This unit of competency applies to servicing work on clock escapements and oscillating systems undertaken in clock service and repair workshops.

This unit has been developed for watch and clock service and repair apprenticeship training and the recognition of trade-level skills in watch and clock servicing and repair.

Band: A

Unit weight: 4 points

MEM21017A

Service and repair clock timepieces

MEM21013A

Service, test and adjust watch escapements

MEM21012A

Service and repair watch oscillating systems

MEM21009A

Inspect, diagnose, adjust and repair mechanical watches

MEM21008A

Service mechanical watches

MEM18001C

Use hand tools

ELEMENT

PERFORMANCE CRITERIA

1. Identify escapement and oscillator type

1.1. Identify clock escapements/oscillating systems and applications

1.2. Establish the performance characteristics of the clock according to escapement and oscillating system

1.3. Record and document repair requirements

2. Diagnose clock escapements and oscillators

2.1. Select and use workshop tools and equipment appropriately

2.2. Inspect clock escapement and oscillators for correct function, engagement and performance

2.3. Record and report wear and damage to parts

2.4. Determine appropriate repair process to rectify faults

3. Repair and adjust clock escapements and oscillators

3.1. Remove and reassemble escapement/oscillators using appropriate tools, equipment and techniques

3.2. Determine theoretical length of replacement pendulum

3.3. Repair or replace escapement and oscillator components

3.4. Adjust escapement and oscillator components for correct operation

4. Service and adjust torsional pendulums

4.1. Remove and reassemble torsional pendulums and oscillator components using appropriate tools, equipment and techniques

4.2. Inspect torsional pendulum components and identify condition and wear

4.3. Repair and replace torsional pendulum

4.4. Adjust torsional pendulum for correct operation (in-beat)

5. Service and set up platform escapements

5.1. Remove and reassemble platform escapement using appropriate tools, equipment and techniques

5.2. Inspect platform escapement and identify condition/wear

5.3. Repair and replace platform escapement

5.4. Adjust platform escapement and correct depthing with contrate wheel

6. Test and adjust rate

6.1. Verify/confirm function of clock movement

6.2. Correctly set up and operate mechanical clock timing machine and interpret readings

6.3. Verify clock performance and rate testing

6.4. Adjust rate, as required, according to performance and design characteristics

Required skills

Required skills include:

identifying clock escapements and oscillators

adjusting escapement function

diagnosing faults

adjusting rate

setting up and operating timing machine

Required knowledge

Required knowledge includes:

clock escapement types

oscillator types

performance characteristics of escapements and oscillators

escapement adjusting techniques

clock servicing procedures and techniques

calculations and formulas for length of pendulum and geometry of escapements

occupational health and safety (OHS) regulations and procedures

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to service, inspect and adjust clock escapement and oscillating system to industry standards, manufacturer specifications and in accordance with safety regulations and procedures.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently:

identify different types of clock escapements

diagnose faults in clock escapement action

repair faults in worn escapements

set up and adjust clock escapements for optimum performance

fault-find oscillating systems

calculate length of replacement pendulum

adjust rate of timepiece.

Context of and specific resources for assessment

Assessment may occur on the job or in an appropriately simulated environment. Access is required to real or appropriately simulated situations, including work areas, materials and equipment, and information on workplace practices and OHS practices.

Where applicable, reasonable adjustment must be made to work environments and training situations to accommodate ethnicity, age, gender, demographics and disability.

Access must be provided to appropriate learning and/or assessment support when required. Where applicable, physical resources should include equipment modified for people with disabilities.

Method of assessment

Assessment must satisfy the endorsed Assessment Guidelines of the MEM05 Metal and Engineering Training Package.

Assessment methods must confirm consistency and accuracy of performance (over time and in a range of workplace relevant contexts) together with application of underpinning knowledge.

Assessment methods must be by direct observation of tasks and include questioning on underpinning knowledge to ensure its correct interpretation and application.

Assessment may be applied under project-related conditions (real or simulated) and require evidence of process.

Assessment must confirm a reasonable inference that competency is not only able to be satisfied under the particular circumstance, but is able to be transferred to other circumstances.

Assessment may be in conjunction with assessment of other units of competency where required.

Guidance information for assessment

Assessment processes and techniques must be culturally appropriate and appropriate to the language and literacy capacity of the candidate and the work being performed.

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Clock escapements/oscillator systems

Clock escapements/oscillator systems may include:

verge

recoil escapement

deadbeat escapement

cylinder

platform (e.g. lever escapement and cylinder)

simple pendulum

compound pendulum

compensating pendulum

torsion pendulum

floating balance

suspension systems (e.g. spring blade, knife edge and silk)

Record and document repair

Record and document repair may include:

extent and date of repair

cost of replacement part

time spent on procedure

Adjust escapement and oscillator

Adjust escapement/oscillator may include:

condition amount of drop

condition and extent of lockings

condition and amount of impulse

pendulum action and amplitude

in-beat

Torsional pendulums

Torsional pendulums may include:

400 day and Atmos clocks

suspension spring

Unit sector

Horology

This unit contains employability skills.