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Machine Tool Calibration is rapidly becoming an essential part of the manufacturing process with customers demanding higher accuracy from machine tools for handling precision parts with tighter tolerances. The ability of a machine tool to perform at its optimum level is largely based on the geometrical and positioning accuracies of the machine slides and guide ways. Machine tools are subject to positioning errors which might increase over a period of time due to natural wear and tear or failing parts or worn out moving parts.

Machine tool accuracy affects not only accuracy of parts produced but productivity as well and is often the root cause of component quality issues and hidden costs. Machine Tool Calibration can be performed to check accuracy and track machine capability or performance degradation due to wear. In other words, it is a 'health-check' or 'condition-monitoring' of any machine tool. Periodic calibration helps identify potential problems with machine tools, such as bad bearings, faulty servos, slip-stick conditions, and so on. Hence an early detection enables to schedule preventive maintenance and avoid unexpected downtime, especially during critical production runs. Thus calibration of machine tools becomes essential part of predictive maintenance programme in companies to achieve "Doing it right the first time".

Review of terminology
Geometrical testing of CNC Machine tools
Static tests - machine alignment testing using test charts
Working tests : Load test, NAS test, Circularity by ball bar
Interpreting test charts and corrective actions
Sources of errors and their rectification
Vibration & Noise
Need and benefits of calibration.
Accuracy, Repeatability and Resolution
National and International standards for determining Positional accuracy and Repeatability of machine tools.
Linear measurements - Linear scales, Laser interferometer : Principles of operation
Rotary Measurement - Autocollimator, Laser rotary calibrator
Demo of Laser Interferometer set up for calibration
Demo of Ball Bar measurements
Diagnosis of errors using graphs / plots obtained during calibration with case studies and examples.
Discussion about specific problems faced in industries reg. machine accuracy, testing and calibration

Key Takeaways

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Our Initiatives

Productivity Institute

The need for Productivity Institute

Is your work place suffering from poor productivity?
Do you feel that supervision is weak on the shop floor?
Do your shop floor personnel find it difficult to achieve targets?
You have the machine in place, but not the men to optimize usage?

Realizing the need to enhance the skill sets of fresh engineers in mechanical engineering to make "Industry Employable" and to mould them as per the company requirements, IMTMA organizes

The rapid growth of Indian machine tool Industry and the increasing sophistication of machine tool has created the need for a new breed of machine tool technologists.

IMTMA Training