Machine Opr Method - Mitsubishi Electric MELSEC-Q QD75M User Manual

8 OPR CONTROL

8.2.2 Machine OPR method

Pr.43
Near-point dog method
Count method 1)
Count method 2)
Data set 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 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 "
method" of the basic parameters for OPR.)
OPR method
Deceleration starts by the OFF
" Pr.47
Creep speed".)
The operation stops once after the near-point dog turns ON and then OFF. Later the
operation restarts and then stops at the first zero signal to complete the OPR.
The deceleration starts by the OFF
at the " Pr.47
The machine stops once after moving the distance set in the " Pr.50
movement amount after near-point dog ON" from the OFF
operation restarts and then stops at the first zero signal to complete the machine OPR.
The deceleration starts by the OFF
at the " Pr.47
The machine moves the distance set in the " Pr.50
after near-point dog ON" from the near-point dog OFF
position. The machine OPR is then regarded as completed.
The position where the machine OPR has been performed becomes an OP.
The current feed value and feed machine value are overwritten to the OP address.
REMARK
Creep speed
The stopping accuracy is poor when the machine suddenly stops from fast speeds. To
improve the machine's stopping accuracy, its must change over to a slow speed before
stopping. This speed is set in the "
Operation details
ON of the near-point dog. (Speed is reduced to
ON of the near-point dog, and the machine moves
Creep speed".
ON of the near-point dog, and the machine moves
Creep speed.
Pr.47 Creep speed".
8 - 5
MELSEC-Q
Pr.43
Setting for the
ON position. Later the
Setting for the movement amount
ON position, and stops at that
OPR