
B–64113EN–1/01
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
381
An override of four steps (F0, 25%, 50%, and 100%) can be applied to the
rapid traverse rate. F0 is set by a parameter (No. 1421).
Also, 1% rapid traverse override select signal allows rapid traverse
override every 1% in the range of 0 to 100%.
Rapid traverse
rate10m/min
Override
50%
5m/min
Fig.7.1.7.1 Rapid traverse override
Actual feedrate is obtained by multiplying the rapid traverse rate preset
by parameter no.1420 by the override value determined by this signal,
whether in automatic or manual operation (including manual reference
position return).
For F0 value, an absolute value is set by parameter no.1421 within a range
of 0 to rapid traverse rate (for each axis).
1% step rapid traverse override selection signal HROV determines
whether rapid traverse override specified with rapid traverse override
signals ROV1 and ROV2 is used or 1% step rapid traverse override is
used.
When signal HROV is 0, override is applied to the rapid traverse rate
using signals ROV1 and ROV2.
When signal HROV is 1, ROV1 and ROV2 are ignored, 1% step rapid
traverse override signals *HROV0 to *HROV6 being used to override the
rapid traverse rate.
These 1% step rapid traverse override signals are also effective to the rapid
traverse rate for the PMC axis. When rapid traverse override is applied
to the PMC axis (using signals ROV1E and ROV2E) with the setting of
the OVE bit (bit 2 of parameter No. 8001) independently of the CNC, the
1% step rapid traverse override signals are ineffective.
7.1.7
Override
7.1.7.1
Rapid traverse override
General
D Feedrate
D F0 rate
D 1% step rapid traverse
override selection signal
D PMC axis control