Principle

Accuracy of gear geometrical shape is detected by movement of measuring probe on tooth surface during turning cycle of measured gear at the same time.

When profile (involute) is measured, the probe move radially against the gear, for inclination (helix angle) parallel with gear axis.

Measuring of run-out and pitch is done by probe contact with teeth sides in teeth spaces. Geometrical correct model of teeth sides calculated mathematically.

The control program is made and written under the Borland C++ in WINDOWS´95 including all standards and usage valid for WINDOWS´95. The instrument activity is controlled by symbols.

• use in machine shop environment
• scanning of involute form of tooth, scanning of tooth surface in axial direction
• by means of a special processing methods to count deviations of profile, tooth side inclination pitches and radial run-out,
• setting-up in metric (mm) or inches (˛) dimension
• n setting-up of angle measure in basic form (XX° XX´ XX?) or in decimal form (XX,XXX° )
• measuring of gearing:

• module gearing
• DP gearing
• CP gearing

• execute calibration of measuring instrument and positioning of reference point for measuring in automatic cycle
• parameters of measured gear display again from databank incl. graphs measuring
• select for measuring-tooth or tooth space measuring
• measuring control with adjustment of different parameters in accordance with customer wish :

• measuring of tooth inclination:

• number of measuring teeth eligible (1 - 4)
• it is possible to measure left or right tooth flank or both tooth flanks
• evaluation: Standard, Barrel

• measuring of tooth form (profile)

• number of measuring tooth eligible (1 - 4)
• it is possible measure left or right tooth flank or both tooth flanks
• evaluation: Standard, Barrel

• measuring of pitch and radial run-out incl. run-out of root diameter

• possibility measuring of root diameter
• across teeth dimension (min/max)
• across balls dimension (min/max)

• choice of speed and sensitivity of measuring

• It is possible to direct setting-up of deviations in mm instead of class accuracy

• The program makes possible display toleration and regulation limits by means of colour light

• red - out of the tolerance limit
• yellow - out of the regulation limit
• green - OK - satisfactory

This evaluation is valid for all deviations and serve for quick orientation of operator

• The program has possibility block individual functions for prevention of damage
• To display the measured deviations on monitor
• To display graphic individual measuring test results on monitor

• deviation of profile
• deviation of tooth inclination
• deviation of radial run-out
• deviation of individual tooth pitch (left or right flank)
• deviation of adjacent tooth pitch (left or right flank)
• deviation of total tooth pitch (left or right flank)

• Setting-up language version on monitor for measuring and print the protocol (record):

• standard: Czech, German, English, the others versions are available as optional equipment

• Setting-up language version on monitor for measuring and print the protocol (record):
• standard: Czech, German, English, the others versions are available as optional equipment
• Setting-up print of protocol in the different size - black and white or colour versions
• Save the results into databank with a possibility to display again tested values and graphs at any later time incl. reservation measured values on special medium
• Output and data saving in a form suitable for further processing by program SPC for quality control (special accessories)

The instrument model DO-3 PC is selected for testing of gearing deviations so that during evaluation it is possible to choose accuracy classification according to original DIN 3962 or direct instruction for evaluation in mm.

Before beginning of testing you can choose accuracy of class tested gear. According to the chosen value the gear is tested, overcrossing is recorded by marked printing.

As concern the form of gearing it is possible to measure spur gears, internal gears, including longitudinal and modification of gearing. In a special execution it is possible to measure shaping cutters, hobs and involute grooving.

For more details you can downland technical description of the instrument.