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14. USING A LINEAR SERVO MOTOR
(a) For the incremental linear encoder
For the incremental linear encoder, 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 not need to set the parameter (first
digit of [Pr. PL01]) for executing the magnetic pole detection.
1) Timing chart
2) Linear servo motor movement (when FLS (Upper stroke limit) and RLS (Lower stroke limit) are
on)
Note 1.
When FLS (Upper stroke limit) or RLS (Lower stroke limit) turns off during the magnetic pole detection, the operation of the
magnetic pole detection is carried on to the opposite direction. When both FLS and RLS are off, [AL. 27 Initial magnetic pole
2.
detection error] occurs.
The following shows the pitch against the magnetic pole.
POINT
When the incremental linear encoder is used, the magnetic pole detection is
required when the power is turned on.
Servo-on command
Base circuit
RD (Ready)
RD(
)
Note. The magnetic pole detection time indicates the operation time when FLS (Upper
stroke limit) and RLS (Lower stroke limit) are on.
Servo-on position
(Magnetic pole detection start position)
(
RLS
(Note 1)
( 1)
Linear servo motor series
Pitch against magnetic pole
[mm]
14 - 13
ON
OFF
95 ms
95ms
ON
OFF
ON
OFF
15 s or less
15s
Magnetic pole detection time (Note)
)
FLS
(Note 1)
( 1)
(Note 2)
( 2)
Magnetic pole detection completion position
LM-H3
Medium thrust
LM-F
(Continuous thrust:
Less than 400 N)
48
30
( )
LM-U2
Large thrust
LM-K2
(Continuous thrust:
400 N or more)
60
48
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