
B–63523EN–1/03
6. INTERPOLATION FUNCTION
717
Number Message Description
217 DUPLICATE G251 (COM-
MANDS)
G51.2 (or G251) is further comman-
ded in the polygonal turning mode.
Modify the program.
218 NOT FOUND P/Q COM-
MAND IN G251
P or Q is not commanded in the
G51.2 (or the G251) block, or the
command value is out of the range.
Modify the program.
219 COMMAND G250/G251
INDEPENDENTLY
G51.2 (or G251) and G50.2 (or G250)
are not independent blocks.
220 ILLEGAL COMMAND IN
SYNCHR–MODE
In the synchronous operation, move-
ment is commanded by the NC pro-
gram or PMC axis control interface for
the synchronous axis.
221 ILLEGAL COMMAND IN
SYNCHR–MODE
Polygon machining synchronous op-
eration and Cs contouring control or
balance cutting are executed at a
time. Modify the program.
CAUTION
1 Before issuing a G51.2, rotate the spindle. If it is not rotating
when the G51.2 is issued, the program stops to wait for a
one–rotation signal from the position coder on the spindle.
This does not apply to a dry run.
2 A reset releases the polygonal turning mode.
3 Machine a workpiece at the same spindle speed until finish
machining for the workpiece.
Series
16i/18i/160i/180i/
160is/180is
OPERATOR’S MANUAL
(For Lathe) (B–63524EN)
II.19.1 POLYGONAL TURNING
Series
21i/210i/210is
OPERATOR’S MANUAL
(For Lathe) (B–63604EN)
II.19.1 POLYGONAL TURNING
Alarm and message
Caution
Reference item