Rita Charitable Trust

CAM Machine Operator

SECTOR: GEMS & JEWELLERY
SUB-SECTOR: Cast and Diamonds-Set Jewellery
OCCUPATION: Master making
REFERENCE ID: G&J/Q2401
ALIGNED TO: NCO-2004/ NIL
CAM Machine Operator: A Computer-aided Manufacturing (CAM) machine
operator produces jewellery prototype using different technologies.
Brief Job Description: The individual interprets the three-dimensional (3D)
jewellery design, feeds design parameters in the CAM machine and produces
resin based prototypes. The model prototype serves as a sample for
manufacturing jewellery or components.
Personal Attributes: The job requires the individual to be creative and have
analytical thought process, attention to details, quick response, and ability to
work in a process driven team. The individual must also have problem solving
skills in order to maintain CAM machine and produce defect-free prototype of
product.

Unit Code G&J/N2401
Unit Title
(Task) Produce resin-based prototype using CAM machine
Description This OS unit is about producing resin based prototype using CAM machine for a
range of jewellery designs. The prototype is used for manufacturing jewellery or
components in large quantity
Scope This unit/task covers the following:
Receive the design concepts and instructions from different sources
collect 3-dimensional (3D) designs from merchandiser or designer
inspect 3D designs for practicality of manufacturing model
interpret and understand the design requirement in terms of size, weight,
shape, stones, etc.
Produce resin based prototype
upload the 3D CAD design into the computer system
set up CAM machine
select milling fixture as per design
fix up the frame and clamp
calibrate the fixtures and set the positions
select cutting beads and install using magnetic clamp
select the resin type, size and thickness according to jewellery design
start the machine for milling operations
as per the design requirement, perform rolling operations
realign the machine for double sided operations
set the jewellery prototype onto the rolling machine
monitor the operations
check quality of the prototype resin based jewellery model against design
Return produced resin jewellery model to merchandiser or product development
head
self-check each design in terms of surface finishing, dimensions and clarity
ensure timely delivery of the required number of quality okayed resin jewellery
models
Report problems related to:
complexity of designs
faulty equipment or software operation and report them to the appropriate
person
errors on any resin jewellery models made, and identify appropriate action to
rectify
reasons for anticipated delays that may adversely affect delivery

Performance Criteria(PC) w.r.t. the Scope
Element Performance Criteria
Producing resin based
prototype using CAM
machine
To be competent, the user/individual on the job must be able to:
PC1. accurately set up and calibrated CAM machine
PC2. select appropriate cutting tools
PC3. select resin type, size and thickness according to jewellery design
PC4. accurately measure design dimensions (prong thickness, gap between
diamonds)
PC5. prepare detailed note for the precision required at the manufacturing stage
PC6. inspect and report 3D design errors before CAM operation
Productivity To be competent, the user/individual on the job must be able to:
PC7. timely deliver resin based prototype/model for mass production of
jewellery pieces
PC8. produce number of prototype/model as per target given
Quality of output To be competent, the user/individual on the job must be able to:
PC9. produce quality approved models as per the design and instructions given
by merchandiser or designer
PC10. minimise productions disruptions because of model imperfections
Knowledge and Understanding (K)
A. Organizational
Context
The user/individual on the job needs to know and understand:
KA1. company’s policies on: quality, incentives, delivery standards, safety and
hazards, integrity and IPR, personnel management and dress code
KA2. importance of the individual’s role in the workflow
KA3. reporting structure
B. Technical
Knowledge
The user/individual on the job needs to know and understand:
KB1. use of computers, cam workstation software and hardware, MS office,
data management software, internet, etc.
KB2. the principles of drawing jewellery shapes
KB3. different type of jewellery products: rings, bracelets, pendants, necklace,
etc.
KB4. different type of resins and their properties
KB5. manufacturing drawing conventions
KB6. basic manufacturing techniques including types of diamonds and/or
gemstones settings
KB7. basics of design techniques, tools, principles involved in production of
precision designs, blueprints, drawings, and models
Skills (S) [Optional]
A. Core Skills/ Generic
Skills
Reading and writing skills
The user/ individual on the job needs to know and understand how to:
SA1. read notes, designs and instructions in terms of master model making
SA2. read company rules and compliance documents required to complete the
work

SA3. read technical drawings and 3D CAD design
Calculation and Geometry skills
The user/individual on the job needs to know and understand how to:
SA4. measure the size and thickness according to jewellery design
SA5. assess accuracy of alignment of fixtures and resin into the CAM machine
SA6. mathematical calculations used in computer aided modelling
Teamwork and multitasking
The user/individual on the job needs to know and understand how to:
SA7. share work load when multiple deliverables are required
SA8. deliver the model on time
B. Professional Skills Creative thinking
The user/individual on the job needs to know and understand:
SB1. visualisation and interpretation of 3D jewellery designs
SB2. translation of 3D jewellery designs to prototype/model
Computer and Machine operations
The user/individual on the job needs to know and understand how to:
SB3. use computers and software
SB4. use CAM machine and its applications
SB5. maintain CAM machine
Reflective thinking
The user/individual on the job needs to know and understand how to:
SB6. improve work processes or greater productivity
SB7. pre-empt complexity of the design in order to increase the production
speed of CAM modelling
SB8. provide information relevant to production department
SB9. suggest necessary design changes for practicality and maintaining look of
the jewellery designs
Critical thinking
The user/individual on the job needs to know and understand how to:
SB10. anticipate process disruption and reasons for delay

