Mitsubishi Electric MELSEC-L LD75D, User Manual

Page: 407 / 818

405
CHAPTER 9 MAJOR POSITIONING CONTROL
9
9.
2 Set
ting t
he Pos
itioning
D
at
a
(c) Positioning data setting example
• Reference axis, circular interpolation axis, and linear interpolation axis are specified as axis 1, axis 2, and
axis 3, respectively.
The following table shows setting examples when "helical interpolation control with sub point designation
(ABS)" is set in positioning data No. 1 of axis 1. (The required values are also set in positioning data No. 1 of
axis 2 and axis 3.)
*1 Refer to "List of Positioning Data (

Page 152, Section 5.3)" for information on the setting details.
Set a value in "[Da.8] Command speed" so that the speed of each axis does not exceed the "[Pr.8] Speed limit value". (The
speed limit does not function for the speed calculated by the LD75 during interpolation control.)
Setting item
Axis 1 (reference
axis) setting
example
Axis 2 (circular
interpolation axis)
setting example
Axis 3 (linear
interpolation axis)
setting example
Setting details
Positioning
data No. 1
[Da.1] Operation pattern
Positioning
complete
 
Set "Positioning complete" assuming
that the next positioning data will not be
executed.
[Da.2] Control system ABS helical sub  
Set absolute system, 3-axis helical
interpolation control with sub point
designation.
[Da.3]
Acceleration time
No.
1  
Specify the value set in "[Pr.25]
Acceleration time 1" as the acceleration
time at start.
[Da.4]
Deceleration time
No.
0
 
Specify the value set in "[Pr.10]
Deceleration time 0" as the deceleration
time at deceleration.
[Da.5]
Axis to be
interpolated
Axis 2
 
Set the axis to be interpolated (partner
axis).
If the self-axis is set, an error will occur.
[Da.6]
Positioning
address/movement
amount
8000.0

m 6000.0

m 3000.0

m
Set the end point address. (Assuming
"mm" is set in "[Pr.1] Unit setting".)
[Da.7] Arc address 4000.0

m 3000.0

m

Set the sub point address. (Assuming
"mm" is set in "[Pr.1] Unit setting".)
[Da.8] Command speed 6000.00mm/min
 
Set the speed during movement to the
end point address. (Set the composite
speed in "[Pr.20] Interpolation speed
designation method".)
[Da.9] Dwell time 500ms  
Set the time the machine dwells from
the positioning stop (pulse output stop)
to the output of the positioning complete
signal.
[Da.10] M code 10  50
Set this item when other sub operation
commands are issued in combination
with the No. 1 positioning data.
Set the number of pitch for the linear
interpolation axis.