Inscribed/Circumscribed Circle Reporting
	7.01.155 Geomet 101, 101+, 301, 501            Definition   The Maximum Inscribed / Minimum Circumscribed Circle function evaluates the data points captured during the measurement of a circle and locates one possible solution to solve the following rules: The Maximum Inscribed Circle is best used to illustrate a gage pin being inserted into a bore. The gage pin, when sized to the largest pin available to fit in the bore, will contact three or more captured data points and contains no data points within the solution. The Minimum Circumscribed solution is best suited for use on outside features such as a boss or stud. This feature is best illustrated when using a ring gage to measure an outside diameter. The solution is the smallest possible ring gage that will fit over the outside diameter. The ring gage will contact the diameter at the three or more points and contain all data points within the group. In both cases, reported location may shift as a result of the new calculated solution based on using a subset of the original data point group.   Activating the Inscribed/Circumscribed Circle Function   The Inscribed/Circumscribed calculation is a post measurement tool. Select a circle in the inspection report by highlighting it with a left-click. Activate the feature sub-menu by using the right-click method. In  the menu select "Min/Max Inscribed Setup".   Inscribed/Circumscribed Circle Setup Tool   The setup tool will automatically configure itself based on the selected circle characteristics. Under most conditions you will not have to change these basic setup. The number of data points used in the measurement will influence the reported solution. The algorithm tests every possible combination to ensure an accurate solution but with hundreds of points, the calculation will take extended time. To reduce the combinations, the setup tool provides a filter to reduce the number of point combinations. When the data point group is numbered in the hundreds, we suggest using the filter. The range of the filter is 1 - 100 which represent a percentage where 10 equals 10%. A 10% of 360° is 36°. Only a single point within that 36° slice would be used in the calculation. Use the Update Estimate button to see how many points will be included in the calculation.   Calculating the solution   Once the setup has been concluded, press the corresponding button to report the size and location.   Editing an existing solution   Follow the highlighting process to activate the Inscribed/Circumscribed Circle Setup Tool. When displayed the tool populates with the current settings. Change the setting, such as the filter, and recalculate the solution.     Interpreting the Graphic Display   The CAD Graphics provides additional information to better understand the reported solution. The original Circle feature will now display the new size, locations and data points used in the final calculation. Zoom in around the center and you will see a shift in reported location.   Application of the solution   All subsequent constructions that involve position or size will now use the calculated solution and not the original fitted circle. Setting the PCS Origin, constructing features, reporting distances etc. will utilize these new values.     Remove a Inscribed/Circumscribed Circle solution   Should you want to remove the calculated solution, select the "Remove Existing..." button from the setup tool. NOTE: The remove option will be disabled when there are dependent features such as PCS components, distance etc. using the solution.   Tip:   To preserve the original Circle feature within the report, use the Recall function to create a copy of the Circle. Apply the Inscribed/Circumscribed Circle function on the recalled feature. It would also be helpful if you are looking for the difference between reported locations.     Function limitations:   Calculation such as the Inscribed/Circumscribed Circle rely on a proper distribution of data points. Spreading your data point fully around the feature covering close to 360° offers the best chance of reporting a consistent result. Data point captured on less than 180° will not produce repeatable and sound solutions. Using the example of a bore machined into the edge of a block and has only 175° surface area, you can find many possible gage pin solutions that produces a result. Which minimum points used in the calculation could result in several solution, none of which will be accurate.