
B–63523EN–1/03
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
776
[Classification] Input signal
[Function] These signals override the cutting feedrate. Eight binary code signals
correspond to override values as follows:
Override value = Σ | 2
i
×Vi | %
7
i=0
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 specified speed by the
override value selected by this signal.
The override is regarded as 100%, regardless of this signal, in the
following cases:
⋅Override cancel signal OVC is “1”.
⋅During cutting in tap cycle of canned cycle;
⋅Tapping mode (G63); or
⋅Thread cutting is in progress.
Signal
Feedrate Override signal
*FV0 to *FV7
<G012>