
B-63323EN-1/03 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
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7.1.7.2 Feedrate override
General
A programmed feedrate can be reduced or increased by a percentage
(%) selected by the override dial. This feature is used to check a
program.
For example, when a feedrate of 100 mm/min is specified in the
program, setting the override dial to 50% moves the tool at 50 mm/min.
Fig. 7.1.7 (b) Feedrate override
Signal
Feedrate Override signal
*FV0 to *FV7 <G012>
[Classification] Input signal
[Function] These signals override the cutting feedrate. Eight binary code signals
correspond to override values as follows:
∑
×
.
A
A*!8*" %|2| Vi
i
@
Vi=0 when *FVi is "1" and
Vi=1 when *FVi is "0"
These signals have the following weight.
*FV0 : 1% *FV1 : 2%
*FV2 : 4% *FV3 : 8%
*FV4 : 16% *FV5 : 32%
*FV6 : 64% *FV7 : 128 %
When all signals are "0", they are regarded as overriding 0%
in the same way as when all signals are "1" .
Thus, the override is selectable in steps over a range of 0 to 254%.
[Operation] Actual feedrate is obtained by multiplying the speed
specified in cutting feed in automatic operation mode by the override
value
selected by this signal.
Tool
Check the machining by altering
the feedrate from the value
specified in the program.
Feedrate 100 mm/min
(Specified by programmed)
Feedrate 50 mm/min after
feedrate override