Difference between revisions of "Scanning on a NEWPORT type table"
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− | == Potential For Outliers At Normal | + | == Potential For Phantom Outliers At Normal (Perpendicular) Reflective Surfaces== |
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<td width=300> | <td width=300> | ||
This is the image of the real-time scanned points in the FARO Laser Line Probe scanner setup screen.<br><br> | This is the image of the real-time scanned points in the FARO Laser Line Probe scanner setup screen.<br><br> | ||
− | Notice that the chamfer that is normal to the laser and the camera is | + | Notice that the chamfer that is normal to the laser and the camera is creating a bubble outlier. The effect is that the camera sees points where there is no object in space. The reason is because of the intensity of the reflection caused by the chamfer. It is overexposing the laser scanner camera in this area.<br><br> |
− | One way to overcome this bubble is to increase the cut plane offset. In this case, the offset was set to 1 inch.<br><br> | + | One way to overcome this bubble is to increase the cut plane offset. In this case, the offset was set to 1 inch- which puts the outliers below the cut plane. You can safely set the office up to 1/2 the diameter.<br><br> |
Another way to overcome this issue is to place a darker surface (a mat or paint) on the table. | Another way to overcome this issue is to place a darker surface (a mat or paint) on the table. | ||
[[image:vtube-laser_closeup_outliers.png|400px]]</td> | [[image:vtube-laser_closeup_outliers.png|400px]]</td> | ||
<td> | <td> | ||
− | [[image:Faro_LLP_Control_Newport_Table.png| | + | [[image:Faro_LLP_Control_Newport_Table.png|800px]] |
</td> | </td> | ||
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+ | See also [[How to Diagnose Inaccurate VTube-LASER Measurements]] | ||
== The Impact on Cylinder Calculations== | == The Impact on Cylinder Calculations== | ||
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− | If VTube | + | If VTube includes these outliers with the OD stripes to calculate the diameter, then often the cylinder fit math will fail to find a centerline - and VTube will ask you to remeasure the straight where the problem is occuring.</td> |
<td> | <td> | ||
[[image:vtube-laser_cylinderfit_error_window.png|500px]] | [[image:vtube-laser_cylinderfit_error_window.png|500px]] |
Latest revision as of 16:32, 1 December 2016
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What is a NEWPORT Table?
The Newport table is a an optical table designed to hold laser lens and mirrors. Some customers use them as similar to a granite surface used to measure tube shapes. |
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Scanning Example
The image on right shows an example of scanning a tube on a Newport table. | |
Potential For Phantom Outliers At Normal (Perpendicular) Reflective Surfaces
See also How to Diagnose Inaccurate VTube-LASER Measurements
The Impact on Cylinder Calculations
If VTube includes these outliers with the OD stripes to calculate the diameter, then often the cylinder fit math will fail to find a centerline - and VTube will ask you to remeasure the straight where the problem is occuring. | |
Other Pages
- Back to the VTube-STEP page
- Back to the VTube-LASER page