Standard Adjustment; Adjustment Of The Thread Take Up Spring Tension; Adjustment Of The Thread Take Up Spring Swing Stroke - Mitsubishi Electric PLK-G3040R Technical Manual

7. STANDARD ADJUSTMENT

(1) Please make sure to turn the power switch off before adjusting the sewing machine.
(2) When adjusting the sewing machine with the power switch on, please be careful not to step on the
foot switch by mistake.
(3) Please be careful not to be injured by a sharp part such as the needle and the shuttle hook point.
(4) Please make sure to put the safety guards (eye guards, belt guards, link covers, and finger guards or
the others) back on the initial position after the sewing machine adjustment.
7-1. Adjustment of the thread take up spring
tension
(1) Turn to left by half turn the tension bar to loosen
the adjust bushing.
(2) Turn the adjust bushing to adjust the take-up
spring intensity.
Right turns ・・・ Intensified.
Left turns ・・・ Weakened.
Standard tension ・・・ Approx. 2.5 N
To obtain the standard tension, loosen the
adjust bushing, reduce the tension of take-up
spring to 0 and turn the adjust bushing about
1/2 to left from that position.
(3) After the adjustment, turn to right the tension
bar to tighten up.
7-2. Adjustment of the thread take up spring
swing stroke
(1) Slacken the set screw A of thread tension
regulator.
(2) Turn the thread tension regulator to right or left
to determine the operating amount.
(3) After the adjustment, tighten the set screw A.
Right turns ・・・ Intensified.
Left turns ・・・ Weakened.
* Standard operating amount of take-up spring
(distance between the take-up spring and
needle thread guide) is 18 mm.
CAUTION
18mm
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Adjusting bushing
Tension bar
Take-up spring
Take-up spring
Set screw A
Needle thread guide