Download
Share
Print this page
JUKI LK-1903C/BR35 Instruction Manual
  1. Manuals
  2. Brands
  3. JUKI Manuals
  4. Sewing Machine
  5. LK-1903C/BR35
  6. Instruction manual
JUKI LK-1903C/BR35 Instruction Manual

JUKI LK-1903C/BR35 Instruction Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
LK-1903C/BR35
INSTRUCTION MANUAL

Advertisement

loading
Need help?

Need help?

Do you have a question about the LK-1903C/BR35 and is the answer not in the manual?

Questions and answers

Related Manuals for JUKI LK-1903C/BR35

Summary of Contents for JUKI LK-1903C/BR35

  • Page 1 LK-1903C/BR35 INSTRUCTION MANUAL...
  • Page 2 CONTENTS I. SPECIFICATIONS ........................1 1. Specifications ..............................1 2. Model classification according to the button size ..................2 3. Shape of buttons ............................2 II. NAME OF EACH COMPONENT ....................3 III. INSTALLATION OF THE SEWING MACHINE AND PREPARATION OF THE OPERATION 4 1. Installation of the table and stand ....................... 4 2. Needle and thread ............................4 3. Attaching the needle .............................
  • Page 3 I. SPECIFICATIONS Different specifications from those of the LK-1900C only are described. 1. Specifications Sewing speed Max. 2,700 sti/min (Normal speed : 2,500 sti/min) Needle bar stroke 45.7 mm Needle DPX17 #14 Lifting lever method Joint use of stepping motor and cam (BR side) Lifting amount of button clamp Max.
  • Page 4 2. Model classification according to the button size Model LK-1903C-311 LK-1903C-312 Button size classification For small-sized buttons For medium-sized buttons Outside diameter of applicable buttons (mm) ø10 - ø15 ø12 - ø18 Length 0 - 3.5 0 - 4.5 Sewing size (mm) Width 0 - 3.5 0 - 4.5 Thickness (mm) Engraved mark Engraved mark...
  • Page 5 II. NAME OF EACH COMPONENT This machine is composed of the following components. Button feeder unit (BR) control panel Sewing machine head Thread stand Power switch Buton feeder Button clamp unit Control panel Table Button loader unit Parts feeder controller (For Europe) Spinner oscillating arm motor knob...
  • Page 6 III. INSTALLATION OF THE SEWING MACHINE AND PREPARATION OF THE OPERATION As for the descriptions other than those described in the following items, refer to the Instruction Manual for the LK-1900C. 1. Installation of the table and stand WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine.
  • Page 7 4. Threading the machine WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. ★ Thread the machine head in the order as shown in the above figure. ( ❶ to  ) Leave thread of approximate 4 cm after passing through the needle. 5. Installing the operation panel cable Refer to the Instruction Manual for the LK-1900C for the installation of the operation panel and cable wiring. Attach cable clip ❶...
  • Page 8 IV. OPERATION 1. Operation of the sewing machine As for the operation of the sewing machine, refer to the Instruction Manual for the LK-1900C. WARNING : • When performing the selection of the pattern or enlargement/reduction of the sewing width, make sure of the needle entry point. If the needle extends outside the button hole or the sewing pattern extends outside the button clamp unit, the needle interferes with the button hole or the button clamp unit during sewing, resulting in the danger of the needle breakage or the like.
  • Page 9 (2) Sewing patterns Number of threads and standard sewing size of X and Y are as shown in the following list. <Sewing program list> Number Standard Standard Number Standard Standard Pattern No. Stitch Pattern No. Stitch of threads sewing size sewing size of threads sewing size sewing size shape...
  • Page 10 3. Operation of the button feeder unit (1) Explanation of the button feeder unit control panel ❼ ❶ ❻ ❷ ❼ ❺ Parts feeder controller (For Europe) ❸ ❹ Symbol and name of switch Function ❶ Power indicator lamp (green) Lights up when the power switch is turned ON. If it fails to light up, check the power plug for secure connection and re-turn ON the power switch. ❷...
  • Page 11 Symbol and name of switch Function ❺ Mode selector switch 1. Automatic sewing mode The sewing machine and the button feeder operate with interlocked. Under this operation mode, depressing the foot pedal lowers the button clamp and makes the sewing machine start sewing a button. When the machine completes sewing of the button, the thread trimmer actuates, then the button feeder actuates to feed next button to be sewn.
  • Page 12 4. Operation (Caution) Move the button clamp jaw levers near to the position of the needle center in advance. 1) Turn ON the power to the main unit of the sewing machine. At this time, the alarm indication on the button feeder unit control panel flashes on and off, and the alarm indication on the button feeder unit control box indicates “0” (flashing). 2) Press the [Ready] key on the sewing machine operation box, and the sewing LED lights up to release the alarm indica- tion on the unit.
