
B--63003EN--1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
611
When a rapid traverse command is specified during automatic operation,
the function for positioning by optimul acceleration can be used to adjust
the rapid traverse rate, time constant, and loop gain, according to the
amount of travel for the block. This reduces the time required for
positioning and position check, therefore reducing the cycle time.
When rapid traverse is specified in automatic operation, the function
adjusts the rapid traverse rate, time constant, and loop gain to one of seven
levels, according to the amount of travel for the block. The relationship
between the amount of travel and the corresponding rapid traverse rate,
time constant, and loop gain are specified in parameters. This function
is not effective for cutting feed. (For cutting feed, the loop gain set in
parameter 1825 is used.)
This function is effective for all commands that cause rapid traverse in
automatic operation, including commands for canned cycles, automatic
reference position return, and machine coordinate system selection, as
well as the G00 command. This function, however, becomes ineffective
in the following cases, and the feedrate, time constant, and loop gain set
in parameters 1420, 1620 and 1825 are used:
(1)When an automatic reference position return (G28) is specified before
the reference position is established
(2)When the G00 command is executed on the RISC side in
high--precision contour control (when bit 7 (SG0) of parameter 8403
is set to 1)
(3)In AI contour control mode
(4)In Cs axis contour control mode
This function is not effective for cutting feed.
This function is not effective in manual operation. The function is not
effective for movement caused by manual numeric commands.
When rapid traverse is stopped by feed hold or mode change during
automatic operation, and manual operation is performed, the loop gain is
changed to the value set in parameter 1825. When the program is
restarted, the interrupted block is resumed without changing the loop gain
used in manual operation. Then, when the next and subsequent blocks are
executed, one of the values set in parameters 6181 to 6187 is used again
as the loop gain.
This function is not effective during PMC axis control.
When this function is enabled, rapid traverse overlap (enabled when bit
4 (RTO) of parameter 1601 is set to 1) is not performed.
7.1.15
Positioning by Optimul
Acceleration
General
Valid co mmands
Cutting feed
Manual operation
Manual intervention
PMC axis co n t rol
Rapid traverse overlap