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Root scan


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It is not possible to trace an involute curve profile below the base diameter because that is the origination point of the involute curve. Also, when using the traditional generative measurement method the CMM will move the stylus along the base tangent in unison with the rotary axis to trace the profile. Because the stylus can only move along the base tangent it is unable to reach below the base diameter.

It is possible to measure the root area against a nominal curve with the CMM using but the results cannot be integrated with the Gearpro profile charts.
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You say, you can not go under base diameter.

In main technology in measuring profle you get extrapol. scanning path pretravel and posttravel
The input is in micrometer and maximum is 1000 .
In your case you have set the pretravel.

Dont forget to set the acceleration for Profile to less the 10% to avoid had collisions because of deflection of the probe head.
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