#### Step 9 – Measuring Datum Sphere with PEM Extension(s) (optional)

This example uses two Autojoint extensions (PEM modules) in slots 7 and 8. The system presents you with this message:

PC-DMIS MESSAGE: Please attach only the extension to be used in port 7. When you click OK if you have a wrist it may rotate (if needed) to allow for any rotation of the bottom joint. When prompted then take 1 hit on the bottom of the auto joint with the probe changer datum sphere. Be careful to avoid the small pins and holes and take the hit on a flat area.

After you complete this point the auto joint diameter will be measured in DCC.

If PEM (extensions) are used, it will be necessary to also take a manual hit at the bottom of each one as shown in the picture to the right. When you have completed these steps, click OK and DCC measurement will begin. |

PC-DMIS MESSAGE: Please attach only the extension to be used in port 8. When you click OK if you have a wrist it may rotate (if needed) to allow for any rotation of the bottom joint. When prompted then take 1 hit on the bottom of the auto joint with the probe changer datum sphere. Be careful to avoid the small pins and holes and take the hit on a flat area.

After you complete this point the auto joint diameter will be measured in DCC.

The picture to the right shows the manual hit being taken with the 50mm PEM identified as being stored in slot 8. When you have completed these steps, Click OK and DCC measurement will begin. |

PC-DMIS MESSAGE: All measurement is now complete. Please reconnect the probe used to measure the ports and then click OK.

This completes the ACR1 probe changer's calibration. The next step discusses how to review your calibration.

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