Table of Contents
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Table of Contents
Related Manuals for Janome 634D
Summary of Contents for Janome 634D
- Page 1 SERVICING MANUAL MODEL 634D...
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Page 2: Table Of Contents
INDEX TO CHANGE FACE PLATE UNIT ......................1 TOP COVER UNIT ......................2 BELT COVER UNIT ......................3 TENSION COVER UNIT ....................4 FRONT PANEL UNIT ......................5 SIDE COVER UNIT ......................6 MACHINE BASE ......................... 7 MACHINE SOCKET ......................8 TO ADJUST NEEDLE BAR HEIGHT ...................... -
Page 3: Top Cover Unit
TO CHANGE THE TOP COVER UNIT To remove: 1. Loosen two screws (A) through hole of tension thread guide plate (B), and remove the top cover (C). To attach: 2. Put the ribs (D) in tension cover unit (E), and tighten the setscrews (A). -
Page 4: Belt Cover Unit
TO CHANGE THE BELT COVER UNIT To remove: 1. Open the looper cover unit (A). 2. Loosen set screw (B) and remove the setscrew (C). 3. Remove the belt cover unit (D). To attach: 4. Put the ribs (E & F) in front panel unit (G) and tension cover unit (H), and tighten setscrews (B &... -
Page 5: Tension Cover Unit
TO CHANGE THE TENSION COVER UNIT To remove: 1. Remove face plate unit and belt cover unit. 2. Remove setscrews (A & B), and remove tension cover unit (C). To attach: 3. Put rib (D) in front panel unit (E), and tighten the setscrews (A & B). 4. -
Page 6: Front Panel Unit
TO CHANGE THE FRONT PANEL UNIT To remove: 1. Remove the face plate unit, belt cover unit and tension cover unit. 2. Move the upper looper (F) to its lowest position by turning the balance wheel in counterclock- wise. 3. Remove set screws (A, B, C, D & E), and remove the front panel unit (G). To attach: 4. -
Page 7: Side Cover Unit
TO CHANGE THE SIDE COVER UNIT To remove: 1. Loosen setscrew (A) and remove the side cover unit (B). To attach: 2. Fit the U-groove (C) in the side cover unit (B) between the setscrew (A) and set plate (D). 3. -
Page 8: Machine Base
TO CHANGE THE MACHINE BASE To remove: 1. Remove the screws (A, B, C, D & two hinge screws E), and remove the base cushions (F). 2. Remove the machine base (G). To attach: 3. Attach the machine base (G), and tighten the screws (A, B, C & D). 4. -
Page 9: Machine Socket
TO CHANGE THE MACHINE SOCKET To remove: 1. Remove the belt cover. 2. Remove the two setscrews (G), and pull out the cord connectors (A, B, C & D). To attach: 3. Insert the cord connectors (A, B, C & D) as shown below. Connectors: A: Blue for motor B: Brown for motor... -
Page 10: Needle Bar Height
TO ADJUST THE NEEDLE BAR HEIGHT The distance between the tip of needle on the right and the surface of needle plate (B) should be between 11.2 and 11 .6 mm when the needle bar (C) is at the highest position. To adjust: 1. -
Page 11: Presser Bar Height
TO ADJUST THE PRESSER BAR HEIGHT The distance between the surface of needle plate (C) and bottom of presser foot should be between 4.7 and 5.3 mm (47/254 and 53/254”) when the presser bar lifter (D) is raised. To adjust: 1. -
Page 12: Feed Dog Height
TO ADJUST THE FEED DOG HEIGHT When the presser foot is lowered and the feed dogs•i A •• B•j are at their highest position, the distance between the surface of needle plate (C) and bottom of presser foot should be between 0.75 and 0.95 mm. -
Page 13: To Adjust
TIMING OF NEEDLE AND FEED DOG When the tip of right needle is at 2 mm (J) above the needle plate in its downward motion, and lowered presser foot, the top of the feed dog teeth (K) should be leveled with the top surface of needle plate (L) at the end of feed movement (M). -
Page 14: Tension Of Sub Thread Tension Dial
TO ADJUST THE TENSION OF SUB THREAD TENSION DIAL After adjustment of the thread tension for 4 thread overlock sewing, slide the slide lever (C) from “STD” position to “ R. H.” position without turning the thread tension dials. Make sure the sliding thread guide (D) is set at “3/4”... -
Page 15: Needle And The Upper Knife Timing
