Yaskawa YASNAC PC NC Programming Manual - Manual (Page 91)

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YASNAC PCNC Programming Manual Chapter 3: Movement Control Commands
Table 3.4.4.2 Plane Selection G Codes
• It is not allowed to change the selected plane in the offset mode. If a plane selection G
code is specified in the offset mode, alarm “’0183” occurs.
• The tool radius offset C function is not val id for the 4th- and 5th-axis. These axes are
treated as an axis not in the selected offset plane.
(2) Entering the Offset Mode
There are two types of offset mode entry methods (types A and B) and which method
should be used can be selected by the setting for a parameter.
(a) Type A: pm4012 D6 = 0
Start-up motion (axis movements for the start-up of offset) is not executed if there are no
axis movement commands in the G41 or G42 block.
• Start-up motion is executed when an axis move command is specified.
• If there are no move commands of the axes in the offset plane in the block next to the
G41 or G42 block, one more block is buffered to execute the start-up motion.
• In the offset mode, specification of up to two consecutive blocks that do not contain
axis move (commands in the offset plane is allowed. However, if no axis move com-
mand in the offset plane is specified in three or more consecutive blocks, offset motion
is interrupted and the offset block is not generated.
(b) Type B: pm4012 D6 = 1
Start-up motion (axis movements for the start-up of offset) is executed even when an axis
move command is not specified in the G41 or G42 block.
• In response to the designation of G41 or G42, the cutting tool moves to the position
offset by the radius. The offset is made to the left or right side in reference to the tool
advancing direction and in the normal direction at the start point of the next block.
• If there are no axis move commands in the offset plane in the G41 or G42 block, the
axes move by the offset amount.
• If there are no move commands of the axes in the offset plane in the block next to the
G41 or G42 block, one more block is buffered to execute the start-up motion.
• In the offset mode, specification of up to two consecutive blocks that do not contain
G code Function Group
G17 XY plane selection 02
G18 ZX plane selection 02
G19 YZ plane selection 02
pm4012 D6 = 0 Type A
pm4012 D6 = 1 Type B