
B--63003EN--1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
634
CAUTION
1 When the total distance for the blocks under advanced
preview control is equal to or less than the deceleration
distance from the current feedrate, deceleration starts.
When advanced preview control has proceeded upon the
completion of deceleration, and the total distance for the
blocks increases,acceleration starts. Especially, when a
series of blocks containing very small amounts of travel are
specified, deceleration and acceleration may be alternated,
which prevents the feedrate from becoming constant. In
such a case, specify a lower feedrate.
2 When the dry run signal is inverted from 0 to 1 or from 1 to
0 during movement along an axis, the speed of movement
is increased or reduced to a specified speed without first
being reduced to zero.
3 When a no-- movement block or a one -- shot G code such as
G04 is encountered in simple high-- precision contour
control mode, the movement is decelerated and halted in
the preceding block.
NOTE
1 As accel er ati on after interpol ati on, use li near or bell--shaped
accel er ati on. Exponential accel er ati on/decel eration cannot
be used.
2 Upon switching to simple high-- precision contour control
mode, all manual handle interrupts are ignored.
Series
16i/160i/18i/180i
OPERATOR’S MANUAL
(For Machining Center)
(B--63014EN)
II.19.6 Simple high --precision contour
control
Caution
Note
Reference item