Adjusting The Rocking Thread Take-Up - JUKI MF-7900 Series Engineer's Manual

(2) Adjusting the rocking thread take-up

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1. Length of the rocking thread take-up
(1) It is the standard that the length of rocking thread take-up ❷ from the center of the shaft of rocking
thread take-up support arm ❹ to the thread hole face of rocking thread take-up ❷ is 83 mm.
2. Position of the rocking thread take-up
(1) Install so that rocking thread take-up ❷ is flush with rocking thread take-up ❷ when the needle bar is
in its lowest position.
Flush
3. Timing of the rocking thread take-up
(1) It is the standard timing that rocking thread take-up ❷ is in its lowest position as well when the needle
bar is in its lowest position.
Timing of rocking thread take-up ❷ is performed by adjusting the position of rocking thread take-up
ball arm ❽ .
4. Relation between the timing of rocking thread take-up and the needle thread loop
(1) When using the excessively stretchable thread or the hard-to-stretch thread, the size of needle thread
loop can be changed by changing the timing of rocking thread take-up ❷ .
(2) Relation between the timing of the rocking thread take-up ❷ and the size of needle thread loop is as
shown in the table on the next page.
Standard adjustment
❷
❶
↑
Anti-operator's side
Operator's side
↓
– 6 –
❹
8 mm