- The scan will stop after the probe crosses the plane at the end point the given number of times.

- The scan will stop after the probe crosses (breaks) the sphere at the end point the given number of times. The sphere is located at the End Point but offset from the surface by a probe radius along the approach vector so that the center of ball will pass through the sphere.

- The scan will stop after the probe crosses (breaks) the cylinder at the end point the given number of times. The cylinder is unbounded (i.e. is considered infinite in length). The cylinder is located at the End Point but offset from the surface by a probe radius along the approach vector so that the center of ball will pass through the cylinder.

- The scan would stop after the probe crosses (breaks) the cone at the end point the given number of times. The cone is unbounded (i.e. is considered infinite in length).

Current Help System: PC-DMIS CMM (View Core Help)

### Common Measurement Strategy Properties

The subtopics listed below describe commonly used properties available to many of the measurement strategies.

Properties | Measurement Strategies Using this Property | Description
Point Density | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy PlaneCircleScanStrategy CylinderConcentricCircleScanStrategy CylinderSpiralScanStrategy
CylindricalAxisScanStrategy
ConeLineScanStrategy
ConeSpiralScanStrategy
LinearOpenScanStrategy
SphereConcentricScanStrategy
SphereLineScanStrategy
SphereSpiralScanStrategy

This defines number of readings to take per millimeter of measurement during a scan.

Scan Speed | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy PlaneCircleScanStrategy CylinderConcentricCircleScanStrategy CylinderSpiralScanStrategy
CylindricalAxisScanStrategy
ConeLineScanStrategy
ConeSpiralScanStrategy
LinearOpenScanStrategy
SphereConcentricScanStrategy
SphereLineScanStrategy
SphereSpiralScanStrategy

This defines the percentage of the maximum machine speed.

Number of Lines | CylindricalAxisScanStrategy ConeLineScanStrategy SphereLineScanStrategy | This defines the number of lines to scan.
Number of Circles | CylinderConcentricCircleScanStrategy | This defines the number of concentric circles to scan.
Number of Rings | ConeConcentricScanStrategy SphereConcentricScanStrategy | This defines the number of concentric circles to scan.
Depth | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy ConeSpiralScanStrategy |
Pitch | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy ConeSpiralScanStrategy | This defines the distance between threads along the axis of the feature. This allows your scan to move in a spiral-like fashion along the feature.
Auto Move | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy |
Clearance Plane | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy |
Use HSSDAT | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy | If you select this check box, PC-DMIS sends a distinct set of points defining the feature measurement path to the controller. If you don't select this check box, PC-DMIS will send the feature specific parameters to the controller.
Override Global Scan Speed | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy PlaneCircleScanStrategy CylinderConcentricCircleScanStrategy CylinderSpiralScanStrategy
CylindricalAxisScanStrategy
ConeLineScanStrategy
ConeSpiralScanStrategy
LinearOpenScanStrategy
SphereConcentricScanStrategy
SphereLineScanStrategy
SphereSpiralScanStrategy

Marking this check box enables the Scan Speed box, allowing you to change the global scan speed for this measurement.

Filtering | CircleAnalogOverlappingScanStrategy CircleAnalogScanStrategy PlaneCircleScanStrategy CylinderConcentricCircleScanStrategy CylinderSpiralScanStrategy
CylindricalAxisScanStrategy
ConeConcentricScanStrategy
ConeLineScanStrategy

The Filtering area filters data from the scan. Some filtering options are specific to certain strategies.

Outlier Elimination:

- None – No outliers are removed.

- 3 Sigma - Outliers beyond three standard deviations are removed.

Filter Type:

- None – No filter type applied to the scan data set.

- Gauss – A Gauss filter is applied to the scan data set.

- Cylinder – A Cylindrical filter is applied to the scan data set.

UPR: Undulations / Revolutions. Polar filter with typical values of 15, 50, 150 and 500.

Cutoff Wavelength: This value determines the wavelength of the oscillations in the data below which the amplitudes of the oscillations will be reduced when applying a linear Gaussian filter.

Outlier Tolerance: This box defines the tolerance value used to eliminate outliers.

Boundary | CircleAnalogOverlappingScanStrategy PlaneCircleScanStrategy CylinderConcentricCircleScanStrategy CylindricalAxisScanStrategy LinearOpenScanStrategy | The Boundary area creates an imaginary feature that acts as a boundary around a scan's end point. By default, this feature is a plane at the end point that when crossed one time, stops the scan. However, you can define the end boundary type to be a different type of feature.

Plane

Sphere

Cylinder

Cone

Crossings: The Crossings box determines how many times a scan crosses the selected boundary type before stopping the scan. For example, if you specify that the number of crossings is two, the scan will stop once the probe's ball center crosses the given condition’s surface (planar, spherical, cylindrical, conical etc.) two times.

Radius: The Radius box appears when you select either Sphere or Cylinder as your boundary type. It defines the radius of that boundary feature.

Number of Revolutions or Revolutions | CylinderSpiralScanStrategy ConeSpiralScanStrategy SphereSpiralScanStrategy | This number defines how many complete revolutions the scan will make as it spirals around the cylinder.
Points Per Rev | ConeSpiralScanStrategy | This number defines the number of points to collect per revolution or spiral.
Clearance Distance | CylinderSpiralScanStrategy CylindricalAxisScanStrategy |
MaxTipDia Allowed | ConeSpiralScanStrategy |
Form | SphereSpiralScanStrategy |
Size | SphereSpiralScanStrategy |
Location | SphereSpiralScanStrategy |