Mitsubishi Electronics QD75P, QD75D user manual Limits to interpolation control, Speed limit

9MAJOR POSITIONING CONTROL

POINT

MELSEC-Q

•When the "reference axis speed" is set during 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 " value".

Pr.8

Speed limit

Limits to interpolation control

There are limits to the interpolation control that can be executed and speed

( Pr.20 Interpolation speed designation method) that can be set, depending on

the "

Pr.1

Unit setting" of the reference axis and interpolation axis. (For example,

circular interpolation control cannot be executed if the reference axis and interpolation axis units differ.)

The following table shows the interpolation control and speed designation limits.

									Unit setting 1
								Pr.1
"		Control system"				Interpolation speed	Reference axis and interpolation
	Da.2				Pr.20					Reference axis and
		interpolation control				designation method	axis units are the same, or a
										interpolation axis units
							combination of "mm" and "inch".
							3			differ 3
Linear 2 (ABS, INC)				Composite speed
Fixed-feed 2				Reference axis speed
Circular sub			(ABS, INC)	Composite speed			2
Circular right			(ABS, INC)
				Reference axis speed
Circular left			(ABS, INC)
Linear 3 (ABS, INC)				Composite speed
Fixed-feed 3				Reference axis speed
Linear 4 (ABS, INC)				Composite speed
Fixed-feed 4				Reference axis speed

: Setting possible, : Setting not possible.

1 "mm" and "inch" unit mix possible.

2 "degree" setting not possible. A "Circular interpolation not possible (error code: 535)" will occur and the position cannot start if circular interpolation control is set when the unit is "degree". The machine will immediately stop if "degree" is set during positioning control.

3 The unit set in the reference axis will be used for the speed unit during control if the units differ or if "mm" and "inch" are combined.

Axis operation status during interpolation control

"In interpolation" will be stored in the "

Md.26

Axis operation status" during

interpolation control. "Standing by" will be stored when the interpolation operation is terminated. Both the reference axis and interpolation axis will carry out a deceleration stop if an error occurs during control, and "error occurring" will be stored in the operation status.

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