Belt drives
can be oriented in any direction and thereby require a directional convention.
The convention shown here has been adopted for some very simple reasons
which help illustrate not only its usefulness but the importance of conventions
in general:
-
Reason #1:
The belt (reaction) forces are usually directed in-line (parallel) with
the belts.
-
Reason #2:In
order to capture these belt related vibrations
and separate closely
matched frequencies, higher resolution readings are set up in the database
parallel to the belts. Details of this subject - spectrum resolution -
are covered in the "Spectrum" section.
-
Reason #3:
To make it easier to both set up the database and to analyze collected
data, these higher resolution readings are always taken horizontally.
For these reasons,
a convention is used that defines "parallel to the belts" as horizontal
is used. By default, that leaves the measurement taken perpendicular to
the belts defined as Vertical.
By
adopting this convention, both collection and analysis are simplified -
a stated objective of using conventions. |
