
PROGRAMMING22. RISC PROCESSOR
B–63534EN/02
608
(1) Linear acceleration/deceleration before interpolation or bell–shaped
acceleration/deceleration before interpolation
(Acceleration change time constant type)
(2) Deceleration function based on feedrate differences at corners
(3) Advanced feed–forward function
(4) Feedrate determination based on acceleration on each axis
(5) Deceleration function based on Z–axis fall angle
(6) 200–block multi–buffer function
There are two types of acceleration/deceleration, the linear
acceleration/deceleration type and the bell–shaped acceleration/
deceleration type. When bit 7(BDO) and bit 1(NBL) of parameter
No.8402 is set to 1 or bit 3(RSB) of parameter No.1603 is set to 1,
bell–shaped acceleration/deceleration is assumed. Bell–shaped
acceleration / deceleration produces smoother acceleration / deceleration.
Deceleration starts in advance so that the feedrate specified for a block can
be attained when the block is executed.
Programmed speed
Feedrate obtained by
acceleration/
deceleration
before interpolation
P1
P2
N2N1
F1
F2
F3
Feedrate
Time
To decrease the feedrate from F3 to F2, deceleration must be started from
P1.
To decrease the feedrate from F2 to F1, deceleration must be started from
P2.
Because multiple blocks are read in advance, deceleration can be
performed over all those blocks.
22.1.1
Look–ahead
Acceleration/Decelerati
on Before Interpolation
Acceleration/
deceleration types
Look–ahead linear
acceleration/deceleration
before interpolation
D Example of deceleration