FIELD OF THE INVENTION
The mentioned invention is in the field of Mechanical Metrology involving critical
geometrical parameters like Concentricity, Run‐out, parallelism on circular track and
perpendicularity.
BACKGROUND OF THE INVENTION
Manufacturing inspection facility is equipped with several sophisticated
measuring equipments which are unique as well as expensive. When their repair is not
economical, a few of their accessories, attachments, structure etc. can still be used for
inspection after a few alteration/modifications. This saves cost involved in the
procurement of additional inspection facilities.
The present invention is based on the utilization of functional components of an
old roundness checking machine to check geometrical parameters as mentioned above,
which otherwise require sophisticated measuring equipment.
SUMMARY OF PRESENT INVENTION
Present invention is used for checking critical geometrical parameters with regard to
following aspects:
1. One aspect of present invention is that it can be used to check concentricity.
2. Second aspect is it can be used to check run‐out.
3. Another aspect is it can be used to check parallelism on circular track.
4. Yet another aspect is it can be used to check perpendicularity.
Annexure-II
BRIEF DESCRIPTION OF THE DRAWINGS
Block diagram of the setup refer fig.A
DETAILED DESCRIPTION
Roundness checking machine is sophisticated equipment which is used to check
geometrical parameters of test pieces. This equipment has several attachments and
accessories which can be used alternatively also together with some other equipment to
check the geometrical parameters. Our present invention is conceived using its rotary
table, arm, column, base etc. together with a Dial Test Indicator (DTI) to check
geometrical parameters in a simple yet precise manner.
The setup/invention comprises of:
1. A radial arm, 102, which can translate in horizontal as well as vertical direction
2. Vertical column, 101, which comprises of a scale for linear measurement.
3. Rotary table, 104, which can rotate about its axis
4. DTI, 103, measures the deviation
5. Adjusting screws, 105 are used for leveling as well as centering of test piece.
6. Base, 106 is rigid and vibration resistant which ensures accurate and precise
measurement.
The test piece is mounted on rotary table (104) and DTI (103) is clamped on the radial
arm. The DTI (103) is adjusted on the surface on which geometrical parameters are to be
checked and the rotary table (104) is rotated. The deviation/deflection on DTI (103) is
used to determine the value of geometrical parameter in microns. (Refer figure A)

WE CLAIMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. The present invention comprises of rotary table, arm, column and base of roundness tester together with a DTI to check geometrical parameters.
2. The present invention as per claim 1, checks concentricity.
3. The present invention as per claim 1, checks run out.
4. The present invention as per claim 1, checks parallelism on circular track.
5. The present invention as per claim 1, checks perpendicularity.
6. The present invention, as per claim1, is cost effective solution in checking geometrical parameters. ,TagSPECI:As per Annexure-II