NSK EDD Megatorque Motor - Terminology

1. Introduction
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1.2. Terminology
 It is necessary to be familiar with some terms used in this document.
 Cable Set -------------- A cable set exclusive use for the Megatorque Motor System. Connects driver Unit
and Megatorque Motor
 CCW ------------------- Counterclockwise; direction of Motor rotation. Seen from the top of rotor.
 closed ------------------ Logic output state; output current will flow.
 count/rev. -------------- Count/revolution. A unit of resolution. In some cases, it is described as pulse/rev. in
this manual.
 CW --------------------- Clockwise; direction of Motor rotation. Seen from the top of rotor.
 Driver Unit ------------ Means Megatorque Motor System’s driver unit when capitalized.
 Handy Terminal ------ Means an optional handy terminal (FHT31) for RS-232C communication used for
parameter settings and programming, etc. Exclusive use for Megatorque Motor
System. .
 LO ---------------------- A parameter to set a load inertia moment to the Motor. Unit is in [kg•m
2
].
 Motor ------------------ Means Megatorque Motor System’s motor when capitalized.
 velocity gain (VG) --- Shorter name for velocity loop proportional gain.
The velocity error, the deviation of velocity feedback from the velocity command,
will be amplified by a number defined as a velocity gain set by the parameter VG,
and will be output as a torque command.
+ (plus) direction The direction in which the position data inside the Driver Unit counts up.
- (minus) direction The direction in which the position data inside the Driver Unit counts down.
 The following commands are used for the Driver Unit to set function and to execute operation.
 Command -------------- Execution instruction to the Driver Unit. It includes the command RUN to start
positioning operation and stop commands to stop positioning operation.
 Parameter -------------- The parameters hold the operational settings of internal function of the Driver Unit.
Changing of these settings enables to move the Motor as planed
 Global parameter-----A parameter set to a command line in program channels. This term is used
to distinguish them from local parameters. It is stored in a non-volatile memory.
 Local parameter------A parameter that is temporarily becomes effective in a program operation.
It is not stored to a non-volatile memory.
 Monitor ---------------- A monitor can output data showing the internal state of the Driver Unit, such as
Motor velocity and position scale data. You can monitor them anytime.