  • Page 13 (1) DIP switch function DIP switch DIP switch Function SW1OFF ..○ × △ △ Continuous cycle mode × ○ △ △ Double-stepped action of the button clamp SW2ON ..× × ○ × Adjustment mode SW3ON ..× × × ○ Action without button SW4ON ..
  • Page 14 (2) List of functions and setting of the DIP switch and the digital switch (part 1) Set position of ❸ DIP-SW Prospective button feeding mode (Note 8) Application Automatic sewing mode (Note 3) Applicable to many different • Normal operation function • Normal operation function kinds of button. • Provided with a sensor which detects •...
  • Page 15 DEG, SW-1 DEG, SW-2 Cautions Stitching timing (Note 6) T h e l o n g e s t t i m e d u r i n g w h i c h t h e f i n e (Note 1) The continuous cycle mode is a state where the sewing machine is operated with the pedal held •...
  • Page 16 List of functions and setting of the DIP switch and the digital switch (part 2) Prospective button feeding mode (Note 8) Set position of DIP, SW Application Automatic stitching mode (Note 3) • Normal operation function • Normal operation function Suited to be used exclusive • Provided with a sensor which detects • Prospective button feeding function for point stitching such as completion of fine positioning of a (Not provided with a sensor which...
  • Page 17 DEG, SW-1 DEG, SW-2 Cautions • Length of time during which the button (Note 9) High-speed operating function carrier operates. • This function means that a button always rests on 0 → 0.20 SEC 8 → 0.20 the shutter plate. 1 → 0.50 9 → 0.50 • Since the button carrier operates with the shutter 2 → 0.80 A → 0.80 plate closed, a load is likely to be applied to the 3 → 1.20 B → 1.20 shutter plate and the button carrier when the...
  • Page 18 V. MAINTENANCE 1. Tilting the sewing machine head WARNING : Tilt / raise the sewing machine head with both hands taking care not to allow your fingers to be caught in the head. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. Remove screw ❶ , and slowly tilt the sewing machine head in the direction of arrow. (Caution) 1. The sewing machine has been fixed with screw ❶ at the time of delivery. Normally, use the sewing machine in a fixed state. 2. When tilting the sewing machine, be sure to perform the work at the position of the origin of the button carrier.
  • Page 19 2. Position of the button clamp jaw lever WARNING : When the adjustment of the position is performed, make sure of the needle entry point. If the needle extends outside the button hole or the sewing pattern extends outside the button clamp unit, the needle interferes with the button hole or the button clamp unit during sewing, resulting in the danger of needle breakage or the like. Do not depress the pedal to the second step, during the adjustment, in a state that the sewing LED lights up. The button carrier will actuate by so depressing the pedal. So, be careful. ❹ in the state where sewing 1) Press MODE key LED  goes out on the operation panel. 2) Put "08 Work clamp adjustment"...
  • Page 20 3. Adjusting the feed plate WARNING : When the adjustment of the position is performed, make sure of the shape of the sewing pattern. If the feed plate interferes with the needle hole guide, it will result in the danger of the needle breakage or the like. Also, if the pedal is depressed during the adjustment, the button clamp unit will go up or come down. So, be careful. Do not depress the pedal to the second step, during the adjustment, in a state that the sewing LED lights up. The button carrier will actuate by so depressing the pedal. So, be careful. 1) Put "08 Work clamp adjustment" in the selected state, ❸ ❷ referring to 1) and 2) in "V.2. P o s i t i o n o f t h e b u t t o n clamp jaw lever" p.17.
  • Page 21 5. Adjusting the lifting amount of the button clamp WARNING : Do not depress the pedal to the second step, during the adjustment, in a state that the sewing LED lights up. The button carrier will actuate by so depressing the pedal. So, be careful. ❹...
  • Page 22 6. Adjustment of the pressure of the work clamp unit WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. The pressure of the work clamp unit should be minimized as long as the material does not warp during sewing. Loosen adjusting screw ❶...
  • Page 23 9. Installing the save button bar (accessory part) WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) Install save button bar mounting plate ❸ on button clamp ❷ base ❶ with hexagon screw ❷ . ❶...
  • Page 24 11. Detecting mechanism of the button feeder components and the adjustment WARNING : Perform the work in the state where the sewing LED goes out so as to prevent accidents caused by abrupt start of the sewing machine. Fig. a- ❶ Fig. a- ❷ Triple-pawl dog ❹ ❹ BUT ❶ LED (red) ❼ ❻ BUT ON 1– 1.5 mm Fig. b- ❶ Fig. b- ❷ Fine positioning ❷ sensor dog ❼ ❸ ❺ ❶ RFIN ❺ LED (red) * When the sensor is ON, LED (red) lights up, and when the sensor is OFF, the LED goes out. RFIN ON 1– 1.5 mm (1) Adjusting the button positioning detection switch (BUT) Button positioning detection switch ❶...
