YASKAWA E-7-Series SGD7S Product Manual page 7

 Technical Terms Used in This Manual
The following terms are used in this manual.
Term
A Σ-7-Series Rotary Servomotor, Direct Drive Servomotor, or Linear Servomotor.
Servomotor
A generic term used for a Σ-7-Series Rotary Servomotor (SGM7A, SGM7J, or SGM7G) or a
Rotary Servomotor Direct Drive Servomotor (SGMCS or SGMCV).
The descriptions will specify when Direct Drive Servomotors are excluded.
A Σ-7-Series Linear Servomotor (SGLG, SGLF, SGLT, or SGLC).
Linear Servomotor
A Σ-7-Series Σ-7S Servo Amplifier with Analog Voltage/Pulse Train References.
SERVOPACK
The combination of a Servomotor and SERVOPACK.
Servo Drive
A servo control system that includes the combination of a Servo Drive with a host controller
Servo System
and peripheral devices.
servo ON Supplying power to the motor.
servo OFF Not supplying power to the motor.
Shutting OFF the power supply to the motor by shutting OFF the base current to the power
base block (BB)
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.
One of the cables that connect to the main circuit terminals, including the Main Circuit Power
Main Circuit Cable
Supply Cable, Control Power Supply Cable, and Servomotor Main Circuit Cable.
The Engineering Tool for setting up and tuning Servo Drives or a computer in which the Engi-
SigmaWin+
neering Tool is installed.
 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.
Rotary Servomotors
torque
moment of inertia
rotation
forward rotation and reverse rotation
CW and CCW pulse trains
rotary encoder
absolute rotary encoder
incremental rotary encoder
-1
unit: min
unit: N·m
Using This Manual
Linear Servomotors
forward movement and reverse movement
forward and reverse pulse trains
linear encoder
absolute linear encoder
incremental linear encoder
Meaning
force
mass
movement
unit: mm/s
unit: N
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