
B-63323EN-1/03 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
- 697 -
- When bit 6 (OVR) of parameter No. 1403 = 0
The conventional specifications apply.
Override is invalid for deceleration functions such as deceleration
based on feedrate difference and deceleration based on
acceleration rate.
- When bit 6 (OVR) of parameter No. 1403 = 1
Override is valid for deceleration functions such as deceleration
based on feedrate difference and deceleration based on
acceleration rate.
When bit 6 (OVR) of parameter No. 1403 is 1, the following feedrates
can be overridden:
- Feedrate decelerated by deceleration based on feedrate difference
in look-ahead acceleration/deceleration before interpolation
- Feedrate decelerated by deceleration based on acceleration rate in
fine HPCC.
- Feedrate decelerated by deceleration based on acceleration rate in
circular interpolation
- Feedrate decelerated by acceleration clamp in involute
interpolation
- Minimum feedrate for deceleration based on acceleration rate in
fine HPCC and circular interpolation
- Maximum feedrate of fine HPCC
Even when the feedrate is overridden, the resulting feedrate does not
exceed the maximum cutting feedrate (parameter No. 1422).
Restrictions
- Conditions under which look-ahead acceleration/deceleration before interpolation
are performed
Even when look-ahead acceleration/deceleration before interpolation
mode are specified, look-ahead acceleration/deceleration before
interpolation are not performed if any of the following conditions is
satisfied:
- The system is in threading mode.
- The system is in feed-per-revolution mode (G95).
- The system is in tapping mode (G93).
- The system is in a canned cycle (other than G80).
- No move command is issued.
- The machine is positioning the spindle
- One-shot G code other than G38, G45, G46, G47, G48, G39, and
G09
- Positioning (G00, G60)
- Block with an alarm
In look-ahead acceleration/deceleration before interpolation mode, the
following functions cannot be executed. To execute any of the
following functions, cancel look-ahead acceleration/deceleration