### Corner (Inside)

To create a Corner (Inside) command:

1. Select the Measure soft key from the main screen's Navigation Bar.

2. Select the Corner (Inside) soft key from the Navigation Bar. The Measure Corner (Inside) screen appears.

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:

- Nominal (XYZ Nominal) - Defines the nominal position of the corner.

- Start Angle - Defines the angle of the starting side of the corner. This is the side's direction in relation to the primary axis. The primary axis is X in the XY work face, Y in the YZ work face, and Z in the ZX work face.

- Included Angle - Defines the angle between both sides of the corner.

- 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):

- Start Side Offsets - These are the distances of the first and second points respectively from the corner nominal location along the first side which is located at the start angle direction.

- End Side Offsets - These are the distances of the first and second points respectively from the corner nominal location along the second side.

- First Side to Second Side is Clockwise - By default, NC Gage expects that the second side is located counterclockwise from the first. Selecting this option identifies that the second side is located clockwise with respect to the first.

Available Navigation Bar Soft Keys on this Screen:

| Backward / Forward Back / Forward to previous / next group of soft keys. |  | Select Measurement Face This soft key determines the direction of probing and the location of the clearance moves for the feature. You can press this multiple times to choose a different measurement face. Available faces are: X+, X-, Y+, Y-, Z+ and Z-.
| Return to Previous Step This will remove the last learned probe positions. |  | Read Probe Position and Continue with Next Step This soft key reads the current probe position and then advances to the next step in the procedure.
|  |  | Delete Current Command / Delete Last Created This soft key deletes the current selected command (or the last created command) from the part program. If this icon is disabled, you may need to delete commands using the Edit Program screen instead.
| Learning and Creating a Command This will only be available after all the necessary probe positions to identify the feature location have been learned. It will cause the machine to measure the feature. |  | Cancel All Steps / Abort This soft key stops and resets the current operation. If learning a feature, it removes all the learned probe positions.
| Execute This soft key causes the machine to measure the feature. It will only be available after all the necessary probe positions to identify the feature location have been learned (or typed in). It lets you make changes and test run the feature before committing the feature to the program. |  | Return This soft key returns the view up one level to the previous screen.
| Tolerance Settings This soft key lets you set or modify feature nominal and tolerance values used by the feature command. It is an overview of what will show up in the report screen. |  | Insert Move Point This will read the current position of the probe and insert that as a clearance move into the program.
| Confirm / Add Command For operations this confirms the selection. For commands, this will append the command to the end of the program. For feature commands, this will become available after the machine has learned the feature location or when you have typed the feature's nominal values.
For constructed and dimension feature commands, this will become available once you have specified the proper input features.

Help

This soft key accesses the NC Gage help file.

Learn Process:

1. Position the probe next to first point on the first side of the corner and press Read Position .

2. Position the probe next to second point on the first side of the corner and press Read Position .

3. Position the probe next to first point on the second side of the corner and press Read Position .

4. Position the probe next to second point on the second side of the corner and press Read Position .

5. Position the probe for automatic measurement and Select Learning and Creating a Command . NC Gage automatically takes hits in a similar fashion as depicted below.

Inside Corner Path: A-E) jog positions 1-5) automatically measured point positions. Red lines show the measuring path.

6. Once the feature has been measured, the measured values are updated.

7. Press Confirm and Append Current Command to End . The feature command is added to the part program.

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

Learn Inside Corner Feature Path

- Read position of probe next to first point of first side of corner. All measurements will be taken at level of this point.

- Read position of probe next to second point of first side of corner.

- Read position of probe next to first point of second side of corner.

- Read position of probe next to second point of second side of corner.

- Determine first and second direction vectors and normal vectors.

- Compensate points.

- Determine approximate corner point.

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

- Position probe to point above first read point position.

- Drop to measurement height

- Measure toward first side surface, search distance is 4* prehit distance.

- Position probe approximately to second read point.

- Measure toward first side surface, search distance is 4* prehit distance.

- Position probe approximately to third read point.

- Measure toward second side surface, search distance is 4* prehit distance.

- Position probe approximately to fourth read point.

- Measure toward second side surface, search distance is 4* prehit distance.

- Move to clearance plane height.

Execute Inside Corner Feature Path

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

- Position probe to point above first prehit point position.

- Drop to measurement height

- Measure toward first side surface, search distance is 2* prehit distance.

- Position probe approximately to second read point.

- Measure toward first side surface, search distance is 2* prehit distance.

- Position probe approximately to third read point.

- Measure toward second side surface, search distance is 2* prehit distance.

- Position probe approximately to fourth read point.

- Measure toward second side surface, search distance is 2* prehit distance.

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

- Move to clearance plane height.