Mitsubishi Electric MELSERVO-J5 User Manual page 356

• [Pr. PL17.1 Load to motor mass ratio/load to motor inertia ratio selection]
Setting value
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Initial value: 0
Setting of identification signal amplitude by minute position detection method
If [AL. 032 Overcurrent], [AL. 050 Overload 1], [AL. 051 Overload 2], or [AL. 0E1 Overload warning 1] occurs at the magnetic
pole detection by the minute position detection method, set a smaller value for [Pr. PL18 Magnetic pole detection - Minute
position detection method - Identification signal amplitude]. Basically, [Pr. PL18] does not need to be changed from the initial
value.
Operation at magnetic pole detection
Precautions
• After the magnetic pole detection, check the positioning accuracy with the test operation (positioning operation function) of
MR Configurator2.
• When the absolute position linear encoder is used, if a gap is generated to the positional relation between the linear
encoder and the linear servo motor, perform the magnetic pole detection again.
• The magnetic pole detection improves in accuracy when performed with no load.
■For incremental encoder
For the incremental linear encoder, the magnetic pole detection is required every time the power is turned on or the software
is reset.
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 [Pr. PL01.0 Servo motor magnetic pole detection selection] for executing
magnetic pole detection.
• Timing chart
Servo-on command
Base circuit
RD (Ready)
*1 The magnetic pole detection time indicates the operation time when LSP (Forward rotation stroke end) and LSN (Reverse rotation
stroke end) are on.
10 USING A LINEAR SERVO MOTOR
354
10.2 Startup [G] [WG]
ON
OFF
100 ms
ON
OFF
ON
OFF
15 s or less
Magnetic pole detection time
Load to motor mass ratio/load to motor inertia ratio
10 times or less
10 multiplier
20 multiplier
30 multiplier
40 multiplier
50 multiplier
60 multiplier
70 multiplier
80 multiplier
90 multiplier
100 multiplier
110 multiplier
120 multiplier
130 multiplier
140 multiplier
150 times or more
*1