#### Target Plot

The Target Chart Option dialog box lets you select configurations for both the Individual Target and Group Target charts.

To access this dialog box, click on the Chart Options icon on the Charts tab. Then under the Chart Display menu, select Target Plot.

Target Chart Option dialog box

Using this dialog box you can do the following:

- Select one of three available tolerancing options

- Select the reference plane for the plot

- Set a subgroup size to plot the average positions of a subgroup rather than individual points

- Set the number of specification limits that will appear on the plot (1-6)

- Enter axis and data labels

- For true position tolerancing, select the means of expression for the true position tolerance value: either RADIUS or DIAMETER.

The following table provides information about the different items on the dialog box.

Dialog Box Item | Description
Reference plane | Use this field to specify the two positional axes that will used to define the reference plane of the plot. Valid values are: XY, -XY, XZ, -XZ, YZ, -YZ, YX, -YX, ZX, -ZX, ZY, -ZY Any other value is considered a bad value, and the software will automatically set it to the correct reference plane based on the feature's vector. If this is a bad value and a vector does not exist, the software cannot properly generate the target plot.
Subgroup Size | For Individual Target Plots, set this value to zero or one to plot the positions of individual points, or, if you wish to plot the average position of a subgroup, enter the subgroup size. If you are configuring a Group Target Plot, this field is ignored; subgroups are not used for Group Target Plots.
Target Diameter | This field sets the number of specification limits that will appear on the target plot. You can select to show up to six specification limits, which are drawn as additional circles (or ellipses or rectangles, depending upon the tolerancing configuration) around the target center. The radius of each outer circle, ellipse or rectangle is incremented by one tolerance value. The deviations of the measured values are then plotted and labeled with letters, and the centroid of the measured points also is calculated and shown as the intersection point of two dashed lines.

Set this field to AUTO to show all points and the optimum number of tolerance zones as determined by the data.

Target Units | This field applies only to true position tolerancing. It specifies the method used to express true position tolerance. You can select to express the tolerance in terms of either diameter or radius. The plot’s summary section above the graphical chart will display the value as either RADIUS = or DIAMETER = , depending upon your choice here.

Note: Regardless of your choice here, the true position tolerance is stored in the database and input in the default tolerance as a DIAMETER.

Axes Labels: | Enter the labels that will mark the major and minor axes on the plot, or leave this field blank if you do not want axis labels to appear on the plot.
Tolerance Type: | Datapage+ offers three tolerancing options for Target Plots: True Position, Elliptical, and Rectangular. Use this field to select the tolerancing type for the current plot and/or to set the default tolerance values that will be used for each tolerancing type when the .T variable or upper tolerances do not exist in the database. See the tolerancing types topics here for complete explanations of the data requirements and resulting displays of each:

- True Position Tolerancing

- Elliptical Tolerancing

- Rectangular Tolerancing

Important: True Position Tolerancing is the default tolerance for the first Target Plot you create. You can change the tolerancing option through this dialog box after you have created a Target Plot. If you are creating your first Target Plot and the T. variable required for True Position Tolerancing does not exist in the database, you can just create the plot anyway (it will display “No Valid Data”), and set your configuration later, or you can rename the .T variable, and then create the plot.

Data Label | Use this field to enter the name of a trace field that will be used to identify transactions, rather than the date and time stamps usually employed as transaction labels. Select TRANSACTION in this field to use dates and times to identify transactions.
Default, Save, Close, Apply |

See also:

- Target Individual Chart

- Target Group Chart