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4. OPERATION AND FUNCTIONS
4 - 4
(1) For the incremental system
For the incremental system, the magnetic pole detection is required every time the power is turned on. By
turning on the servo-on command from the controller after the power-on, the magnetic pole detection is
automatically carried out. Therefore, there is no need to set the parameters (first digit of parameter No.
PS01) for executing the magnetic pole detection.
(a) Timing chart
ON
OFF
ON
OFF
ON
OFF
95ms
Servo-on command
Base circuit
Ready (RD)
15s or less
Magnetic pole detection time (Note)
Note. The magnetic pole detection time indicates the operation time when the stroke limits
(FLS and RLS) is on.
(b) Direct drive motor movement (when FLS and RLS are on)
Magnetic pole detection complete position
Servo-on position (Magnetic pole detection start position)
Center of direct drive motor rotation part
FLS (Note)(Note) RLS
10deg or less
Note. When the stroke limit (FLS and RLS) turns off during the magnetic pole detection, the
operation of magnetic pole detection is carried on to the opposite direction. When both
FLS and RLS are off, the magnetic pole detection error (27) occurs.
(c) Direct drive motor movement (when FLS and RLS is off)
When the FLS and RLS are off at the servo-on, the magnetic pole detection is carried out as follows.
Magnetic pole detection complete position
After the machine moves to the position where the stroke
limit (FLS and RLS) is set, the magnetic pole detection
starts.
Center of direct drive motor rotation part
10deg or less
Magnetic pole detection
start position
Servo-on position
FLS
RLS