Siemens SINUMERIK 840D

9
08.97 Path Traversing Behavior
9.3 Curve tables
,
CTABDEF
,
CTABEND
,
CTAB
,
CTABINV
9
840D
NCU 571
840D
NCU 572
NCU 573
810D 840Di

Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
9-313
Additional notes
The following are not permissible:
•
Preprocess stop
•
Tool radius compensation
•
Jumps in the leading axis movement (e.g. on
changing transformations)
•
Traverse statement for the following axis only
•
Reversal of the leading axis, i.e. position of the
leading axis must always be unique
•
CTABDEF and CTABEND statement on various
program levels.
All modal statements that are made within the curve
table definition are invalid when the table definition is
completed. The part program in which the table
definition is made is therefore located in front of and
after the table definition in the same state.
R parameter assignments are reset.
Example:
...
R10=5 R11=20
...
CTABDEF
G1 X=10 Y=20 F1000
R10=R11+5 ;R10=25
X=R10
CTABEND
... ;R10=5
Repeated use of curve tables
The function relation between the leading axis and
the following axis calculated through the curve table
is retained under the table number beyond the end
of the part program and during power-off.
The curve table created can be applied to any axis
combinations of leading and following axes whatever
axes were used to create the curve table.