Reference Point Check; G27 - Mitsubishi Electric MELDAS C6 Programming Manual

14. Coordinates System Setting Functions

14.9 Reference point check; G27

Function and purpose
This command first positions the tool at the position assigned by the program and then, if that
positioning point is the first reference point, it outputs the reference point arrival signal to the
machine in the same way as with the G28 command. Therefore, when a machining program is
prepared so that the tool will depart from the first reference point and return to the first reference
point, it is possible to check whether the tool has returned to the reference point after the program
has been run.
Command format
G27 Xx
1
G27
Xx Yy
1 1
Pp
1
Detailed description
(1) If the P command has been omitted, the first reference point will be checked.
(2) The number of axes whose reference points can be checked simultaneously depends on the
number of axes which can be controlled simultaneously.
Note that the display shows one axis at a time from the final axis.
(3) An alarm will occur if the reference point is not reached after the command is completed.
Yy Zz Pp ;
1 1 1
: Check command
Zz : Return control axis
1
: Check number
P1 : 1st reference point check
P2 : 2nd reference point check
P3 : 3rd reference point check
P4 : 4th reference point check
14.9 Reference point check
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