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15) Adjusting trimming device
(1) Adjusting the trimmer driving part
A. Fixing the position of trimming cam (See figure 42)
a) Turn the pulley with hand to place the needle bar
⑥at its lowest position.
b) With the left side of the trimming cam① softly
attached to the right side of the lower shaft
medium bushing②, turn the cam to align the base
point③ with the carve④ in the lower shaft
medium bushing crank.
c) Fasten tightly the trimming cam fixing crews(3)
⑤. Now, turn the pulley with hand to see
whether or not the machine turns smoothly.
[Figure 42]
Lowest
point
B. Adjusting the stopper pin holder (See figure 43)
a) Once the necessary trimming for trimming cam lead is finished, make sure to turn the machine pulley to place the
trimming cam ③ in the right position, so that the roller① can enter the complementary straight line range ②
b) Press down the trimmer shake linkage ④ to make the roller ① come inside the trimming cam ③,
※ Adjust the holder ⑦ to make the right equal point of the roller① adhere ⑤ smoothly to the right inside of the
cam’s complementary straight line②, and the left equal point of the stopper pin⑥ adhere⑧ smoothly to the
left inside of the stopper pin holder⑦. Once this is done, tightly fasten the fixing screw ⑨.
※ Once such adjustments are made, the trimmer shake linkage④ will not move even when shaken to its sides
(the roller is inside the cam). Make sure to check if the shake linkage④ returns to its original position⑩
quickly and smoothly when released. If not, proceed with horizontal adjustment of stopper pin holder ⑦.
[Figure 43]
※ The present cam stop position: still inside
the complementary straight line of cam
leading, right before the roller drops out
upon finishing trimming.
Complementary
straight line
Trimming
finishing point
Movable knife
operation
starting point
[Trimming cam lead]
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