JUKI MF-7900D-H24 Instruction Manual
MF-7900D-H24
INSTRUCTION MANUAL
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CONTENTS
1. SPECIFICATIONS ............................................................................................................................ 1
2. DRAWING OF TABLE (TABLE-FIXED TYPE / V-BELT TYPE) ....................................................... 2
3. DRAWING OF TABLE (TABLE-FIXED TYPE / DIRECT-DRIVE TYPE) .......................................... 3
4. DRAWING OF TABLE (SEMI-SUBMERGED TYPE / V-BELT TYPE) ............................................. 4
5. DRAWING OF TABLE (SEMI-SUBMERGED TYPE / DIRECT-DRIVE TYPE) ................................ 5
6. THREADING THE MACHINE HEAD ................................................................................................ 6
7. ADJUSTING THE SILICON CONTAINER THREAD GUIDE ........................................................... 7
8. ADJUSTING THE ROCKING THREAD TAKE-UP ........................................................................... 7
9. ADJUSTING THE ROCKING THREAD TAKE-UP HOLDER .......................................................... 8
10. INSTALLING THE WASTE CLOTH PIPE ........................................................................................ 8
11. ADJUSTING THE UPPER KNIFE PRESSURE ............................................................................... 9
12. ADJUSTING THE LATERAL POSITION OF THE LOWER KNIFE ................................................. 9
13. ADJUSTMENT PROCEDURE OF ENGAGEMENT AMOUNT OF KNIVES .................................. 10
14. REPLACEMENT PROCEDURE OF UPPER KNIFE AND LOWER KNIFE ................................... 10
15. ADJUSTING THE UPPER KNIFE STROKE ...................................................................................11
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1. SPECIFICATIONS
Model MF-7900D-H24
Class name Covering stitch machine with left hand fabric undertrimmer
(for extra light-weight materials)
Application Hemming of knit and jersey products
Sewing speed Max. 5,000 sti/min (at the time of intermittent operation)
Speed of stitch at the delivery. 4,500 sti/min (at the time of intermittent operation)
Needle gauge 3-needle 5.6 mm, 6.4 mm
2-needle 3.2 mm, 4.0 mm
Differential feed ratio 1 : 0.9 to 1 : 1.6 (stitch length : less than 2.5 mm)
(1 : 0.6 to 1 : 0.9, when the differential link hinge screw is changed)
Micro-differential feed adjustment mechanism is provided. (Micro-adjustment)
Stitch length 0.9 to 3.6 mm
Noise
- Equivalent continuous emission sound pressure level (LpA) at the workstation :
A-weighted value of 79.5 dB; (Includes KpA = 2.5 dB); according to ISO 10821- C.6.2
-ISO 11204 GR2 at 4,000 sti/min.
– 1 –
2. DRAWING OF TABLE (TABLE-FIXED TYPE / V-BELT TYPE)
Z-Z
C
D
(3 locations)
Y-Y
2 - ø 3.4 on the bottom surface, depth 10
D
(Drill a hole at the time of set-up.)
A
B
– 2 –
4 - ø 3.4 on the bottom surface, depth 20
Installing position of drawer stopper
A
(Drill a hole at the time of set-up.)
B
Drilled hole 17
(on the reverse side)
C
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