Adjustment Of The Thread Trimmer; Adjustment Of The Movable Knife - JUKI PLK-J4040R3 Technical Manual

7-6. Adjustment of the thread trimmer

7-6-1. Adjustment of the movable knife

Thread trimmer system is consist of trimmer cam (No.2) and movable knife (No.1) which connected with
link mechanism and fixed knife (No.3). Adjustment of the movable knife (No.1) position is important for
steady trimming function. Please refer to following procedures and adjust the movable knife (No.1) position.
(1) Turn the machine power off. Remove the sliding plate and open the bobbin access door.
How to open the bobbin access door. : Refer to the paragraph <5-4>
How to remove the sliding plate. : Refer to the paragraph <6-2-1>
(2) Insert the hexagon wrench 2.5 (No.4) to the trimmer cam (No.2) and rotate in the arrow direction
(counterclockwise) and move the movable knife (No.1) toward to the needle (No.5). Then turning the
hand pulley and down the needle (No.5) closer to movable knife (No.1) top.
<4>
<1>: Movable knife <2>: Trimmer cam <3>: Fixed knife <4>: Hexagon wrench 2.5
<5>: Needle
<2>
- 38 -
<5>
<1>
<3>