TO ADJUST THE NEEDLE AND THE UPPER KNIFE TIMING When the needle bar is at its highest position the upper knife should be also at its highest posi- tion. To adjust: 1. Remove the feed base cover. 2. Loosen the two setscrews (A) and remove the balance weight (F). 3. -
Page 16: Stitch Length
TO ADJUST THE STITCH LENGTH The actual stitch length should be 2.8 to 3.0 mm when the stitch dial is set at “3”. To adjust: 1. Set the stitch length dial (C) at “3” and the differential feed dial (D) at “1.0”. 2. -
Page 17: Clearance Between Needle And Lower Looper / Needle Guards
TO ADJUST THE CLEARANCE BETWEEN EEDLE AND LOWER LOOPER I NEEDLE GUARDS When the tip of lower looper (G) comes from the left just behind the needle (I) on the left or right, the clearance between both needles and lower looper (G) should be between 0 and 0.1 mm. In this condition, the clearance between both needles and rear needle guard (H) should be between 0 and 0.2 mm. -
Page 18: Clearance Between Needle•@ And Fixed Needle Guard
TO ADJUST THE CLEARANCE BETWEEN NEEDLES AND FIXED NEEDLE GUARD The clearance between needle (B) and the fixed needle guard (C) should be 0.1 to 0.4 mm (D). To adjust: 1. Remove the foot and the needle plate and lower the needle to its lowest position. 2. -
Page 19: Position Of Chaining Finger
TO ADJUST THE POSITION OF CHAINING-OFF FINGER When set the needle plate stung knob (E) at guide line “S”, chaining-off finger (B) should touch with the side of needle plate (C) and tip of chaining-off finger should be at the same level as the tip pin of the needle plate (D). -
Page 20: Needle And The Lower Looper Timing
TO ADJUST THE NEEDLE AND THE LOWER LOOPER TIMING When the needle comes up 1.4 to 1.8 mm (A) from its lowest position, the tip of lower looper (B) comes just to left side of left needle (C) on the left. To adjust: 1. -
Page 21: Position Of Upper Looper
TO ADJUST THE POSITION OF UPPER LOOPER When the upper looper (A) is at the leftmost position, the distance between the center of needle on the right and the center of looper eye should be 4.8 to 5.2 mm (B). To adjust: 1. -
Page 22: Upper & Lower Looper Timing
TO ADJUST THE UPPER & LOWER LOOPERS TIMING When lower looper (C) moves to the right, the lower looper (C) meets the upper looper (D) within 1 mm (J) from the left of lower looper eye at a right angle as shown in **E**. To adjust: 1. -
Page 23: Clearance Between Loopers
TO ADJUST THE CLEARANCE BETWEEN LOOPERS When the loopers meet as shown in **B**, the clearance should be between 0 and 0.2 mm (D) as shown in **A**. To adjust: 1. Remove the spreader setscrew (E) and the spreader holding plate (F). 2. -
Page 24: Clearance Between Needle•@ And Upper Looper
TO ADJUST THE CLEARANCE BETWEEN NEEDLE AND UPPER LOOPER When the upper looper (A) meets with needle, clearance (C) should be: * 0.1 to 0.15mm at the needle on the left. * 0.2 to 0.05 mm at the needle on the right. To adjust: 1. -
Page 25: Position Of Knives
TO ADJUST THE POSITION OF KNIVES The tip of the lower knife (A) should be leveled with the surface of needle plate (B). When the upper knife (C) is at the lowest position, the front lower corner of upper knife should be 0.8 to 1.5 mm (D) below the edge of lower knife. -
Page 26: Position Of Lower Looper Thread Guide
TO ADJUST THE POSITION OF LOWER LOOPER THREAD GUIDE Lower Looper Thread Guide (E) Loose the set screw (A), and adjust the lower looper thread guide (D) so that the hole of thread guide (E) is in line with the groove of lower looper (G) as shown in **F**. Looper Thread Guide (Lower) Loosen the setscrew (B) and set so that the bottom side of the looper thread guide (D) is in line with the bottom side of the upper looper vibration arm (C). -
Page 27: Thread Tention Dial
TO ADJUST THE THREAD TENTION DIAL When each dial is set at “3” and No. 50 polyester filament thread (C) is used, the thread tension should be as follows; Needle (Left) 25 - 35 g Needle (Right) 15 - 25 g Upper looper 10 - 20g Lower looper 20 - 30 g When each dial is set at “9”...
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