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II. Trade Skill: Be competent in: ffH$cf£ • t£If fi:
1. Doffing full ring bobbins and re- 1. lll^felilftM °
placing empty bobbins at a good
speed.
2. Operating the ring rail before and 2. $a$QgsKR£M
after doffing. Piecing and starting
ends.
3. Detecting faulty bobbins. 3.
4. Creeling roving bobbins and 4.
making good piecings.
5. Cleaning a ring spinning frame 5.
efficiently according to the
schedule.
III. Skill Standard:
"A" Grade Standard
(a) Start 10 adjacent ends in 35
seconds.
f£ o
(b) Doff 50 adjacent full bobbins (#) fi^n-f-Eg^M^^^HtfcjIS-hl
and replace with empty bobbins ^ 0
in 24 seconds without breaking ^
the ends.
"B" Grade Standard
Zi&WP
(a) Start 10 adjacent ends in 40 (a)
seconds.
(b) Doff 50 adjacent full bobbins ^ |g^=and
replace with empty bobbins
in 30 seconds without breaking
the ends.
"C" Grade Standard
(a) Start 10 adjacent ends in 45
seconds. ^> 0
(b) Doff 50 adjacent full bobbins (£) fg^Hand
replace with empty bobbins «^
w
in 36 seconds without breaking
the ends.
The above Standard are based on 20*s
(30 Tex) cotton yarn and 7" lift ring
bobbin being used.
IV. Trade Jests:
ffSSS"
1. Doff full bobbins and replace 1.
with empty bobbins, start ends
skilfully within a certain time as
specified in the Skill Standard.
2. Clean a ring spinning frame 2.
efficiently within a reasonable
time.
3. Run down the ring rail and stop 3.
a ring frame correctly.
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