Shaft Centerline Viewer

NI InsightCM™ 3.3 Help

Edition Date: December 2018

Part Number: 374498G-01

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Parent Topic: Available Viewers

Supported Sensors: Gap features from two displacement sensors connected to orthogonal probes.

Note   The actual angle between orthogonal probes does not need to be exactly 90 degrees. Angles of 80-100 degrees are typically acceptable.

The Shaft Centerline viewer plots the average radial shaft position to show changes in shaft position during a run-up or coast-down in relation to the surrounding, fixed bearing. To indicate the distance from the center point of the bearing, the viewer contains a dashed line that begins at the zero point of the axis system and ends at a point of the curve where the viewer cursor lies.

What do you want to do?

Task Action
Display the bearing-clearance circle. Click Settings on the viewer toolbar and place a checkmark in the Show bearing clearance checkbox.
Set the bearing start position of the shaft. On the Asset Configuration page, select the sensor you want to set the bearing start position for and click the Properties tab. The Bearing Start Configuration field is under the Displacement Properties section.
Change the rotation direction of the tachometer. On the Properties tab of the Asset Configuration page, set the Rotation Direction as either clockwise or counterclockwise.
Compensate for DC gap offset when displaying the shaft position. To set the gap reference, or DC offset, of the shaft centerline curve to compensate for the resting point of the shaft, configure the Gap Voltage Reference sensor property on the Properties tab of the Asset Configuration page. The gap reference is a property of the sensors that acquire data.
Tip  If you notice that the configured gap value is incorrect or you want to temporarily use a different value, you can override the gap property with a value that is calculated from sensor data.

Related link: Compensating for DC Gap Offset
Select the source sensor. If you have more than one feature selected in the asset tree, you can select the source sensor for the viewer by clicking Choose Assets on the viewer toolbar.
Disable auto-scaling to manually set the scale for the viewer. Click Set Scale on the viewer toolbar. Uncheck Auto-scale and set the maximum and minimum values you want the viewer to use.

Related Information

Adding, Changing, and Removing Viewers

Properties Tab on Asset Configuration Page


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