
5. REFERENCE POSITION
B–63172EN/01
NC FUNCTION
40
With the G28 command, the commanded axis is positioned to the
reference position via the commanded point. After positioning, the
reference position return end lamp lights. If G28 was commanded when
reference position return is not performed after power on, reference
position return is done in the same sequence as the manual reference
position return.
G28 _ ;
: Command intermediate point
IP
IP
With the G29 command, the commanded axis is positioned to the point
commanded by G29, via the intermediate point commanded by G28.
G29 _ ;IP IP
: Specify a return destination position.
A
B
C
R
Y
X
(Reference position)
Intermediate
point
Reference position return A³B³R
Automatic return from
the reference position R³B³C
(Start point for reference
position return)
(Move destination from
the reference position)
Example of use of G28 and G29
5.3
AUTOMATIC
REFERENCE
POSITION RETURN
(G28, G29)
D Return to reference
position (G28)
D Return from reference
position (G29)