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Table of Contents
Related Manuals for JUKI UT55
Summary of Contents for JUKI UT55
- Page 1 MF-7900(D)/UT55,56,57 INSTRUCTION MANUAL...
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Page 2: Table Of Contents
IV. AIR PIPING DRAWING....................7 1. Piping of the thread trimmer device (UT57) .................. 7 2. Piping of the thread trimmer device (UT55) .................. 8 3. Piping drawing for air blow (UT56) ....................9 4. Adjusting the air regulator ......................9 V. -
Page 3: Specifications
Looper mechanism Spherical rod drive method Lubricating system Forced lubrication method by gear pump Lubricating oil JUKI GENUINE OIL 18 Oil reservoir capacity Oil gauge lower line : 600 cc to upper line : 900 cc Installation Table-mount type, Semi-submerged type... -
Page 4: Installing The Accessories
III. INSTALLING THE ACCESSORIES WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. 1. Installing the presser lifting cylinder Install presser lifting cylinder asm. -
Page 5: Installation And Setting Sc-921
3. Installation and setting SC-921 (1) Installing the SC-921 on the table ( Table-mount type ) * The instructions apply to the case the control box is installed on the table of the MF-7900(D). To use any other machine head, install the control box on the table referring to the Instruction Manual for the main body of the relevant sewing machine. -
Page 6: Connecting The Cords
(3) Connecting the cords ❷ Loosen screw B in cover ❷ with a screwdriver to open the cover. ❶ Pass cords ❶ of the thread trimming solenoid, reverse-stitching solenoid, etc. and the cord from the motor through hole A in the table to route them down under the machine table. -
Page 7: Setting Procedure Of The Machine Head
Instruction Manual for the machine head of your sewing machine for the type of the machine head. Type of machine head Model name ❶ ❷ ❸ ❹ MF-7900/UT55 MF-7900/UT56 MF-7900/UT57 MF-7900D/UT55 F79d MF-7900D/UT56 MF-7900D/UT57 After selecting the type of machine switch ❶ ( head, by pressing switch ❷... -
Page 8: Setting The Lower Stop Position Of The Needle Bar
(5) Setting the lower stop position of the needle bar Call function setting No. 122. Check to be sure that the lower stop position of the needle bar is as shown in Fig. 1. If not, adjust the lower stop position of the nee- dle bar properly using function setting No. -
Page 9: Air Piping Drawing
IV. AIR PIPING DRAWING WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air supply from air compressor. -
Page 10: Piping Of The Thread Trimmer Device (Ut55)
2. Piping of the thread trimmer device (UT55) ③ ④ ⑨ ⑨ ⑪ – 8 –... -
Page 11: Piping Drawing For Air Blow (Ut56)
3. Piping drawing for air blow (UT56) ③ ④ ⑥ ⑤ ③ ⑤ ③ ① ② 4. Adjusting the air regulator Insert the air hose to air regulator ❶ . ❷ Use the air pressure at 0.4 to 0.5 MPa (4 to 5 kgf/ Draw up regulator knob ❷... -
Page 12: Threading The Machine Head
V. THREADING THE MACHINE HEAD WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. If threading is wrong, stitch skipping, thread breakage, needle breakage or irregular stitches will be caused. -
Page 13: Adjusting The Looper Thread Trimmer Mechanism
VI. ADJUSTING THE LOOPER THREAD TRIMMER MECHANISM WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air supply from air compressor. -
Page 14: Adjusting The Lower Knife
2. Adjusting the Lower knife 1) Set lower knife ❹ and lower knife holder ❺ with setscrews ❻ at the position of the illustration. 3. Adjusting the position of clamp pressure adjusting spring 1) Loosen screws ❾ . 2) Adjust so that a clearance of 2.5 ± 0.5 mm is provided between the top end of clamp pressure ❺... -
Page 15: Initial Position Of The Looper Thread Trimmer Mechanism
6. Initial position of the looper ❹ thread trimmer mechanism When lower knife ❹ is located at its leftmost position, the top end of the lower knife ❹ has to be spaced 22 ± 0.5 mm from the center of needle bar. Center of needle 22 ±... -
Page 16: Adjusting The Longitudinal Position Of The Blade Point Of Lower Knife
Blade point of lower knife is in the 10. Adjusting the longitudinal ❹ center of thickness of looper. position of the blade point of lower knife Bring the needle bar to its highest position. Adjust so that the blade point of lower knife ❹ is in the center of the thickness of looper when the clearance between the right-hand edge of looper 9 mm... -
Page 17: Adjusting The Thread Release Mechanism
VII. ADJUSTING THE THREAD RELEASE MECHANISM WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air supply from air compressor. -
Page 18: Adjusting The Top Covering Thread Trimmer Mechanism
VIII. ADJUSTING THE TOP COVERING THREAD TRIMMER MECHANISM WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air supply from air compressor. -
Page 19: Adjusting The Speed Of Moving Knife
4. Adjusting the speed of moving knife Stroke of air cylinder ❶ is 20 mm. Speed of the moving knife can be changed with speed ❸ controllers ❷ and ❸ . ❷ 1) When you desire to change the protruding speed of moving knife, loosen the nut of speed controller ❷... -
Page 20: Adjusting The Air-Blow Wiper (Ut56)
IX. ADJUSTING THE AIR-BLOW WIPER (UT56) WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air supply from air compressor. -
Page 21: Adjusting The Needle Thread Wiper (Ut55)
X. ADJUSTING THE NEEDLE THREAD WIPER (UT55) WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air supply from air compressor. -
Page 22: Maintenance
XI. MAINTENANCE WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air supply from air compressor.