Commissioning; Memory Configuration; Tool Radius Compensation - Siemens SINUMERIK 840D sl Function Manual

M3: Coupled axes
5.2 Curve tables
5.2.4

Commissioning

5.2.4.1

Memory configuration

A defined storage space is available for the curve tables in the static and dynamic NC
memory, which is defined through the following machine data:
Static NC memory
MD18400 $MN_MM_NUM_CURVE_TABS
MD18402 $MN_MM_NUM_CURVE_SEGMENTS
MD18403 $MN_MM_NUM_CURVE_SEG_LIN
MD18404 $MN_MM_NUM_CURVE_POLYNOMS
Dynamic NC memory
MD18406 $MN_MM_NUM_CURVE_TABS_DRAM
MD18408 $MN_MM_NUM_CURVE_SEGNENTS_DRAM
MD18409 $MN_MM_NUM_CURVE_SEG_LIN_DRAM
MD18410 $MN_MM_NUM_CURVE_POLYNOMS_DRAM
Note
A curve table with linear segments can be stored efficiently in the memory only if:
MD18403 > 0 or MD18409 > 0
If no memory areas are created with this machine data, then the linear segments are stored
as polynomial segments.
5.2.4.2

Tool radius compensation

MD20900
Tool radius compensation can produce segments for which the following axis or leading axis
have no movement. A missing movement of the following axis does not normally represent
any problem. As against this, a missing movement of the leading axis requests a specification
as to how such discontinuities are to be handled, i.e., whether or not a curve table should be
generated in these cases. This specification is done in the machine data settings:
MD20900 $MC_CTAB_ENABLE_NO_LEADMOTION (curve tables with discontinuity of the
following axis)
216
Defines the number of curve tables that can be stored in the
static NC memory.
Defines the number of curve table segments that can be stored
in the static NC memory.
Defines the maximum number of linear segments in the static
NC memory.
Defines the number of curve table polynomes that can be
stored in the static NC memory.
Defines the number of curve tables that can be stored in the
dynamic NC memory.
Defines the number of curve table segments that can be stored
in the dynamic NC memory.
Defines the maximum number of linear segments in the
dynamic NC memory.
Defines the number of curve table polynomes that can be
stored in the dynamic NC memory.
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions