JUKI MF-7900 Series Engineer's Manual page 135

Adjustment procedures
1. Adjusting the roller presser pressure
(1) Loosen nut ❶ , and turn presser spring regulator ❷ to the right
(clockwise) when increasing the presser pressure.
(2) Turn presser spring regulator ❷ to the left (counterclockwise)
when decreasing the presser pressure.
2. Adjusting the feed amount of the roller
(1) Loosen screw ❸ when adjusting the feed amount of the roller.
• Feed amount is decreased when link ❹ is lifted.
• Feed amount is increased when link ❹ is lowered.
(2) When changing the feed amount further, loosen screw ❺ to
adjust.
• Feed amount is decreased when rod ❻ is lifted.
• Feed amount is increased when rod ❻ is lowered.
Results of Improper adjustment
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