Mitsubishi Electronics QD75P, QD75D Near pass function, Positioning data No Positioning data No

12CONTROL SUB FUNCTIONS

12.3.3 Near pass function

MELSEC-Q

When continuous pass control is carried out using interpolation control, the near pass function is carried out.

The "near pass function" is a function to suppress the mechanical vibration occurring at the time of switching the positioning data when continuous pass control is carried out using interpolation control.

[Near pass function]

The extra movement amount occurring at the end of each positioning data unit being continuously executed is carried over to the next positioning data unit. Alignment is not carried out, and thus the output speed drops are eliminated, and the mechanical vibration occurring during speed changes can be suppressed. Because alignment is not carried out, the operation is controlled on a path that passes near the position set in " Da.6 Positioning address/movement amount".

The details shown below explain about the "near pass function".

[1]Control details

[2]Precautions during control

[1]Control details

The following drawing shows the path of the continuous path control.

[The path of the near pass]

Da. 6 Positioning address
Path of positioning data No.3	Path of positioning data No. 4
	Speed dropping does not occur.
V

Positioning data No. 3 Positioning data No. 4

t

Fig. 12.10 The path of the continuous path control

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