Inspecting components using co-ordinate measuring methods

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This standard identifies the competencies you need to inspect pattern, corebox or model components using co-ordinate measuring methods (CMM), in accordance with approved procedures. You will be required to prepare and set up the equipment in readiness for the inspection operations, and this will involve obtaining the correct component program, which may be on media downloaded from a remote computer, or entered into the controller manually.

You will be expected to mount the workpiece in a suitable position on the machine table, and to select and mount appropriate inspection probes to the machine spindle. You will need to ensure that all the inspection probes have been allocated a relevant tool number, and that the relevant data on their co-ordinates and datum positions is entered into the operating program and machine. This will involve loading and proving component programs, checking for errors/faults, editing and saving program changes. You will also be required to adjust the equipment and program, following proving/editing procedures, to achieve correct component specification.

Your responsibilities will require you to comply with organisational policy and procedures for the setting up and operating activities undertaken, and to report any problems with the equipment, tooling, programs or setting up activities that you cannot personally resolve, or are outside your permitted authority, to the relevant people. You will be expected to work with minimum supervision, taking personal responsibility for your own actions and for the quality and accuracy of the work that you carry out.

Your underpinning knowledge will provide a good understanding of your work, and will provide an informed approach to the setting-up procedures used. You will understand the co-ordinate measuring equipment used, and its application, and will know about the machine operating programs, inspection probes, setting-up and operating procedures, in adequate depth to provide a sound basis for setting up the equipment, correcting faults and ensuring the inspection activities are carried out to the required specification.

You will understand the safety precautions required when working with the machine and its associated equipment. You will be required to demonstrate safe working practices throughout, and will understand the responsibility you owe to yourself and others in the workplace.

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1. work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
2. use the correct control program and ensure it is correctly loaded into the machine controller
3. follow the correct procedures for calling up the program and dealing with any error messages or faults
4. confirm program integrity
5. load and correctly set up all associated equipment
6. adjust the equipment and program operating parameters to optimise the outcomes to be achieved
7. check that all safety mechanisms are in place and that the equipment is set correctly for the required operations
8. carry out the inspection activities in accordance with approved procedures
9. deal promptly and effectively with problems within your control and report those that cannot be solved

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1. the specific safety precautions to be taken when loading and proving co-ordinate measuring machine (CMM) operating programs
2. how to start and stop the machine in normal and emergency situations
3. the importance of wearing the appropriate protective clothing and equipment (PPE), and of keeping the work area clean and tidy
4. how to use and extract information from engineering drawings and related specifications (to include symbols and conventions to appropriate BS or ISO standards in relation to work undertaken)
5. how to interpret first and third angle drawings, imperial and metric systems of measurement, workpiece reference points and system of tolerancing
6. how to interpret CNC drawings, and the use of workpiece zero/reference points
7. the systems of measurement used on CNC drawings (including absolute and incremental)
8. the computer coding language used in co-ordinate measuring machine programs (with regard to machine axes, positional information, machine management and auxiliary functions)
9. the use of repetitive programs and program loops to reduce program size and inputting time
10. how to prepare part programs, using operational sequences and inspection techniques that avoid unnecessary probe movements or tool changes
11. the function keys and operating system of the machine computer control system being operated
12. how to set the machine controller into the program and editing modes, and how to enter or download the prepared program
13. how to place the machine into the correct operating mode, and access the program edit facility, in order to enter inspection probe data (such as probe datums, positions, lengths, offsets, radius compensation)
14. how to load, execute, edit and exit programs correctly
15. how to set machine datums for each machine axis being used
16. how to deal with error messages and faults, on the program or co-ordinate measuring machine equipment
17. how to conduct trial runs (using single-block run, dry run and feed override controls)
18. the items that you need to check before allowing the machine to operate in full program run mode
19. how to save the completed programs in the appropriate format, and the need to store program safely how to conduct the inspection activities, and compare results achieved against the component specification
20. typical problems that can occur with the inspection activities, and what to do if they occur
21. the extent of your own responsibility and whom you should report to if you have problems that you cannot resolve

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You will be able to apply the appropriate behaviours required in the workplace to meet the job profile and overall company objectives, such as:

• strong work ethic
• positive attitude
• team player
• dependability
• responsibility
• honesty
• integrity
• motivation
• commitment

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2

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29 Apr 2021

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Current

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Original

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Semta

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SEMPAT26

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Engineering, Engineering and Manufacturing Technologies, Functional Managers, Managers and Senior Officials

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8131

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engineering; woodworking; pattern making; model making; inspection; components; co-ordinate measuring; methods; CMM; pattern; corebox; model

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