Mitsubishi GX Configurator-PT, Руководство пользователя

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MELSEC-Q
8 OPR CONTROL
8.2 Machine OPR control
8.2.1 Outline of the machine OPR operation
Important
(1) Always set the OP in the same direction as viewed from any position in the
workpiece moving area (set the OP near the upper or lower limit of the
machine).
(2) Correctly set the OPR direction as the direction in which the workpiece moves
toward the OP.
(3) When the following two conditions hold, operation is performed at the OPR
speed since the near-point dog is not detected at an OPR control start.
•
OPR control is started in the position where the near-point dog is OFF.
•
The near-point dog does not exist in the OPR direction as seen from the
position where OPR control is started.
In such a case, perform JOG operation to move the axis to the position where
the near-point dog exists in the OPR direction and the near-point dog is OFF.
(Refer to Chapter 10 for details of JOG operation.)
(4) In deceleration operation from the OPR speed, the data used as the
deceleration time differs between "deceleration made by turning ON the near-
point dog" and "deceleration made by turning ON the axis stop signal".
(Refer to "Section 4.3 List of OPR data" for details.)
Make setting with full consideration given to the influence on the machine.
Machine OPR operation
In a machine OPR control, a near-point dog and zero signal are used to establish a
machine OP.
None of the address information stored in the QD70, PLC CPU, or drive unit is used
at this time. The position mechanically established after the machine OPR control is
regarded as the "OP" to be the starting point for positioning control.
The method for establishing an "OP" by a machine OPR control differs according to
the method set in "OPR. 1 OPR method".
The following shows the operation when starting "machine OPR control".
1)
The "machine OPR control" is started.
2)
The operation starts according to the speed and direction set in the OPR data ( OPR. 1 to
OPR. 9 ).
3)
The "OP" is established by the method set in " OPR. 1 OPR", and the machine stops. (Refer to
sections "8.2.2" to "8.2.8")
4)
If "a" is set as "OPR. 3 OP address", "a" will be stored as the current position in the "Md. 1
Current feed value" which is monitoring the position.
5) The "machine OPR control" is completed.
Refer to "Section 4.3 List of OPR data" for details of OPR data.
The "OPR. 3 OP address" is a fixed value set by the user.
M
OP
Near-point dog
Machine OPR control
Fig. 8.1 Example of a machine OPR control
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