Yaskawa YASNAC PC NC Programming Manual - Manual (Page 49)

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YASNAC PCNC Programming Manual Chapter 2: Commands Calling Axis Movements
(2) Supplements to the Return Command from the Reference Point Return
(a) Automatic reference point return
If G29 is specified without the execution of G28 or G30 after turning ON the power, alarm
“0240” occurs.
(b) Tool radius offset and canned cycle
If G29 is specified in the tool radius offset mode (G41, G42) or in a canned cycle (G73,
G74, G76, G77, G81 to G89), alarm “0170” or “0182” occurs.
(c) Tool position offset
It is necessary to cancel the tool position offset function before specifying G28, G30, or
G29. If these G codes are executed in the offset mode, the intermediate positioning point
B’ is also offset, causing the tool to move to point B. Note that the tool position offset and
tool length offset functions are not canceled by G29.
FIGURE 2.2.3.3 G29 Operation Executed in the Tool Position Offset Mode
(d) Mirror image
Table 2.2.3.1 indicates how G29 is executed if it is specified in the mirror image (M95)
mode.
Table 2.2.3.1 G29 Operation Executed in Mirror Image Mode
Parameter pm4011 D2 Operation
0
Mirror image is applied to the intermediate positioning
point and the command values specified in the G29 block.
1 Alarm “0127” occurs.