YASKAWA SERVOPACK Sigma 7W Series Product Manual page 13

 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
 Notation Used in this Manual
 Notation for Reverse Signals
The names of reverse signals (i.e., ones that are valid when low) are written with a forward slash (/)
before the signal abbreviation.
Notation Example
BK is written as /BK.
 Trademarks
• QR code is a trademark of Denso Wave Inc.
• MECHATROLINK is a trademark of the MECHATROLINK Members Association.
• DeviceNet is a registered trademark of the ODVA (Open DeviceNet Venders Association).
• PROFIBUS is a trademark of the PROFIBUS User Organization.
• Ethernet is a registered trademark of the Xerox Corporation.
• Other product names and company names are the trademarks or registered trademarks of the
respective company. "TM" and the ® mark do not appear with product or company names in this
manual.
 Visual Aids
The following aids are used to indicate certain types of information for easier reference.
Indicates precautions or restrictions that must be observed.
Also indicates alarm displays and other precautions that will not result in machine damage.
Important
Indicates definitions of difficult terms or terms that have not been previously explained in this manual.
Term
Indicates operating or setting examples.
Example
Indicates supplemental information to deepen understanding or useful information.
Information
Linear Servomotors
force
mass
movement
forward movement and reverse movement
forward and reverse pulse trains
linear encoder
absolute linear encoder
incremental linear encoder
unit: mm/s
unit: N
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