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8.2.2
Machine OPR method
The method by which the machine OP is established (method for judging the OP position and machine OPR
completion) is designated in the machine OPR according to the configuration and application of the positioning
method.
The following table shows the six methods that can be used for this OPR method. (The OPR method is one of the
items set in the OPR parameters. It is set in "[Pr.43] OPR method" of the basic parameters for OPR.)
[Pr.43] OPR method
Near-point dog method
Stopper method 1)
Stopper method 2)
Stopper method 3)
Count method 1)
Count method 2)
*1
The following are the signals input as the zero signals of the LD75 in the corresponding OPR methods.
• Near-point dog method, count method 1)
Signal that is output as a single pulse at one motor revolution (e.g. Z-phase signal output from the drive unit)
• Stopper method 2), 3)
Signal that is output on detection of contact with the stopper (Input externally)
The following shows the external I/O signals used for machine OPR.
: Necessary, : Necessary as required, : Unnecessary
[Pr.43] OPR method
Near-point dog
Near-point dog method
Stopper method 1)
Stopper method 2)
Stopper method 3)
Count method 1)
Count method 2)
Deceleration starts by the OFF ON of the near-point dog. (Speed is reduced to "[Pr.47] Creep speed".)
The operation stops at the first zero signal
When a "deviation counter clear output" is completed, the machine OPR is completed.
The stopper position is regarded as the OP.
After the deceleration starts by the OFF ON of the near-point dog, the machine presses against the stopper at the
"[Pr.47] Creep speed" and stops.
The machine OPR is regarded as completed on completion of the deviation counter clear output provided after "[Pr.49]
OPR dwell time" passed after stoppage.
The stopper position is regarded as the OP.
After the deceleration starts by the OFF ON of the near-point dog, the machine presses against the stopper at the
"[Pr.47] Creep speed" and stops.
The machine OPR is regarded as completed on completion of the deviation counter clear output provided after the zero
*1
signal
is detected after stoppage.
The stopper position is regarded as the OP.
The machine starts at the "[Pr.47] Creep speed" from the beginning, then presses against the stopper at the "[Pr.47]
Creep speed" and stops.
The machine OPR is regarded as completed on completion of the deviation counter clear output provided after the zero
*1
signal
is detected after stoppage.
The deceleration starts by the OFF ON of the near-point dog, and the machine moves at the "[Pr.47] Creep speed".
The machine stops at the zero signal
near-point dog ON" from the near point dog OFF ON position. When a "deviation counter clear signal output" is
completed, the machine OPR is regarded as completed.
The deceleration starts by the OFF ON of the near-point dog, and the machine moves at the "[Pr.47] Creep speed".
The machine moves the distance set in the "[Pr.50] Setting for the movement amount after near-point dog ON" from the
near point dog OFF ON position, and stops at that position. The machine OPR is then regarded as completed.
Signal required for control
Zero signal
Operation details
*1
after the near-point dog turns from ON OFF.
*1
after moving the distance set in the "[Pr.50] Setting for the movement amount after
Upper/lower limit
Deviation counter
switches
CHAPTER 8 OPR CONTROL
Torque limit
clear output
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