Yaskawa YASNAC PC NC Programming Manual - Manual (Page 65)

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YASNAC PCNC Programming Manual Chapter 3: Movement Control Commands
(3) Supplements to the Machine coordinate System Commands
• The G53 command can be executed when all of the following conditions are satisfied.
If it is executed before all of them are satisfied, alarm “0322” occurs.
•
Not in the mirror image mode
•
Not in a canned cycle mode or tool radius offset C mode
•
The immediately preceding 01-group G code is any of G00, G01, and G60.
•
G53 and G00 are not specified in the same block.
• If G53 is executed with machine lock ON, move command is processed to update the
present position display until the value to which the move command must be pro-
cessed if machine lock were OFF, and then the processing is completed. Accordingly,
if machine lock ON/OFF setting is switched over while the commands in the G53
block are being executed, positioning cannot be made correctly. However, if all com-
mands in the G53 block are executed in the machine lock OFF state, positioning can
be completed correctly even if machine lock status is switched over beforehand.
• G53 should be executed in the G90 mode. If it is executed in the G91 mode, the com-
mands in the G53 block are executed assuming the G90 mode.
• If G53 is executed in the tool length offset or tool position offset mode, the commands
in the G53 block are executed in a manner to cancel the offset mode. Therefore, the
tool length offset or tool position offset mode should be canceled before specifying the
G53 command.