Kollmorgen AKD PDMM series, User Manual

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AKD PDMM User Guide | Glossary
Term Description
Interrupt
An interrupt is an asynchronous signal from hardware indicating the need for
attention or a synchronous event in software indicating the need for a change to
another execution stream.
Intime
INtime software combines deterministic, hard real-time control with standard
Windows operating systems (including Windows XP, Windows XP Embed-
ded, Windows 2000 and Windows Server 2003) without requiring additional
hardware. Intime was designed specifically to take advantage of the powerful
capabilities of the x86 processor architecture. Therefore, you’re real-time and
non real-time applications run in separate virtual machines on a single com-
puter, for cost-effective, reliable control that is easy to develop and maintain.
Jerk
In physics, jerk, is the rate of change of acceleration; more precisely, the deriv-
ative of acceleration with respect to time
Lead error
The deviation of a leadscrew from its nominal pitch. The error is often mon-
otonic (linear), although periodic error and thermal expansion set limits to its
predictability.
Limit switch
A sensor, typically Hall-effect, optical, eddy current, or mechanical, which is
used to sense the end of travel of a linear motion assembly. In addition to pre-
venting overtravel, it is frequently used to establish a precision reference.
Mechanical
angle
Mechanical angle of the feedback (always between 0°…360°)
Mechanical
angle
Mechanical angle of the feedback, always between 0° and 360°.
Microstepping
A technique which, instead of switching phase currents in a stepping motor on
and off, sinusoidally varies the current in the two windings. This effectively
increases the resolution from 200 steps per revolution to 2,000 (
~
10) or 10,000
(
~
50) micro-steps per revolution.
Modbus
Modbus is a serial communications protocol and is now the most commonly
available means of connecting industrial electronic devices.
Modbus is often used to connect a supervisory computer with a remote ter-
minal unit in supervisory control and data acquisition (SCADA) systems.
Versions of the Modbus protocol exist for serial port and Ethernet (it is widely
used with TCP/IP over Ethernet)
Motion control
Motion control is a sub-field of automation, in which the position and/or velocity
of machines are controlled using some type of device such as a hydraulic
pump, linear actuator, or an electric motor, generally a servo. Motion control is
an important part of robotics and CNC machine tools, however it is more com-
plex than in the use of specialized machines, where the kinematics are usually
simpler. The latter is often called General Motion Control (GMC). Motion con-
trol is widely used in the packaging, printing, textile and assembly industries
Motor Con-
tinuous Stall
Current
The amount of current applied to a motor when the rotor is locked and results in
the rated rated temperature rise.
Motor Peak
Current Peak current or amps peak is the highest current that can flow through the
motor or amps peak = 1.41 X amps/phase (or amps RMS).
Nonvolatile
Information is stored in a specific memory to remain accessible even when the
application has been powered off. The memory type is called NV (Non-Volatile
Memory) also NVS (Non Volatile Storage).
Nut stiffness
The stiffness of a leadscrew/nut assembly, typically measured in Newtons per
meter (N/m). This stiffness, together with the moving mass and duplex bearing
stiffness, sets the primary natural frequency of a leadscrew-driven stage.
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