### Web

To create a Web command:

1. Press the Measure soft key from the Main screen's Navigation Bar.

2. Press the Web soft key to display the Measure Web screen.

3. Follow the instructions on the screen to insert the command. Pay attention to the graphical description in the upper left section of the screen. It will show you where to position the probe for measurements and changes when multiple steps are required.

Parameters Definition:

- Center (XYZ Nominal) - Defines the nominal position of the top surface center of the web.

- Vector Angle - Defines the vector angle of the center line of the web.

- Width (Nominal) - Defines the nominal width of the web.

- Prehit Distance - Defines the distance away from the nominal surface at which the probe will start seeking the surface during measure.

Optional Settings:

- Hit Clearance Plane - Selecting this option causes the probe to move to a clearance plane between each hit of the feature. The edit box to the right will allow the user to enter the distance to the plane. This plane is not the program clearance plane.

- Learn Then Measure - Selecting this option causes the machine to learn the location of the part using default parameters and then immediately re-measure the feature with the properties as set on the screen. This will allow the user to test all the set parameters and should warrant a more accurate and reliable first article inspection.

- Learn Using Values on Screen - This allows the user to enter the nominal values of the feature and have the software measure at that location. Selecting this option displays additional properties that are described in the Properties section.

Properties (Only visible with Learn Using Values on Screen selected):

- Front Side Length – This will be the distance from the first point to the second.

- Second Side Length – This will be the distance from the start point, if it were projected to the second side, to the point on the second side.

Available Navigation Bar Soft Keys on this Screen:

Learn Process:

1. Position probe next to first point on first side and press the Read Probe Position soft key . The distance away from the work face surface will be the same on all the points.

2. Position probe next to second point on first side and press the Read Probe Position soft key .

3. Position probe next to point on second side and press the Read Probe Position soft key .

4. Press the Learning and Creating a Command soft key . NC Gage will move to the clearance plane and automatically takes hits in a similar fashion as depicted below.

A-C) Jog positions 1-3) automatically measured point positions. Red lines show the measuring path.

5. Press the Confirm and Append Current Command to End soft key . The feature command is added to the part program. Press the Return soft key to return to the previous screen without saving

The following is the specific feature path and logic built into NC Gage:

Learn Web Feature Path

- Read position of probe next to first point of first side of web, Z value will be measurement height of all points

- Read position of probe next to second point of first side of web, direction from first point to second point will define the direction vector of the web. This point determines approximate measurement location of 2nd point.

- Read position of probe next to a point on the second side of web, distance from this point to the line defined by the first two points defines approximate width of the web. This point determines approximate measurement location of 3rd point.

- If probe is left below clearance plane height, move up to clearance plane height.

- Move to position above first read point.

- Drop to measurement height.

- Measure point, target is projection of first point onto web center line.

- Retract and move to second read point position.

- Measure point, target is projection of second point onto web center line.

- Retract and move up to clearance plane height.

- Move to point above third read point.

- Drop to measurement height

- Measure point, target is projection of third point onto web center line.

- Retract and move up to clearance plane height.

Execute Web Feature Path

- If probe is below clearance plane height, move up to clearance plane height.

- Move to position above first prehit point.

- Drop to measurement height.

- Measure point, target is projection of first point onto web center line.

- Retract and move to second prehit point position.

- Measure point, target is projection of second point onto web center line.

- Retract and move up to clearance plane height.

- Move to point above third prehit point.

- Drop to measurement height

- Measure point, target is projection of third point onto web center line.

- If local clearance plane is enabled move to the local clearance plane between each point to get to next prehit point.

- Retract and move up to clearance plane height.