Unit Code G&J/N2402
Unit Title
(Task) Produce resin-based prototype using RPT CAM machine
Description This OS unit is about producing resin based prototype using rapid prototyping CAM
machine for a range of jewellery designs. The prototype is used for manufacturing
jewellery or components in large quantity
Scope This unit/task covers the following:
Receive the design concepts and prepare for RPT machine operations
receive CAD design file of jewellery in STL or SLC format
use Magic software to check file for properly aligned and merged file parts
use shell option to combine files into single part
run checks for naked-edges to avoid machine error
create supports on RPT for jewellery to support delicate or critical parts
select automatic options in software for creating supports
save Magic file
save STL file
Use RPT machine for generating resin prototype
use uploading software to upload the two files on appropriate platform
calibrate the machine for vibration minimiser
select appropriate ratios up to required limits, for calibration
remove calibrate plate
select resin type for, say, casting or die-cutting
fix platform to develop the top-down model
note the duration for making
Remove model from RPT machine
take the platform out along with the prototype piece(s) made
peel out the prototype
use isopropyl alcohol to clean the prototype
dry in UV machine
send for casting process
Report problems related to:
complexity of designs
faulty equipment or software operation and report them to the appropriate
person
errors on any resin jewellery models made, and identify appropriate action to
rectify
reasons for anticipated delays that may adversely affect delivery

Performance Criteria(PC) w.r.t. the Scope
Element Performance Criteria
Producing resin based
prototype using CAM
machine
To be competent, the user/individual on the job must be able to:
PC1. accurately set up and calibrated CAM machine
PC2. select appropriate cutting tools
PC3. select resin type, size and thickness according to jewellery design
PC4. accurately measure design dimensions (prong thickness, gap between
diamonds)
PC5. prepare detailed note for the precision required at the manufacturing stage
PC6. inspect and report 3D design errors before CAM operation
PC7. upload file correctly
PC8. calibrate accurately for minimum vibration
PC9. clean the prototype properly
Productivity To be competent, the user/individual on the job must be able to:
PC10. timely deliver resin based prototype/model for mass production of
jewellery pieces
PC11. produce number of prototype/model as per target given
Quality of output To be competent, the user/individual on the job must be able to:
PC12. produce quality approved models as per the design and instructions given
by merchandiser or designer
PC13. minimise productions disruptions because of model imperfections
PC14. ensure that multiple pieces on the prototype platform do not touch one
another
Knowledge and Understanding (K)
C. Organizational
Context
The user/individual on the job needs to know and understand:
KA1. company’s policies on: quality, incentives, delivery standards, safety and
hazards, integrity and IPR, personnel management and dress code
KA2. importance of the individual’s role in the workflow
KA3. reporting structure
D. Technical
Knowledge
The user/individual on the job needs to know and understand:
KB1. use of computers, 3-D design software, CAM workstation software and
hardware, MS office, data management software, internet, etc.
KB2. the principles of drawing jewellery shapes
KB3. different type of jewellery products: rings, bracelets, pendants, necklace,
etc.
KB4. different type of resins and their properties
KB5. manufacturing drawing conventions
KB6. basic manufacturing techniques including types of diamonds and/or
gemstones settings
KB7. basics of design techniques, tools, principles involved in production of
precision designs, blueprints, drawings, and models
KB8. RPT machine operations
KB9. identification location and number of supports as well as breakage points

KB10. minimum thickness possible with the machine
KB11. Wiper and milling technologies(alternatives)
Skills (S) [Optional]
C. Core Skills/ Generic
Skills
Reading and writing skills
The user/ individual on the job needs to know and understand how to:
SA1. read notes, designs and instructions in terms of master model making
SA2. read company rules and compliance documents required to complete the
work
SA3. read technical drawings and 3D CAD design
Calculation and Geometry skills
The user/individual on the job needs to know and understand how to:
SA4. measure the size and thickness according to jewellery design
SA5. assess accuracy of alignment of fixtures and resin into the CAM machine
SA6. mathematical calculations used in computer aided modelling
Teamwork and multitasking
The user/individual on the job needs to know and understand how to:
SA7. share work load when multiple deliverables are required
SA8. deliver the model on time
D. Professional Skills Creative thinking
The user/individual on the job needs to know and understand:
SB1. visualisation and interpretation of 3D jewellery designs
SB2. translation of 3D jewellery designs to prototype/model
Computer and Machine operations
The user/individual on the job needs to know and understand how to:
SB3. use computers and software
SB4. use CAM machine and its applications
SB5. maintain CAM machine
Reflective thinking
The user/individual on the job needs to know and understand how to:
SB6. improve work processes or greater productivity
SB7. pre-empt complexity of the design in order to increase the production
speed of CAM modelling
SB8. provide information relevant to production department
SB9. suggest necessary design changes for practicality and maintaining look of
the jewellery designs
Critical thinking
The user/individual on the job needs to know and understand how to:
SB10. anticipate process disruption and reasons for delay