Machine Opr Control; Outline Of The Machine Opr Operation - Mitsubishi MELSEC-Q Series User Manual

8
OPR CONTROL
8.2

Machine OPR Control

8.2.1
In machine OPR control, near-point dog and zero signal are used to establish a machine
OP.
None of the address information stored in the QD72P3C3, programmable controller CPU
or drive unit is used at this time.
After the machine OPR control, mechanically established position is regarded as the "OP",
reference for positioning control.
The method for establishing "OP" by a machine OPR control depends on "
method".
The following describes the operation when starting machine OPR control.
8
- 2 8.2 Machine OPR Control

8.2.1 Outline of the machine OPR operation

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 so that it can be the same direction with the
workpiece traveling direction to the OP.
(3) When the following two conditions are satisfied, the axis continues operating
at the OPR speed since near-point dog is not detected at machine OPR
control start.
• Machine OPR control is started at the position where the near-point dog
is OFF.
• The near-point dog does not exist in the OPR direction as seen from the
machine OPR control start position.
In this 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.
(For details of JOG operation, refer to Chapter 10.)
Machine OPR control operation
1) The machine OPR control is started.
The operation starts according to the direction and speed set in the OPR parameter
2)
( to
Pr.10 Pr.15
The "OP" is established by the method set in "
3)
ÅiRefer to Section 8.2.3 and Section 8.2.4.)
If "a" is set as "
4)
" Current feed value" which is monitoring the position.
Md.1
5) The machine OPR control is completed.
* For details of OPR parameter, refer to "Section 4.2 Parameter List".
).
OP address", "a" will be stored as the current position in the
Pr.12
Pr.10
OPR method", and the axis stops.
Pr.10
OPR