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To begin, open the Update CNC Tool Offset dialog box (Operations | CNC Programming | Update Tool Offset).

Update CNC Tool Offset Dialog Box

The Length value and Diameter value boxes are typically filled in from the Expression Builder dialog box. Type the tool number and click OK to create the Update Tool Offset feature in the measurement routine.

For details on creating expressions with the Expression Builder dialog box, see the "Using Expressions and Variables" chapter in the PC-DMIS Core documentation.

In Command mode (View | Command Mode), navigate to the Length field in the command, and press F2 on your keyboard to open the Expression Builder dialog box. Select the required length feature, such as the measured plane, and create an expression that computes the difference between the nominal and measured values as shown below:

Expression Builder Dialog Box for Length

Repeat the above procedure for the diameter as shown below.

Expression Builder Dialog Box for Diameter

For details on how to use and create expressions with the Expression Builder dialog box, see "Creating Expressions with the Expression Builder" in the PC-DMIS Core documentation.

PC-DMIS adds the following line to the measurement routine:

When PC-DMIS NC executes the CNC command, it generates a request file.

• The last (or right-most) value (0.009508 in the example image below) is the tool length update which is derived from the plane deviation.

• The next-to-last value (-0.105050 in the example image below) is the tool radius update which is derived from the Circle 1 diameter deviation.