Working with Measurement Strategies

You can use measurement strategies for specific Auto Features to select predefined schemes that change the way that PC-DMIS measures those features. The measurement strategies are grouped as follows:

• Default PC-DMIS Measurement Strategy - This strategy is the default touch point strategy. It is available for all Auto Features.

• Adaptive scanning strategies - The names of these strategies start with "Adaptive". When you execute a measurement routine, these strategies refer to the database to determine the scanning parameters.

• Non-adaptive scanning strategies - These strategies (Gage Scan Calibration, Cylinder Centering Thread Scan, and Self Centering Point) do not need to refer to the database to determine the scanning parameters.

• TTP strategies - The names of these strategies start with "TTP". These strategies use touch trigger probes to measure a feature.

For best results for all measurement strategies, the PC-DMIS Settings Editor should have VHSS enabled.

You can also use the Measurement Strategy Editor (MSE) functionality to modify certain strategies. With the MSE, you can modify and store custom strategies at a feature level. In addition, you can modify and store groups of settings for all the auto features. For more information on the MSE, see "Using the Measurement Strategy Editor" in the PC-DMIS Core documentation.

To select a measurement strategy, do the following:

1. From the Probe Toolbox, select the Measurement Strategies tab (). Initially, PC-DMIS shows the Default PC-DMIS Measurement Strategy.

2. Click the drop-down arrow and then select the measurement strategy that you want to use. The Probe Toolbox tabs change to show only the tabs that apply to that strategy. For example, an Adaptive Circle Scan (available to scanning probes) strategy looks like this:

Sample Probe Toolbox tabs

3. Complete the properties on the measurement strategy's tabs (Setup, Advanced, Filters and so on) with all known information about the strategy.

1. • To complete the properties for an adaptive scanning strategy, see "Using Adaptive Scanning Strategies".

   • To complete the properties for a non-adaptive strategy, see "Using Non-Adaptive Scanning Strategies".

   • To complete the properties for a TTP strategy, see "Using TTP Strategies".

4. To test the feature, click Test.

1. • For the Default PC-DMIS Measurement Strategy, PC-DMIS measures the feature according to the settings that you specified in the Auto Feature dialog box.

   • For an adaptive scanning measurement strategy, PC-DMIS scans the feature according to the parameters that you specified on the strategy's tabs.

   • For a non-adaptive scanning strategy, PC-DMIS measures the feature according to the settings that you specified on the strategy's tabs.

   • For a TTP strategy, PC-DMIS measures the feature with touch points according to the settings that you specified on the strategy’s tabs.

5. Click Create. If the Measure Now button () in the Feature properties area is selected, the probe moves according to the settings specified on the Advanced tab using the auto feature's properties for feature location and other characteristics.

More:

Measuring Features: Introduction