Yaskawa YASNAC PC NC Programming Manual - Manual (Page 179)

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YASNAC PCNC Programming Manual Chapter 4: Enhanced Level Commands
by specifying G80.
• When G94 is specified after the completion of solid tap, an F command value is reset
to “0”. Make sure to specify an F command when a program including cutting feed is
specified after the designation of G94.
(6) Functions Related to Solid Tap
If the options related to the solid tap function are selected, the following functions are added
or modified.
(a) Display of synchronization error in solid tapping
• While in the solid tap mode, the servo lag error display screen displays the following
data.
X-axis . . . Spindle servo lag error
Y-axis . . . Synchronization error between the spindle and Z-axis
Note that the value indicated for Y-axis is not accurate if the operation is executed
continuously (single block OFF).
• If “pm4015 D6 = 1”, it is possible to display the peak value of the number of synchro-
nization error pulses for X-axis and Z-axis. (X-axis: Positive peak value; Z-axis: Neg-
ative peak value)
(b) Error detect in the solid tap mode
By setting “1” for parameter pm4015 D5, it is possible to set the error detect OFF mode
for rapid traverse (X- and Y-axis positioning, Z-axis positioning) during solid tap.
By this setting, cycle time can be reduced. In this case, the program must be made care-
fully since the program advances to the Z-axis block immediately after the completion of
pulse distribution for the positioning of the X- and Y-axis.
(c) High-speed return speed in solid tap
• By setting a numeral “n” for parameter pm1252, the cutting speed is controlled during
solid tap so that the feedrate in the return motion will be “n” times (0.1 £ n £ 25.5) the
feedrate applied in the cutting motion.
pm1252 Programmable range:0 to 255
Setting: 1 = 0.1 times (If “pm 1252 = 0”, setting of
“1” is equivalent to 1 time.)
• For spindle speed, the value of “S command value × multiplication ratio” is clamped at
the maximum speed for solid tap.