B1: Continuouspath Mode, Exact Stop, LookAhead
3.4 Dynamic adaptations
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
195
Activation/Deactivation
The function can be switched on or off independently for every dynamic response mode (see "Dynamic response
mode for path interpolation [Page 191]"):
MD20606 $MC_PREPDYN_SMOOTHING_ON[<n>] = <value>
Parameter assignment
Change in the contour sampling factor
The secant error which occurs during the interpolation of curved contours is dependent on the following factors:
•Curvature
• Interpolation cycle (display in the MD10071$MN_IPO_CYCLE_TIME)
• Velocity with which the relevant contour is traversed
The max. possible secant error is defined for each axis in the machine data:
MD33100 $MA_COMPRESS_POS_TOL (maximum tolerance with compression)
If the set interpolation cycle is not sufficiently small, the max. path velocity may be reduced in the case of
contours with greater curvature. This is necessary for ensuring that the surface of the workpiece is also produced
with an adequate degree of precision in this case.
By changing the contour sampling factor, the time interval with which a curved contour is sampled in the
interpolator (contour sampling time) can be set at variance with the interpolation cycle. A contour sampling time
which is shorter than the interpolation cycle can prevent a reduction in path velocity in the case of contours with
greater curvature.
Index <n> Dynamic response mode <value>
Free-form surface mode: Basic
functions
0 Standard dynamic response
settings (DYNNORM)
0off
1on
1 Positioning mode, tapping
(DYNPOS)
0off
1on
2 Roughing (DYNROUGH) 0 off
1on
3 Finishing (DYNSEMIFIN) 0 off
1on
4 Smooth-finishing (DYNFINISH) 0 off
1on
Note
Due to the additional storage requirements, the function should only be activated in the
relevant processing channels.
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