Yaskawa Varispeed 626M5 - Manual (Page 163)

Magnetic Sensor Orientation Control
9.10.1 Fixed Position Stopping Operation Using the Magnetic Sensor
9 -14
9.10 Functions
This section explains in detail the Magnetic Sensor orientation control mode functions.
Orientation Control Application Precautions
In the following cases, be sure to adjust the tuneup and parameters before using the orientation function.
S When using the orientation function for the first time after mounting the inverter to the machine
S When replacing the Motor or Encoder
S When changing the wiring between devices
For details on the tuneup, refer to the adjustment procedure.
This section explains the Magnetic Sensor system fixed position stopping operation and user-set position
stopping operation.
9.10.1 Fixed Position Stopping Operation Using the Magnetic Sensor
When the orientation signal is input while the motor is rotating (or while the motor is stopped), the load
shaft immediately decelerates (or accelerates) to the orientation speed that has been set.
After attaining the set speed, the motor rotates until the Magnet and the center of the Magnetic Sensor are
aligned according to the servo loop, which uses the motor encoder signal from the point that the load shaft
Magnet passes the stop position, and stops at the fixed position using the Magnetic Sensor signal. The ori-
entation completion signal (ORE) is output at the same time.
After orientation has been completed, the servo loop will still continue to operate unless the orientation
completion signal is turned OFF, so even if external force is applied to the load shaft, the shaft will not slip
easily from the positioning point.
The timing chart for the positioning operation is shown in the following diagram.
0
ON
ON
ON
Operation signal
(FWD or REV)
Orientation signal
(ORT)
Orientation completion signal
(ORE)
Speed
( Reference)
( Actual speed)
Orientation speed
Operation time
Position signal (for control)
(Magnetic Sensor output)
(a) Stopping at Specified Position when Motor is Rotating
0
ON
ON
Operation signal
(FWD or REV)
Orientation signal
(ORT)
Orientation completion signal
(ORE)
Position signal (for control)
(Magnetic Sensor output)
Operation time
(b) Stopping at Specified Position when Motor is Stopped
Speed
( Reference)
( Actual speed)
Note: If there is no slip in the gear mechanism and the parameters have been set correctly, the
motor will stop smoothly using the servo loop.
Fig 9.16 Positioning Operation
9
IMPORTANT