### Step 3: Match the CMM Axes for Each Arm

The CMM axes for each arm must match. That is the X+, Y+, and Z+ axes for all arms must go in the same direction.

If you need to change the axes assignments and directions:

1. Make sure you're running PC-DMIS in Online mode.

2. On the Arm2 computer, select Edit | Preferences | Machine Interface Setup. The Machine Options dialog box will appear.

3. Select the Axes tab. This will show the X,Y, and Z axes combination boxes.

4. Using the X, Y, or Z lists, reassign the axes of the connected CMM so that they match the axes of Arm1. Usually only the X and Y axes will need modification.

5. Click Apply to keep the changes.

6. Once the dialog box closes, exit PC-DMIS.

7. Restart PC-DMIS, and verify that the changes are correct by moving the axes for both arms in the same directions. Make sure the axis counters increment accordingly.

Note: The numerical values in the counters will not match until you complete the multiple arm calibration.)

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