Yaskawa YASNAC PC NC Programming Manual - Manual (Page 144)

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YASNAC PCNC Programming Manual Chapter 4: Enhanced Level Commands
(c) Description of the addresses
Table 4.1.1.3 Description of the Addresses
t Initial Point Level
The initial point level is the absolute position of the point where the hole machining axis is located when the NC mode enters the canned
cycle mode from the canned cycle cancel state. The initial point level is not changed if a canned cycle is executed in the G99 (R-point level
return) mode.
(d) Changing the initial-point level
The initial point level can be changed by using address W; the return operation to the new
level is called the W-point level return.
• With the W command specified in the G91 mode (an incremental command), W-point
level is set in reference to the initial point level specified in the preceding block.
• In the G98 mode (initial point level return), single-block stop does not occur at the R-
point level, but at the W-point level or the initial point level.
• If the W-axis is set for an additional axis, the W command cannot be used to change
the initial point level. In this case, if address W is specified, it is regarded as an axis
command.
Address Description
• X, Y
(Positioning axes)
The hole machining position is specified by either incremental or absolute
values. For positioning operation, G00 or G01 mode can be selected by the
setting for a parameter. If the G01 mode is selected, positioning at the hole
machining position is executed at a feedrate specified by an F code.
• Z (hole machining axis) The position of the hole bottom is specified by either an absolute value or an
incremental value referenced to the R-point level. Axis move from the R-
point level to the bottom of the hole is controlled in the G01 mode using the
feedrate specified by an F code. With some types of canned cycles, G00
operation is included (intermittent feed, for example).
Return motion from the bottom of the hole to the R-point level is controlled
in the G00 or G01 mode.
• R (hole machining feed
start level)
The position of R-point level is specified by either an absolute value or an
incremental value. The feed axis is the hole machining axis. Return opera-
tion from the R-point level to the initial point level is controlled in the G00
mode.
• L (number of repetitions) The number of repetitions is specified by address L. If designation of
address L is omitted, “L1” is assumed. If “L = 0” is specified, only position-
ing at (X, Y) is executed.