9 MAJOR POSITIONING CONTROL

Positioning data setting example

MELSEC-Q

[Reference axis and interpolation axis are designated as axis 1 and axis 2, respectively.]

The following table shows setting examples when "2-axis fixed-dimension feed control (fixed-feed 2)" 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

Setting item

Operation pattern

Da.2 Control method

 

Da.3

Acceleration time

 

 

No.

1

Da.4

Deceleration time

dataNo.

 

No.

Da.5

Axis to be

Positioning

 

interpolated

 

Positioning address/

 

 

 

 

movement amount

 

 

 

Axis 1

Da.7 Arc address

Da.8 Command speed

 

Da.9 Dwell time

Da.10 M code

Axis 1

 

Axis 2

 

 

 

 

 

 

(reference

(interpolation

 

 

Setting details

axis) setting

axis) setting

 

 

 

 

 

 

 

example

example

 

 

 

 

 

Positioning

 

 

Set "Positioning complete" assuming the next positioning

complete

 

 

data will not be executed.

 

 

 

 

 

Fixed-feed 2

 

 

Set 2-axis fixed-feed control.

 

 

 

 

 

 

 

Designate the value set in "

 

 

1

 

 

 

 

Pr.25

Acceleration time 1" as

 

 

 

 

the acceleration time at start.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Designate the value set in "

 

 

0

 

 

 

 

Pr.10

Deceleration time 0" as

 

 

 

 

the deceleration time at deceleration.

 

 

 

 

 

 

1

 

 

 

 

Set the axis to be interpolated (partner axis).

 

 

 

 

If the self-axis is set, an error will occur.

 

 

 

 

 

 

8000.0

m

6000.0

m

Set the positioning address. (Assuming "mm" is set in

 

 

 

 

 

 

 

"

Pr.1

Unit setting".)

 

 

 

 

 

 

 

 

 

 

 

 

– Setting not required (setting value will be ignored).

6000.00

 

Set the speed during movement. (Designate the composite

 

 

 

 

speed of reference axis speed in "

Pr.20

Interpolation

mm/min

 

speed designation method".)

 

 

 

 

Set the time the machine dwells after the positioning stop

500ms

(pulse output stop) to the output of the positioning complete

 

 

signal.

10

Set this when other sub operation commands are issued in

combination with the No. 1 positioning data.

 

 

* Refer to Section 5.3 "List of positioning data" for information on the setting details.

POINT

When the "reference axis speed" is set during 2-axis fixed-feed 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".

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Mitsubishi Electronics QD75P, QD75D user manual Speed may exceed, Set 2-axis fixed-feed control