Mitsubishi Electric MELSEC-L LD75P User Manual page 379

● When the "reference axis speed" is set during 4-axis linear interpolation control, set so the major axis side becomes the
reference axis. If the minor axis side is set as the reference axis, the major axis side speed may exceed the "[Pr.8] Speed
limit value".
● Refer to  Page 359, Section 9.1.6 for the combination of the reference axis with the interpolation axis.
(2) 4-axis linear interpolation control (INC linear 4)
In incremental system 4-axis linear interpolation control, designated 4 axes are used. Linear interpolation
positioning of movement amount set in "[Da.6] Positioning address/movement amount" is carried out from the
current stop position (start point address). The movement direction is determined by the sign of the movement
amount.
(a) Positioning data setting example (Reference axis is designated as axis 1.)
The following table shows setting examples when "4-axis linear interpolation control (INC linear 4)" is set in
positioning data No. 1 of axis 1. (The required values are also set in positioning data No. 1 of axis 2, axis 3 and
axis 4.)
Setting item
[Da.1] Operation pattern
[Da.2] Control system
Acceleration time
[Da.3]
No.
Deceleration time
[Da.4]
No.
Axis to be
[Da.5]
interpolated
Positioning
data No.1
Positioning
[Da.6] address/moveme
nt amount
[Da.7] Arc address
[Da.8] Command speed
[Da.9] Dwell time
[Da.10] M code
Refer to  Page 152, Section 5.3 for information on the setting details.
Axis 1 Axis 2
(reference axis) (interpolation
setting axis) setting
example example
Positioning

complete

INC linear 4

1

0
 
4000.0m 8000.0m
 

6000.00mm/min
500ms 

10
CHAPTER 9 MAJOR POSITIONING CONTROL
Axis 3 Axis 4
(interpolation (interpolation
axis) setting axis) setting
example example
Set "Positioning complete"
 
assuming that the next positioning
data will not be executed.
Set incremental system 4-axis linear
 
interpolation control.
Designate the value set in "[Pr.25]
 
Acceleration time 1" as the
acceleration time at start.
Designate the value set in "[Pr.10]
 
Deceleration time 0" as the
deceleration time at deceleration.
Setting not required. (Setting value
will be ignored.)
  When axis 1 is used as a reference
axis, the interpolation axes are axes
2, 3 and 4.
Set the movement amount.
4000.0m 3000.0m (Assuming "mm" is set in "[Pr.1] Unit
setting".)
Setting not required. (Setting value
 
will be ignored.)
 
Set the speed during movement.
Set the time the machine dwells
after the positioning stop (pulse
 
output stop) to the output of the
positioning complete signal.
Set this when other sub operation
commands are issued in
 
combination with the No. 1
positioning data.
9
Setting details
377