How To Adjust The Thread Trimmer Device - SunStar KM-1957-7 User Manual

8-8. Adjusting for thread trimmer
1. Adjusting the trimmer driving part
1) Fixing the position of trimming cam
a) Turn the pulley using a hand to place the needle bar
① at its lowest position.
b) With the left side of the trimming cam ② softly
attached to the right side of the lower shaft medium
bushing ③, turn the cam to align the base point ④
with the carved sign ⑤ in the lower shaft medium
bushing crank.
c) Fasten tightly 3 trimming cam fixing crews ⑥. Now,
turn the pulley using a hand to see whether or not the
machine turns smoothly.
2) Adjusting the trimmer link stopper (See Figure 56.)
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,
※ Adhere the stopper adjusting body ⑨ with the left equal point of trimmer shake linkage ⑥ to make the left equal point of
the roller ① adhere smoothly ⑤ to the left inside of the cam' s complementary straight line ②, and the right equal point
of the trimmer shake linkage ⑥ adhere ⑧ smoothly to the inside of the stopper ⑦. Once this is done, tightly fasten 2
fixing screws ⑩.
※ Once such adjustments are made, the trimmer shake linkage ⑥ will not move even when shaken to its sides (the roller is
inside the cam). Make sure to check if the trimmer shake linkage ⑥ returns to its original position quickly and smoothly
when released. If not, proceed with horizontal adjustment of stopper ⑦ and the stopper adjusting body ⑨.
c) Check to see whether the trimmer shake linkage ⑥ and the stopper adjusting body ⑨ move lightly horizontally when the
trimmer is moved manually.
36
(complementary straight line)
trimming finishing point
movable knife operation
starting point
[Trimming cam lead]
[ Figure 55 ]
[ Figure 56 ]