15. USING A LINEAR SERVO MOTOR
15 - 25
15.4 Characteristics
15.4.1 Overload protection characteristics
An electronic thermal is built in the servo amplifier to protect the linear servo motor, servo amplifier and
linear servo motor power wires from overloads.
[AL. 50 Overload 1] occurs if overload operation performed is above the electronic thermal protection curve
shown in fig. 15.2. [AL. 51 Overload 2] occurs if the maximum current is applied continuously for several
seconds due to machine collision, etc. Use the equipment on the left-side area of the continuous or broken
line in the graph.
Use the linear servo motor with 70% or less of the effective load ratio when it is in the servo lock state or in a
small reciprocating motion.
This servo amplifier has solid-state linear servo motor overload protection. (The servo motor overload
current (full load current) is set on the basis of 120% rated current of the servo amplifier.)
1000
100
10
1
0.1
0
50
150
200
250
300
100
Operation time [s]
Load ratio [%]
Servo-lock
Operating
1000
100
10
1
0.1
0
200
300
400
100
Operati
on ti
me [s]
Load ratio [%]
Operating
Servo-lock
a. LM-H3 series
LM-K2 series
b. LM-U2 series
1000
100
10
1
0.1
0
100
300
400
500
600
200
Operation time [s]
Load ratio [%]
Operating
Servo-lock
1000
100
10
1
0.1
0
50
150
200
250
300
100
Operation time [s]
Load ratio [%]
Operating
Servo-lock
c. LM-F series (natural cooling)
d. LM-F series (liquid cooling)
Fig. 15.2 Electronic thermal protection characteristics
Summary of Contents for MR-J4-100A
Page 9: ...A 8 MEMO ...
Page 61: ...1 FUNCTIONS AND CONFIGURATION 1 44 MEMO ...
Page 67: ...2 INSTALLATION 2 6 MEMO ...
Page 137: ...3 SIGNALS AND WIRING 3 70 MEMO ...
Page 261: ...6 NORMAL GAIN ADJUSTMENT 6 24 MEMO ...
Page 291: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 30 MEMO ...
Page 299: ...8 TROUBLESHOOTING 8 8 MEMO ...
Page 319: ...9 OUTLINE DRAWINGS 9 20 MEMO ...
Page 461: ...12 ABSOLUTE POSITION DETECTION SYSTEM 12 36 MEMO ...
Page 511: ...14 COMMUNICATION FUNCTION 14 38 MEMO ...
Page 559: ...16 USING A DIRECT DRIVE MOTOR 16 20 MEMO ...
Page 583: ...17 FULLY CLOSED LOOP SYSTEM 17 24 MEMO ...
Page 621: ...APPENDIX App 38 ...
Page 639: ......