#### Step 1 - Select the ACR1 Probe Changer

To begin the calibration process, select Edit | Preferences | Probe Changer to open the Probe Changer dialog box.

Probe Changer dialog box - Type tab

To select the ACR1 Probe Changer, follow these steps:

1. Once the Probe Changer dialog box is open, select the Type tab.

2. Select ACR1 from the Probe changer type list.

3. Specify the number of different types of probe changers in the Number of probe changers box.

4. Specify the Docking speed. The default value of 5% is appropriate for most machine configurations.

5. Click Apply to make this probe changer active and to load settings that are relevant to this probe changer. Other tabs become visible after you click Apply.

In the next step, you will define the communications port.

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