  • Page 25 12. Adjusting the feed plate of the index unit WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. 1) Confirm that the index unit is in its origin. Then loosen the lock screw, and remove feed plate A. Loosen screws ❸...
  • Page 26 13. Replacing the button feeder components and positioning them WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. (1) Replacing the button carrier and positioning it To replace the button carrier, loosen screw ❸ , then remove the button carrier. Replace the button carrier with one with a proper center-to-center distance, and fit the button carrier ❶...
  • Page 27 Feed plate Triple-pawl 0.5 mm 0.5 mm Positioning stopper screw 14. Adjusting the vibration of the button feeder 1) Turn ON the power to the device. 2) Set the button feeder adjusting variable resistor ❸ to its ❸ intermediate position. 3) If the feeder does not vibrate adequately, turn sensitivity European specification adjustment variable resistor ❶...
  • Page 28 (2) Selector plate Buttons with their wrong side up are sorted from those with ❶ their right side up when they pass the selector plate. So only ❷ the buttons with their right side up are fed into the index unit. To adjust the selector plate, loosen screw ❶...
  • Page 29 (5) Adjusting the position of the feeder bowl Loosen six lock nuts ❶ in feeder base ❷ , and adjust the height so that the feeder bowl comes above when the difference in level between the outlet of buttons of the feeder bowl and the pan is within 0.5 mm.
  • Page 30 16. How to replace the buttons (on the button feeder side) WARNING : Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine. When change of the shape of the button, change of the sewing pattern or enlargement/reduction of the sewing width is performed, make sure of the needle entry point. If the needle extends outside the button hole or the sewing pattern extends outside the button clamp unit, the needle interferes with the button hole or the button clamp unit during sewing, resulting in the danger of the needle breakage or the like.
  • Page 31 (3) When the outside diameter of button changes Adjust so that buttons in the feeder bowl smoothly flow and the selector plate discriminates the right-sided buttons from ○ the wrong-sided buttons without fail. Adjust the feed plate A in the radial direction. ○ The feed plate A has three holes with different diameters, ●...
  • Page 32 VI. ALARM NO. INDICATION (on the button feeder unit (BR) side) If the alarm indicator lamp on the operation panel starts flashing on and off slowly, the relevant alarm number indicated on the front face of the control box will be shown on the operation panel. Indication Troubles Causes Corrective measures How to reset Normal operation (given during −...
  • Page 33 Indication Troubles Causes Corrective measures How to reset Index unit error (The motor is • Overload of the motor (A Remove the button. Turn off the power, kept turned ON over a prede- b u t t o n i s c a u g h t i n t h e remove the cause, termined period of time.) spinner oscillating arm or...
  • Page 34 VII. TROUBLES AND CORRECTIVE MEASURES IN BR Trouble (Phenomenon) Cause Corrective measures ① Length of needle thread remaining in the 1. Thread slips off the needle • Decrease the tension of the tension at the sewing start. Or, the needle is too short. controller No.
  • Page 35 VIII. OPTIONAL PARTS 1. Kinds of the button carrier For 4-holed button Shape of button carrier Dimension A (mm) Dimension B (mm) Part No. Code Distance between the Diameter of set pin holes in a button Standard type 165-57902 165-90507 165-90606 165-88501 165-88600 165-88709 165-88808 165-88907 Special order type 165-89806...
  • Page 36 25 to 27 mm for adjusting height. × 2 40018337 This is the spacer to install the button spacer (asm.) (Q124) to LK-1903C/BR35. Spacer for Q124 Fix it on the sewing machine table with wood screws supplied with Q124 as ×...
  • Page 37 3. Others Name of part Part No. Application D2426284Y00 Needle hole guide Used when there is no gap between the wrong side of button and the needle hole guide. A=1.6 B=3.5 C=1.1 Button clamp jaw lever asm. for MAZ088220BAA Used when there is no gap between the wrong side of button and the needle thick buttons, left hole guide even when the needle hole guide is replaced with the aforementioned one.
  • Page 38 Name of part Part No. Application Work attachment This work attachment is the same as 18257105 in shape but has a larger bottom 18257204 diameter. (with a recessed end) When replacing the standard work attachment with this work attachment, re-ad- just the fine positioning completion switch.