5
04.00 Special Motion Commands
5.2 S
line inter
olation
5
840D
NCU 571
840D
NCU 572
NCU 573
FM-NC
810D
840Di
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Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
5-155
Supplementary conditions
The following supplementary conditions apply only to
akima and cubic splines (A and C splines).
The transitional response (start and end) of these
spline curves can be set via two groups of
instructions consisting of three commands each.
Explanation of the commands
Start of spline curve:
BAUTO
No command input; start is determined by the position of the first point
BNAT
Zero curvature
BTAN
Tangential transition to preceding block (initial setting)
End of spline curve:
EAUTO
No command input; end is determined by the position of the last point
ENAT
Zero curvature
ETAN
Tangential transition to next block (initial setting)
BAUTO
EAUTO
BNAT
BTAN ETAN
ENAT
Transition
tangential
Zero curvature
No command input