PROGRAMMING
19. HIGH SPEED CUTTING
FUNCTIONS
B–64124EN/01
400
The acceleration/deceleration reference speed is the feedrate used as the
reference for calculating optimum acceleration. In Fig.19.4 (c), it is
equivalent to the specified speed used to determine T1’ and T2’.
There are three methods for specifying the acceleration/deceleration
reference speed.
(1) Specifying the speed using an F in a G05.1 Q1 block
(2) Setting the speed on Parameter
(3) Setting the speed specified with the F command issued at the start of
cutting as the reference speed
NOTE
This function is effective if BCG (No. 7055 bit 3) is 1.
If an F command is used in a G05.1 Q1 block, the speed specified with
the F command is assumed the acceleration/deceleration reference speed.
This acceleration/deceleration reference speed is cleared upon a reset.
After the acceleration/deceleration reference speed is cleared upon a reset
or after the power is turned off and then on again, the
acceleration/deceleration reference speed specified for parameter No.
7066 will be used. (Method (2), described later)
If the acceleration/deceleration reference speed specified for the
parameter is 0, the feedrate assumed at the start of cutting will be assumed
the acceleration/deceleration reference speed. (Method (3), described
later)
(Program example)
G05.1 Q1 F5000 ; ··· Sets the reference speed to 5000 mm/min.
The F command used in a G05.1 block is used to
specify the acceleration/deceleration reference speed,
and is also used as a normal F command.
Even if the feedrate is changed during the execution of the machining
program, the acceleration/deceleration reference speed specified with the
above command remains in effect. If this occurs, the machining time may
become longer because machining is performed at the feedrate different
from the acceleration/deceleration reference speed.
For this reason, the acceleration/deceleration reference speed to be
specified with the above command should be as close as possible to the
actual machining speed.
NOTE
The G05.1Q1Fxxxx command must be issued in feed per
minute (G94) mode.
If this command is issued in another mode, the speed
specified with this command will be generated the alarm
(PS5111).
Description
D Methods of specifying the
acceleration/deceleration
reference speed
(1) Specifying the speed
in a G05.1 Q1 block