
B-63782EN/01 NC FUNCTIONS 6.REFERENCE POSITION
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6.3 AUTOMATIC REFERENCE POSITION RETURN (G28, G29)
- Return to reference position (G28)
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.
Format
G28 IP_ ;
IP : Command intermediate point
- Return from reference position (G29)
With the G29 command, the commanded axis is positioned to the point
commanded by G29, via the intermediate point commanded by G28.
Format
G29 IP_ ;
A
B
C
R
Reference position
Y
The programmer need not calculate
a concrete movement value between
the intermediate point and the
reference position.
Suppose tool change
was performed at R.
Example of use of G28 and G29