ITAGEAR, an accessory program of Itastat, was developed for the acquisition and storing of data from an electronic transducer installed on a gear inspection system. Acquired data are then processed to reconstruct the profile of the coupling of two gears and calculate the following typical features:

Rotation control Fi"
This relative measurement is also called Radial Composite Error. When measuring a gear compared to a master gear, the measurement is made taking into consideration the complete rotation of the gear. When a pair of gears is controlled, the measurement takes into consideration the complete rotation of the gear with the greatest number of teeth.

Tooth step control fi"
This relative measurement is also known as Radial Tooth to Tooth Composite Error. It's the difference between maximum and minimum values of the data read on the rotation angle equal to 360°/z where z equals the number of teeth of the biggest gear.

Eccentricity control Fr"
This relative measurement, also called Radial Runout, is calculated as the maximum variation of the distance between gear axes using frequency analysis to eliminate nick or vibration effects.

Nicks recognition ZB
Itagear considers every fi" value out of tolerance as a nick and shows the total number as well as the value of the biggest nick. To locate the nicked tooth, the program performs an analysis depending on the relationship between the number of teeth of the gears. The condition is to have gears with different numbers of teeth and perform two complete rotations of the smallest one.

Diameter/Center distance Control (min Aa"i, max Aa"e, average Aa" value)
This absolute measurement requires a master gear with known average diameter/center distance. Zero adjustment of Itagear is dynamic on the average value.

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