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ORIENTATION CONTROL—A500(L)
3.7 Instructions
(1) The encoder should be coupled with the motor shaft or the spindle oriented with a speed ratio of 1 to 1
without any mechanical looseness.
(2) The DC injection brake operated for positioning must be released in the shortest time (within several
seconds). Operating the brake continuously can cause the motor to generate heat and burn out.
(3) The servo lock function is not available after positioning stop. If the spindle must be held securely,
prepare an appropriate holding means such as a mechanical brake or a dowel pin.
(4) To ensure correct positioning, the encoder must be set in the proper rotation direction and the A and B
phases connected correctly.
(5) The orientation fault signal may be output if the pulse signal is not given from the encoder during
orientation due to an open cable, etc.
(6) When orientation control is exercised, orientation cannot be completed if "no DC injection brake
operation" is set in the DC injection brake adjusting (voltage, frequency, speed, time) parameters.
These parameters must be set to operate the DC injection brake.
(7) To terminate orientation, the start signal (STF or STR) must be first switched off and the orientation
signal (X22) must be switched off. As soon as this orientation signal is switched off, orientation control
ends. Depending on the Pr.358 "servo torque selection" settings, the orientation state remains if the
orientation signal is on even after the DC injection brake is released at the switching off of the start
signal. Therefore, the orientation status of the monitor function does not return to 0.)
(8) When the retry function of in Pr. 358 "servo torque selection" is selected, the retry operation is
performed three times including the first orientation.
(Note: The first orientation counts as 1 retry.)