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UUKI 1 -Needle, Bottom Feed & Variable Top Feed Double-chain Stitch Machine with Automatic Thread Trimmer MH-486-4 ENGINEER’S MANUAL No. П-5 1984. 2 KoMnaHMA „KpyHr" Te^./^aKc: (495) 989-22-97 CONTENTS 1. SPECIFICATIONS .................................................... ............. , 2. STANDARD ADJUSTMENTS...................................................... _ _ 2 (1) Height of the needle- bar . .................................................... 2 (2) Timing of the needle and the looper .................................................. 'ii (3) Height and tilt of the-feed dog......................................, , . ,....... ... 4 (4) Feed timing .................................................................... 4 (5) Timing of the thread spreader with respect to the needle.........................................4 (6) Positioning the needle guard and the loop guide .............................................. (7) Tuning of the looper thread take-up ............................................... . g (8) Positioning the frame thread eyelet ................. ......; ........... $ (9) Positioning the thread spreader .....................................................jq (10) Positioning the safety cam and the safety roller..................................... ......ip (11) Dimensions and. moun ting position of the counter knife ....................................59 (12) Positioning the moving knife.........................................................1-j (13) Stroke of the moving knife......................................................14 (14) Adjusting the wiper .............................................................14 (15) Amount of the looper thread to be drawn out............................................_ |g (16) Clamping pressure applied by the needle thread clamp.......................................; (3 (17) Adjusting the needle thread draw-out solenoid component .................................... 18 (18) Stop angle at the time of thread trimming ..............................................¡8 (19) Relation, between the top-feed indicating plate (scale) and the pointer .............................20 (20) Actual top-feed amount when the top feed adjusting dial is set t.o the maximum figure ....................20 (21) Timing of the vertical motion of the walking foot...........................................20 (22) Timing of the. horizontal motion of the walking foot . ............................................2? (23) Longitudinal position of the walking foot ................................................ (24) Pressure of the presser foot.......................................................~j¿ (25) Positioning the PF-3 mt.ermit.ten t gathering stopper..........................................74' 3. OTHER IMPORTANT POINTS....................................................., . 2f, (f) Function of the iooper thread guide base..................... ............ ..................26 (2) Thread trimming in reverse stitching ................. ................................26 (3) Condensation stitch ...............................................................27 (4) Thread trimming in condensation, stitching ................................................27 (5) Needle thread clamp ..........................................................-yj (6) Timing of each solenoid ........................................................or 4. HOW TO DISASSEMBLE AND REASSEMBLE THE MACHINE ................ .....................?9 (1) Top feed mechanism In the face plate.........................................................~f.i (2) Adjusting the top feed mechanism .............................................<7 (3) Disassembling and assembling the top feed driving mechanism ......... . .........................'¡5 (4) How to remove excessive play ami jarring ..............................................1,9 (5) How to adjust the walking foot drive mechanism ....................................4; 5. TROUBLES AND CORRECTIVE MEASURES (MECHANICAL COMPONENTS).........................44 KoMnaHMA „KpyHr" Te^./^aKc: (495) 989-22-97 1, SPECIFICATIONS I Model MH-486-4 2 Name of machine 1-Needle, Bottom Feed & Variable Top Feed Double-chain Stitch Machine with Automatic Thread Trimmer 3 Sewing speed Max. 4500 s.p.m. 4 Stitch length Max. 5 mm (0.197") 5 Max. reverse feed stitch length 5 mm (0.197") (Condensation stitch available) 6 Needle ORGAN TV x 7 #9 ~ #21 (SCHMETZ 145 x 7 #65 ~ #130) 7 Lift of presser fool; 5. 5 mm (0.217") by hand lifter (7 mm (0.276") by knee lifter) 8 Top feed amount 0 to 7 mm (0" 0.276") 9 Needle bar stroke 33 mm (1.299") 10 Thread take-up stroke 33 mm (1.299") (needle bar thread take-up) 1 i Looper drive system Driven by tilting crank 12 Looper stroke 21.5 mm (0.847") 13 Looper avoiding stroke 3.2 mm (0.126") 14 Needle guard stroke 3 mm (0.118") (movable needle guard) 15 Lo...