xi
Using this Manual
Technical Terms Used in This Manual
The following terms are used in this manual.
Differences in Terms for Rotary Servomotors and Linear Servomotors
There are differences in the terms that are used for Rotary Servomotors and Linear Servomotors.
This manual primarily describes Rotary Servomotors. If you are using a Linear Servomotor, you
need to interpret the terms as given in the following table.
Term
Meaning
Servomotor
Α Σ
-7-Series Rotary Servomotor, Direct Drive Servomotor, or Linear Servomotor.
Rotary Servomotor
A generic term used for a
Σ
-7-Series Rotary Servomotor (SGMMV, SGM7J, SGM7A, SGM7P,
or SGM7G) or a Direct Drive Servomotor (SGM7E, SGM7F, SGMCV or SGMCS).
The descriptions will specify when Direct Drive Servomotors are excluded.
Linear Servomotor
A generic term used for a
Σ
-7-Series Linear Servomotor (SGLG, SGLF, or SGLT).
SERVOPACK
A
Σ
-7-Series
Σ
-7C Servo Amplifier.
Servo Drive
The combination of a Servomotor and SERVOPACK.
Servo System
A servo control system that includes the combination of a Servo Drive with a host controller
and peripheral devices.
servo ON
Supplying power to the motor.
servo OFF
Not supplying power to the motor.
base block (BB)
Shutting OFF the power supply to the motor by shutting OFF the base current to the power
transistor in the SERVOPACK.
servo lock
A state in which the motor is stopped and is in a position loop with a position reference of 0.
Main Circuit Cable
One of the cables that connect to the main circuit terminals, including the Main Circuit Power
Supply Cable, Control Power Supply Cable, and Servomotor Main Circuit Cable.
S
The Engineering Tool for setting up and tuning Servo Drives or a computer in which the Engi-
neering Tool is installed.
MPE720
The Engineering Tool or a personal computer running the Engineering Tool
PLC
A Programmable Logic Controller.
Servo Section
The part of a
Σ
-7C SERVOPACK that provides servo functionality.
Controller Section
The part of a
Σ
-7C SERVOPACK that provides controller functionality.
CPU
The CPU built into the Controller Section of a
Σ
-7C SERVOPACK.
Motion Control
Function Module
The SVD, SVC4, or SVR4 Function Modules in the Controller Section of the SERVOPACK.
SVD
A Motion Control Function Module for the two axes of a
Σ
-7C SERVOPACK that connects to
the Controller Section and Servo Section of the
Σ
-7C SERVOPACK through a bus.
SVC4
A Motion Control Function Module that uses MECHATROLINK-III communications to commu-
nicate with MECHATROLINK-III slave devices.
Communications
Function Module
The Function Module in the 218IFD built into the CPU.
Rotary Servomotors
Linear Servomotors
torque
force
moment of inertia
mass
rotation
movement
forward rotation and reverse rotation
forward movement and reverse movement
CW and CCW pulse trains
forward and reverse pulse trains
rotary encoder
linear encoder
absolute rotary encoder
absolute linear encoder
incremental rotary encoder
incremental linear encoder
unit: min
-1
unit: mm/s
unit: N
m
unit: N
