Cylinder Position Calculation
Case:
How is position calculated on a cylinder?
Similar Case:
The cylinder is being moved upon completion in Automate/Auto Inspect.
The cylinder is being moved when adding it to the Report Manager.
Description:
In Report Manager, whether the Cylinder is added from
Measure or captured using Automate/Auto Inspect with an active Alignment, the Cylinder Measurement in
Report Manager will be moved up or down from the center of the Measured
Cylinder to the center of the Nominal Cylinder to support the evaluation of the
Position over the entire Nominal Cylinder Length. Below is an explanation that
will go into the calculation further.
The deviation shown per axis shown in the Report Manager is
the deviation at the center point of the Measured Cylinder. However, the values
shown are not used to calculate the Position of the Cylinder. To correctly calculate the Position per ASME Y 14.5, we must Report the Position
along the Measured Cylinder Vector over the full length of the Nominal
Cylinder. In this case, the Nominal Length of the Cylinder is .1122, which
results in a Position of .0036.

We have created Pierce Points from Cylinder10 over the
Length of the Nominal Cylinder (.1122) and performed an Analysis to show the
deviation matches the Position in the Report Manager.

For example, suppose you change the Nominal Cylinder length
in the Report Manager to .0001. In that case, you will notice the Position
deviation changes to .0030, which matches the results from the True Position
calculation of 2 x SQRT(XVAR2 + YVAR2). This is
because when we Report the Position along the Measured Cylinder Vector over
.0001, the deviation between the Pierce Points and Center Point of Cylinder10
over that length is less than a micron.

We hope you found this information helpful.
If there are any further questions, please call Verisurf Support at 1-888-713-7201
Related Articles
Technical Tip - Verisurf AS9102 Inspection Reporting
TECH TIP – VERISURF AS9102 INSPECTION REPORTING This document is a Verisurf workflow process for creating an AS9102 Rev. B report using the Standard Tutor part and model. DETERMINE INSPECTION REQUIREMENTS Before starting any measurement tasks, review ...
Technical Tip - Reporting Position without a CAD Model
TECH TIP – REPORTING POSITION WITHOUT A CAD MODEL This Tech Tip demonstrates how to configure the Report Manager to report Positional Details of features when no associated CAD entities exist. Measure features to create an Alignment. Measure your ...
Technical Tip - Calculating Cone and Cylinder Intersection
TECH TIP – CALCULATING CONE AND CYLINDER INTERSECTION Measuring a Cone and Cylinder's exact intersection to determine the precise X, Y, Z location where the two features intersect is challenging. Therefore, it is more accurate to calculate the Cone ...
Technical Tip - Utilizing MBD Names in Report Manager
Utilizing MBD Names in Report Manager The Report Manager offers the operator the ability to Report MBD Names; this is useful when MBD Tolerances are being used for Surface Profiles, Line Profiles, and Hole Form and Position. This option is activated ...
Reporting Features
Reporting Features Preliminary – Alignment and measurement of Features have been completed. Verisurf Technical Documentation