Application
This unit of competency defines the skills and knowledge required to apply service and repair techniques and procedures for balance staff replacement of mechanical watch oscillating systems and components.
No licensing, legislative or certification requirements apply to this unit at the time of publication.
Band: A
Unit weight: 4
Elements and Performance Criteria
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. | ||
1 | Determine job requirements | 1.1 | Follow standard operating procedures (SOPs) |
1.2 | Comply with work health and safety (WHS) requirements at all times | ||
1.3 | Select and use appropriate personal protective equipment (PPE) in accordance with SOPs | ||
1.4 | Identify job requirements from specifications, job sheets or work instructions | ||
2 | Identify oscillator types | 2.1 | Identify oscillating construction types and components |
2.2 | Establish the performance characteristics of the watch oscillating system | ||
2.3 | Record and document repair requirements | ||
3 | Diagnose oscillator condition | 3.1 | Select and use appropriate workshop tools and equipment |
3.2 | Inspect oscillator components for condition, function, end shake and performance | ||
3.3 | Record and report wear and damage to component parts | ||
3.4 | Determine appropriate repair process to rectify faults | ||
4 | Repair, replace and adjust oscillator components | 4.1 | Remove and reassemble balance complete and oscillator components using appropriate tools, equipment and techniques |
4.2 | Determine type and method of balance staff removal and replacement | ||
4.3 | Test security of replacement balance staff and oscillator components | ||
4.4 | Inspect condition and adjust balance wheel and oscillator components for correct operation | ||
4.5 | Determine type of roller and roller jewel and the method of removal and replacement procedures | ||
4.6 | Inspect, diagnose and adjust balance spring to achieve optimum performance and timekeeping | ||
4.7 | Inspect, service and replace components for shock protection devices fitted to mechanical oscillators | ||
5 | Test and adjust oscillator | 5.1 | Verify and confirm function of watch movement |
5.2 | Set up and operate mechanical watch timing machine and interpret readings | ||
5.3 | Verify watch performance and timekeeping | ||
5.4 | Adjust in-beat and rate, as required, according to performance and design characteristics | ||
Foundation Skills
This section describes those required skills (reading, writing, oral communication and numeracy) that are essential to workplace performance in this unit of competency.
Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.
Range Statement
This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. | |
Oscillator construction types include one (1) or more of the following: | roskoph nickel glycudur chronometer 2, 3, 4 arms bi-metal compensating annular balance spring tourbillion |
Oscillator components include one (1) or more of the following: | balance wheel balance spring balance staff roller roller jewel |
Performance characteristics include one (1) or more of the following: | timing and certified chronometer effects of temperature, shocks, magnetism and position of wear temperature compensation |
Record and document repair includes one (1) or more of the following: | extent and date of repair cost of replacement part time spent on procedure |
Workshop tools and equipment include the following: | hand tools levers roller removing tool staking set watchmaker's lathe balance wheel truing tool poising tool figure of eight calipers spirit lamp presto roller jewel fitting tool |
Oscillator components include one (1) or more of the following: | balance wheel balance spring balance staff roller roller jewel |
Type of construction includes one (1) or more of the following: | balance staff: friction fitted riveted screwed roller: single table double table incabloc two piece roller jewel shape: D shape triangular elliptical balance spring: flat overcoil helical spherical conical |
Wear and damage includes one (1) or more of the following: | balance staff pivots bent, scored or worn balance wheel out of true, damaged or enlarged hole roller tables deformed or damaged roller jewel cracked, chipped or missing balance spring centred flat, at the cock and collet |
Appropriate repair process includes one (1) or more of the following: | consideration of component cost and availability replace balance complete and balance staff repair or replace balance spring and roller dismantling and reassembling techniques inspections adjustments of components lubrication techniques, type and quantity use of stop oil treatments |
Type and method of balance staff removal and replacementincludes one (1) or more of the following: | friction fit riveted screwed turning rivet/hub on lathe knock out staking set grinding molfre tool shock-resistance |
Correct operation includes one (1) or more of the following: | balance staff secure fitting/tightness roller aligned and secure balance wheel true and static poised balance spring stud location in-beat balance spring adjusting and balance staff end shakes |
Type of roller and roller jewel includes one (1) or more of the following: | single and double tables two piece, shock-resistance D shaped, triangular or elliptical roller jewels |
Components of shock protection devices include one (1) or more of the following: | jewels endstones combined setting shock spring |
Watch performance includes one (1) or more of the following: | in-beat 0.5 ms amplitude (minimum 220 – 270 degrees, variations in positional errors) rate +/- 5 – 10 seconds a day |
Competency Field
Horology