Adjustment Of The Thread Take Up Spring; Adjusting Movable Range Of The Thread Take Up Spring; Adjusting Intensity Of The Thread Take Up Spring - Mitsubishi Electric PLK-J2516-YU Technical Manual

6-9. Adjustment of the thread take up spring

6-9-1. Adjusting movable range of the thread take up spring

(1) To adjust the thread take up spring (No.1), loosen the stopper stop screw (No.2) and move the
stopper (No.3). When moved the stopper (No.3) in the arrow direction, movable range of the thread
take up spring (No.1) is increased.
(2) After adjustment tighten the stopper stop screw (No.2).
NOTE Standard stopper (No.3) position is showing in following figure. The take up spring (No.1) position
is set to be the almost same height of the center line <A> of the thread take up spring unit (No.4).
<3>
<2>
<1>: Thread take up spring <2>: Stopper stop screw <3>: Stopper <4>: Thread take up spring unit

6-9-2. Adjusting intensity of the thread take up spring

(1) Loosen the lock nut (No.1) and turn the adjusting shaft (No.2) with screw driver. When the adjusting
shaft (No.2) won't screw well, loosen the set screw (No.3) slightly. When tightening the screw driver
clockwise, the thread take up spring tension becomes loose, and when loosening the screw driver
counterclockwise, the thread take up spring tension becomes tight.
(2) After adjustment, tighten the lock nut (No.1).
<3>
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
<A>
<1>
Loose
<1>: Lock nut
<2>: Adjusting shaft
<3>: Set screw
Tight
<4>: Thread take up spring unit
<2>
<1>
- 34 -
<4>