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JUKI LZ-2280N SERIES Engineer's Manual
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JUKI LZ-2280N SERIES Engineer's Manual

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Summary of Contents for JUKI LZ-2280N SERIES

  • Page 32: Adjusting The Amount Of Oil In The Hook (Ass/-7, Asu/-7)

    (22) Adjusting the amount of oil in the hook (ASS/-7, ASU/-7) Standard Adjustment Race surface Decrease Increase Approx. 1.5 mm Appropriate amount of oil (large) Race surface L-shaped spanner Approx. 0.5 mm Oil splash on a sheet of paper while the machine is operating for 5 Appropriate amount seconds (4,000 rpm)
  • Page 33 Adjustment Procedures Results of Improper Adjustment The amount of oil in the hook can be adjusted with oil amount adjusting screw 1. ™ When oil wick is stained, decrease 1) Adjusting procedure of oil amount in the hook or Turning (clockwise) oil amount adjusting screw 1 increases the oil unstableness of oil amount will amount in the hook and turning (counterclockwise) it decreases the oil result.

  • Page 34: Initial Position Of The Moving Knife

    (24) Initial position of the moving knife Standard Adjustment ™ Moving knife pin 1 should be aligned with marker dot 2. ™ Acceptable range of the position of moving knife is as wide as the marker dot. Marker dot Internal mechanism of thread trimming unit Latch (Rearmost)
  • Page 35 Adjustment Procedures Results of Improper Adjustment 1) Loosen nut 3 in the knife driving arm 7 , and adjust the initial ™ If the initial position of the moving position of the moving knife. knife is not properly adjusted, the Loosen/tighten nut 3 after roller 4 has fitted in the groove on moving knife will fail to cut the the thread trimming cam 8 by pressing roller arm 6 with...

  • Page 36: Installing/Removing The Knife Unit

    (26) Installing/removing the knife unit Standard Adjustment Knife unit Knife unit (27) Stop position of the needle after thread trimming (Needle UP stop) Standard Adjustment ™ The standard stop position of the needle (position at which the marker dot engraved on the machine arm is aligned with the white marker dot engraved on the handwheel) is when the marker line engraved on the thread take-up is aligned with the marker line engraved on the face plate (60˚).
  • Page 37 Adjustment Procedures Results of Improper Adjustment 1) Loosen screw 1 and remove fixing plate 2. 2) Remove screw 3, and the knife unit will come off. Installation is carried out analogously in reverse order. (Caution) When installing the knife unit, take care to allow pin 5 of moving knife (asm.) 4 to securely rest on knife yoke (asm.) 6.