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8.2.8
OPR method (6): Count method 2)
The following shows an operation outline of the "count method 2)" OPR method.
The "count method 2)" method is effective when a "zero signal" cannot be received. (Note that compared to the "count
method 1)" method, using this method will result in more deviation in the stop position during machine OPR.)
In the "count method 2)", as well as in the "count method 1)", machine OPR can be performed even in the following
situations:
• when near-point dog is ON
• after completion of a machine OPR
(1) Operation chart
1.
The machine OPR is started. (The machine begins the acceleration designated in "[Pr.51] OPR
acceleration time selection", in the direction designated in "[Pr.44] OPR direction". It then moves
at the "[Pr.46] OPR speed" when the acceleration is completed.)
2.
The machine begins decelerating when the near-point dog ON is detected.
3.
The machine decelerates to the "[Pr.47] Creep speed", and subsequently moves at that speed.
4.
The pulse output from the LD75 will stop and the machine OPR will be completed when the
machine moves the movement amount set in "[Pr.50] Setting for the movement amount after near-
point dog ON " from the near-point dog ON position.
Machine OPR start
(Positioning start signal)
[Y10,Y11,Y12,Y13]
OPR request flag
Status: b3
Md.31
OPR complete flag
Status: b4
Md.31
Axis operation status
Md.26
Movement amount
Md.34
after near-point dog ON
Current feed value
Md.20
Machine feed value
Md.21
V
Pr.46
OPR speed
1.
Near-point dog
OFF
ON
OFF
ON
OFF
OFF
OPR
Standby
0
Inconsistent
Inconsistent
Value the machine moved is stored
Pr.50
Setting for the movement amount
after near-point dog ON
Pr.47
Creep speed
t
2.
3.
4.
Movement amount after near-point dog ON
Md.34
Leave sufficient distance from
the OP position to the near-point
ON
dog OFF
ON
Standby
Value of
*
OP address
CHAPTER 8 OPR CONTROL
*
335
8
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Troubleshooting
