes the two key functions for milling, CYCLE832 and
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subprogram call (e.g. with EXTCALL) .
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CYCLE832 : CYCLE832 was specifically adapted for the program structure shown, where
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technology data and geometry data are separated. It brings together all the key commands and
activates control functions. The machining technology for milling is defined in CYCLE832. For the
roughing program "CAM_rough" using T1, the parameters in CYCLE832 were set towards
achieving a high velocity. For the finishing program "CAM_Finish", the parameters were set
towards achieving high surface quality and accuracy. CYCLE832 is deselected at the end of the
geometry blocks. More information is available on the individual parameters in Section
CYCLE832 (See "High Speed Settings - CYCLE832" on page 102.)
The call syntax changes if the Top Surface option is active.
EXTCALL : CAM programs are generally extremely large, which is why they are stored in an
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external memory. The EXTCALL command is used to call the subprograms from various
locations, including external memories. All programs should be located in the same directory. If
this is not the case, the paths must also be specified during the call.
If option EES is active, then the subprogram call is made without EXTCALL. (See "EES -
Execution from External Storage (NC Extend)" on page 35.)
ORISON (only for Advanced Surface COMPCAD) : The NC command ORISON is a vector
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smoothing function that has been specially developed for the 5-axis area. This function can be
used to smooth fluctuating orientation across several blocks. The aim is to achieve a smooth
characteristic for the orientation and a more harmonious movement of the axes. As of SW 4.5,
this command can be part of CYCLE832 (_ORI_ROUGH, _ORI_SEMIFIN, _ORI_FINISH). With
older software versions, it is recommended that ORISON is programmed after CYCLE832.
The OTOL command can be used to define the orientation tolerance for vector smoothing with
ORISON. The value is entered in degrees. The set value depends on the component.
Subprogram: The subprogram contains the geometry blocks. In our example, these initially take
the form of blocks for 3-axis milling, which are then followed by the blocks for 5-axis
simultaneous milling. These are designated A3, B3, and C3.
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