#### Use Partial Calibration check box

When using the Renishaw scan-based method to calibrate a Renishaw analog probe (such as the SP25, SP600, or SP80), the first time it's calibrated using the Scan method must be the full calibration that runs the whole series of scans. After this full calibration, you can choose a more simplified calibration if desired.

- Full calibration calculates all the analog probing coefficients in addition to the tip offset and tip size.

- Partial (simplified) calibration works just like a non-analog probe calibration: it consists of discrete hits (no scans) and only calculates the tip offset and tip size; the analog probing coefficients remain unchanged.

To perform the simplified calibration,

1. Access the Probe Utilities dialog box.

2. Load a Renishaw analog probe from the Probe File list.

3. Select the Use Partial Calibration check box. This remains disabled for probes that do not apply.

4. Select one or more already calibrated probe tips from Active Tips List.

5. Click the Measure button. The Measure dialog box appears.

6. Make changes as needed on the Measure dialog box. If you define any named parameter sets PC-DMIS will store the state of the Use Partial Calibration check box in the set for future use.

7. Click Measure. Follow any on-screen prompts. PC-DMIS will perform the simplified calibration.

Note: A registry entry in the ProbeCal section called ProbeUsePartialCalibration stores the default for whether or not this check box is selected when you define a new probe file.

RAW DOCUMENTATION

From Email:

Basically for an analog probe that will be calibrated with the Renishaw Scan method the first time it's calibrated it must be done with the full calibration that runs the whole series of scans. After it's been calibrated once you can then choose the simplified calibration if desired. The full calibration calculates all the analog probing coefficients in addition to the tip offset and tip size. The simplified calibration works just like a non-analog probe calibration and it only calculates the tip offset and tip size. The analog probing coefficients remain unchanged.

From Design Doc:

• The Renishaw scan based method is currently the only one available for a full calibration of an SP25 probe with scanning module. It can also be used on other Renishaw analog probes such as the SP600 and SP80.

• Once fully calibrated a given tip can later be re-calibrated vi the Partial Calibration option. This is enabled/disabled via the “Use Partial Calibration” checkbox as shown above.

• The checkbox control will be disabled (greyed out) for probes where it does not apply and/or may be hidden entirely on some machine types where it can never apply.

• The partial calibration will consist of discrete hits (no scans) and only the tip offset and size will be adjusted. The analog calibration coefficients will remain unchanged.

• Attempts to execute a partial calibration where one or more selected tips are uncalibrated will produce an error as this is not valid.

• The selection of this option should be made before licking the Measure button. It cannot be changed while the associated Measure Probe dialog is present.

• This option will be saved as part of any Named Sets created for use with Autocalibrate.

• A new registry entry in the ProbeCal section called "ProbeUsePartialCalibration" will be used to track the most recently use selection in order to provide a default when creating the next new probe file. Once a probe file is created the selection is saved within the probe, and potentially within any Named Sets, independently of the registry entry and/or other probe files.

From Notes:

The Partial Calibration will only update the tip offset and size. It will not modify the analog calibration coefficients.

Full Calibration will be required at least once before partial calibration is valid.

The choice should have no effect, and preferably be unavailable for selection, for probes and/or machines where it does not apply.

The choice should be remembered in Names Sets for use with Autocalibrate commands.