JUKI MF-7900 Series Engineer's Manual page 25

Adjustment procedures
Loosen setscrews ❸ , adjust the height of respective needle
1.
thread guide rods ❶ , and fix the rods with setscrews ❸ .
(Caution) 1. Adjust the lateral position of needle thread
guide base ❷ to 29 mm.
2. When adjusting the height of needle thread
guide rods ❶ , install the rods so that the thread
holes are parallel to the thread holes of silicon
container thread guide ❹ so that excessive re-
sistance is not applied to threads.
2. Adjusting the position of needle thread guide base and silicon
container thread guide
(1) Loosen setscrews ❺ and ❻ and move silicon container thread
guide ❹ up or down to adjust the height.
(2) Loosen setscrew ❼ and adjust the lateral position of needle
thread guide base ❷ .
Results of Improper adjustment
◦ When needle thread guide rod
❶ is raised, needle thread is
loosened.
◦ When needle thread guide rod
❶ is lowered, needle thread is
tightened.
◦ When silicon container thread
guide ❹ is raised, needle thread
is loosened.
◦ When silicon container thread
guide ❹ is lowered, needle
thread is tightened.
◦ When needle thread guide base
❷ is moved to the left, needle
thread is loosened.
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