#### Notes on SP600 Upper Level Matrix (Regular Calibration):

The following notes apply to the Upper Level Matrix calibration when using an analog type probe.

Using OPTIONPROBE Commands with Analog Probe Types

An OPTIONPROBE command gets inserted into the part program any time values are changed on the Opt. Probe tab of the Parameter Settings dialog box. For information on the Parameter Settings dialog box, see the "Parameter Settings: Optional Probe tab" topic in the "Setting Your Preferences" chapter of the PC-DMIS Core documentation.

If PC-DMIS encounters an OPTIONPROBE command in the current part program before the probe's LOADPROBE command, the calibration will use the values from the OPTIONPROBE command. If the OPTIONPROBE command doesn't precede the LOADPROBE command, PC-DMIS uses the default values stored in the PC-DMIS Settings Editor.

For versions 3.25 you should include such an OPTIONPROBE command in order to make sure the qualification procedure uses the correct values. Even if the parameters to be used are the normal defaults for the particular machine, you should still specify these values in an OPTIONPROBE command because V3.25 does not automatically use the machine specific defaults without an appropriate OPTIONPROBE command.

For version 3.5+ you don't need to include the default machine values in an OPTIONPROBE command because PC-DMIS automatically uses the machine specific defaults if it can't find an OPTIONPROBE command. The default parameters are stored in the ANALOG_PROBING section in the PC-DMIS Settings Editor.

Important: Using the OPTIONPROBE command may limit the portability of the part program. Since PC-DMIS uses machine specific data in the OPTIONPROBE command you may get inaccuracies if you run the part program on a computer using a different CMM. Unless you really need to use the OPTIONPROBE command (i.e. measuring a really soft part), you generally shouldn't use an OPTIONPROBE command in this version. PC-DMIS can automatically grab the default machine values automatically from the PC-DMIS Settings Editor.

Changing the Default Calibration Algorithms

The default 3D calibration algorithm for the SP600 has been changed to Trax. You can find the registry setting that controls this under the OPTION heading with the UseTraxWithSP600 entry.

PC-DMIS, by default, now sets this entry equal to 1 which means that Trax will be the default algorithm. Of course you are free to try out which algorithm works best for your particular situation.

If using Trax calibration for the SP600, the effective tip size generated from the calibration will differ from the design value.

If using Trax calibration for non-SP600 analog probes on the Wetzlar machines, the design value of the tip size is used because tip size deviation is handled differently.

If using non-Trax calibration, the design value of the tip size is used.

For information on the PC-DMIS Settings Editor, see the "Modifying Registry Entries" documentation.

Taking Extra Sampling Hits

The UseAnalogSampling entry no longer exists in the Settings Editor. Instead, you can use the following registry items to work with your sampling hits.

- UseAnalogSamplingLatitudeStart

- UseAnalogSamplingNumHits

- UseAnalogSamplingNumLevels

For all these entries the default is None (-1). For information on these entries, see the "Modifying Registry Entries" documentation.