Return From Reference Point Return - YASKAWA yasnac i80m Instruction Manual

2.6.3 Return from Reference Point Return
(G29)
(1) This function causes the machine, after
being moved
to
the reference
point by automatic reference point
return (G28
or
G30) to
be returned
to
the original position by going back
on
the same
path as reference
point
return.
028 Y
.....
Z
.....
; A
-
B
-
C POINT (REFERENCE POINT!
R POINT
G29 Y
.....
Z
.....
:
C
—
R
—
D POINT
D POINT
:
l
REFERENCE ZERO POINTl
RAPID
TRAVERSE
.
POSITIONING
RETURN TO REFERENCE ZERO
i!
M
B(
INTERMEDIATE POSITIONING
POINT!
i
I
6
-
A
Fig. 2.6.2
(2) If G29 is
instructed, the distance between B
and
C need
not
necessarily
be considered in the
program.
Especially, if
an
incremental command
is used, G29 is useful in returning
to
the original coordinate
system
after once being
returned
to
the reference point.
(3)
With G29,
movement
C
—
B and B
—
D is executed
at
rapid
feed for
three axes (&up
to
five
axes)
simultaneously. However,
any
axis for
which coordinate command is omitted
does
not
move.
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73
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