Siemens SINUMERIK 828D Function Manual page 164

B1: Continuous­path Mode, Exact Stop, LookAhead
3.3 Continuous-path mode
Contour tolerance and orientation tolerance
The contour tolerance and orientation tolerance are set in the channel-specific setting data:
SD42475 $SC_SMOOTH_CONTUR_TOL (maximum contour deviation)
SD42466 $SC_SMOOTH_ORI_TOL (maximum angular deviation of the tool orientation)
The settings data can be programmed in the NC program and can in this way be specified differently for each
block transition.
Note
The setting data SD42466 $SC_SMOOTH_ORI_TOL is effective only in active orientation
transformation.
Rounding behavior
Rounding behavior with G642 and G643 is configured via the machine data:
MD20480 $MC_SMOOTHING_MODE (rounding behavior with G64x)
The units positions (E) define the behavior for G643, the tens positions (Z) the behavior for G642:
Value E or Z Description
0 All Axes:
Rounding by maintaining the maximum permitted path deviation:
MD33100 $MA_COMPRESS_POS_TOL
1 Geometry axes:
Rounding by maintaining the contour tolerance:
SD42465 $SC_SMOOTH_CONTUR_TOL
Remaining axes:
Rounding by maintaining the maximum permitted path deviation:
MD33100 $MA_COMPRESS_POS_TOL
2 Geometry axes:
Rounding by maintaining the orientation tolerance:
SD42466 $SC_SMOOTH_ORI_TOL
Remaining axes:
Rounding by maintaining the maximum permitted path deviation:
MD33100 $MA_COMPRESS_POS_TOL
3 Geometry axes:
Rounding by maintaining the contour tolerance and the orientation tolerance:
SD42465 $SC_SMOOTH_CONTUR_TOL
SD42466 $SC_SMOOTH_ORI_TOL
Remaining axes:
Rounding by maintaining the maximum permitted path deviation:
MD33100 $MA_COMPRESS_POS_TOL
4 All Axes:
The rounding length programmed with ADIS or with ADISPOS is used (as in case of
G641).
Any axis-specific tolerance or contour and orientation tolerance specifications are
ignored.
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Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions