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

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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