Kollmorgen AKD PDMM series, User Manual

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AKD PDMM User Guide | Glossary
Term Description
Blackfin
Blackfin refers to a family of 16/32-bit microprocessors with built-in Digital Sig-
nal Processor (DSP) functionality, which is traditionally only accompanied by a
small and power-efficient microcontroller. The result is a low-power, unified
processor architecture that can run operating systems while simultaneously
handling complex numeric tasks such as real time H.264 video encoding.
Brake
Applied or
Released The two states of the braking system.
A device for slowing or stopping the motion of amotor, or alternatively a device
to restrain it from starting to move again.
Brushless ser-
vomotor
An "inside-out" DC motor, with a permanent magnet rotor, and electrical coils
in the stator. Commutation of current in the windings is typically achieved via
external switching transistors, and Hall-effect detectors. This avoids the lim-
ited life of brushes and their radiated EMI.
Busy/Free
AKD PDMM support only one connection at a time. If a connection is in use,
then the drive is “busy.” If the connection is not use, then the drive is “free.”
CAM profiling
The position of a slave axis is mathematically linked to the position of a master
axis. A good example of this would be in a system where two rotating drums
turn at a given ration to each other. A more advanced case of electronic gearing
is electronic camming. With electronic camming, a slave axis follows a profile
that is a function of the master position. This profile need not be linear, but it
must be a mathematical function.
CANopen
CANopen is a communication protocol and device profile specification for
embedded systems used in automation for fieldbuses working in real-time
Cantilevered
load Any load not symmetrically mounted on a stage. Such loads exert torque
moments upon the ways, and the resulting deformations can degrade accuracy
Caret
The term caret is also sometimes used in graphical user interface terminology
where it means a text insertion point indicator, frequently represented by a
blinking vertical bar. In this context, it may be used interchangeably with the
word
cursor , although the latter term is often reserved for a mouse pointer
Casting see Typecasting item
Closed loop
positioning The use of feedback devices (encoders, resolvers, interferometers, etc.) to
allow a motor to position a user payload accurately.
CmdGain Sets the command gain for the command input.
CmdOffset Sets the command offset for the command input.
CmdSrc Selects Analog, PWM, or Command variable for command.
Coefficient of
friction
This is defined as the ratio of the force required to move a given load to the mag-
nitude of that load. Typical values for ball and crossed roller slides are 0.001 to
0.005.
COM
COM is the original name of the serial port interface. It might not only refer to
physical ports, but also to virtual ports, such as ports created by Bluetooth or
USB-to-Serial adapters.
Contactor
A contactor is an electrically controlled switch (relay) used for switching a
power circuit. A contactor is activated by a control input which is a lower volt-
age / current than that which the contactor is switching. Unlike a circuit breaker
a contractor is not intended to interrupt a short circuit current.
Custom
Refers to user modified or defined material (such as custom units or custom
settings)
DeviceNet
DeviceNet is a communication protocol (based on Controller Area Network)
used in the automation industry to interconnect control devices for data
exchange. Typical applications as listed: information exchange, safety
devices, and large I/O control networks
499 Kollmorgen™ | December 2012