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1. FUNCTIONS AND CONFIGURATION
1.4 Function list
The following table lists the functions of this servo. For details of the functions, refer to the Reference
field.
(1) Drive unit (Abbreviation DRU)
Function Description Reference
High-resolution encoder High-resolution encoder of 131072 pulses/rev is used as a servo motor encoder.
Auto tuning
Automatically adjusts the gain to optimum value if load applied to the servo motor
shaft varies.
Chapter 7
Gain changing function
You can switch between gains during rotation and gains during stop or use an
external signal to change gains during operation.
Section 7.5.4
Adaptive vibration
suppression control
MELSERVO-J2M detects mechanical resonance and sets filter characteristics
automatically to suppress mechanical vibration.
Section 7.3
Low-pass filter
Suppresses high-frequency resonance which occurs as servo system response is
increased.
Section 7.4
Position smoothing Speed can be increased smoothly in response to input pulse.
DRU parameter
No. 7
Slight vibration
suppression control
Suppresses vibration of 1 pulse produced at a servo motor stop.
DRU parameter
No.20
Electronic gear Input pulses can be multiplied by 1/50 to 50.
DRU parameters
No. 3, 4, 69 to 71
Section 5.3.1
Torque limit Servo motor torque can be limited to any value.
DRU parameters
No.28
Command pulse selection Command pulse train form can be selected from among four different types.
DRU parameter
No. 21
(2) Interface unit (Abbreviation IFU)
Function Description Reference
Position control mode This servo is used as position control servo.
Section 2.7
Section 3.1.2
Section 3.1.5
I/O signal selection
The servo-on (SON
)
, ready (RD
)
and other input signals can be reassigned to
any other pins.
Section 3.2.6
Status display Servo status is shown on the 5-digit, 7-segment LED display
Section 4.2.2
Section 4.3.2
Analog monitor Servo status is output in terms of voltage in real time. Section 5.3.2
(3) Base unit (Abbreviation BU)
Function Description Reference
Regenerative brake option
Used when the built-in regenerative brake resistor of the unit does not have
sufficient regenerative capability for the regenerative power generated.
Section 12.1.1
(4) MR Configurator (servo configuration software)
Function Description Reference
Machine analyzer function Analyzes the frequency characteristic of the mechanical system.
Machine simulation
Can simulate machine motions on a personal computer screen on the basis of the
machine analyzer results.
Gain search function Can simulate machine motions on the basis of the machine analyzer results.
External I/O signal
display
ON/OFF statuses of external I/O signals are shown on the display.
Section 4.3.7
Output signal (DO)
forced output
Output signal can be forced on/off independently of the servo status.
Use this function for output signal wiring check, etc.
Section 4.2.6
Section 4.3.8
Test operation mode JOG operation and positioning operation are possible.