Q
Adjustment of the thread trimmer with changing the width
between needles
( 1 ) Replace the throat plate, the feed dog, the needle clamp, and the presser foot. When the width
between needles is 1/2 inches or more, replace the thread guide too.
(Since the throat plate and the feed dog are special parts designed for the thread trimming
machine, be sure to use those specified by us.)
Note: When the width between needles is 3/4 inches or more, replace the pitman rod Ⓛ.
( 2 ) Lean the machine head backward.
( 3 ) Loosen two link clamp bolts Ⓙ.
( 4 ) Remove the spring Ⓜ.
( 5 ) Loosen hook saddle clamp screws Ⓐ and Ⓑ,
and adjust the gap between the needle and
the hook.
( 6 ) After adjusting the needle and the hook,
install the spring Ⓜ.
( 7 ) Contact thread trimmer rocking cranks Ⓒ
and Ⓓ to stopper pins Ⓔ and Ⓕ, and tighten
the Link clamp bolt Ⓙ.
( 8 ) Turn the pulley and stop it at the position where the needle comes to the lowest.
( 9 ) Loosen nuts Ⓖ and Ⓗ.
(10) Push the cam follower crank Ⓚ and adjust the pitman rod Ⓛ so that the cam roller can smoothly
enter the thread trimmer cam groove.
(11) Adjustment of the cam groove and the cam roller
a ) Put the cam roller into the thread trimmer cam groove by pushing the cam follower crank Ⓚ.
b ) Turn the pitman rod Ⓛ, and adjust the gap between the cam roller and the surface N of the
cam groove as small as possible, and tighten nuts Ⓖ and Ⓗ.
c ) Push the cam follower crank Ⓚ again and check that the cam roller enters the thread trimmer
cam groove smoothly.
HOW TO USE
Cam roller
Cam follower crank Ⓚ
Lower shaft
Thread trimmer cam
Cam groove
Surface N
Screw Ⓐ
Thread trimmer
rocking crank Ⓒ
Screw Ⓑ
Bolt Ⓙ
stopper pin Ⓕ
stopper pin Ⓔ
Link
Hook saddle
(left)
Hook saddle
(right)
Screw Ⓐ
Thread trimmer rocking crank Ⓓ
Nut Ⓖ
Pitman rod Ⓛ
Spring Ⓜ
Nut Ⓗ
Thread trimmer cam
Cam roller
Cam follower
crank Ⓚ
Screw Ⓑ
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