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SunStar KM-380BL, User Manual

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SunStar KM-380BL User Manual Download Page 13

13

5) Routing upper thread

KM-380BL/390BL

Place the thread take-up lever to the highest position and hang
the upper thread like in Figure 14.

[Figure 14]

6) Adjusting upper thread tension

KM-380BL/390BL

A. Adjusting the upper thread tension

- Like in Figure 15, turning the tension adjustment nut

of the thread tension control assembly clockwise makes the upper

thread tension stronger and counterclockwise makes it weaker. 

B. Adjusting the thread take up 

a. Adjusting the thread take up stroke

- As in Figure 15, loosen the stopper fastening screw , and turn the thread take up spring stopper

counter clockwise to

make the operational scope of the thread take up spring 

bigger, and clockwise to make it smaller.

Caution

▶

Turn off the power switch when routing the upper thread.  

If the operator mistakenly presses down on the pedal while switched on, the machine will start

automatically and can cause physical injuries.

▶

When using the clutch motor, be aware that the motor will continue to rotate for a while even

after the power is switched off due to inertia.  

Start to work on the sewing machine only after the motor has come to a complete stop.

[Figure 15]

good swing

when the upper thread tension is strong

when the upper thread tension is weak

Summary of Contents for KM-380BL

Page 1: ...ing machine with vertical large hook KM 390BL 1 needle unison feed lockstitch cylinder bed type sewing machine with horizontal large hook KM 390BL KM 380BL 1 For proper use of the machine thoroughly read this manual before use 2 Keep this manual in a safe place for future reference in case the machine breaks down M MM ME E 0 05 50 06 62 29 9 ...

Page 2: ... functions high performance powerful operation enhanced durability and more sophisticated design to meet a number of user s needs 2 Please read this user s manual thoroughly before using the machine Make sure to properly use the machine to enjoy its full performance 3 The specifications of the machine are subject to change aimed to enhance product performance without prior notice 4 This product is...

Page 3: ...ressure 14 8 Adjusting forward and reverse stitch length 14 9 Adjusting sub presser foot and upper feed presser foot 15 10 Adjusting timing of sub presser foot upper feed presser foot and needle 16 11 Adjusting feed dog height 16 12 Timing of needle plate needle and feed dog 17 13 Adjusting timing of needle and hook 18 14 Adjusting clearance between hook and opener 19 15 Assembling feed cam 19 16 ...

Page 4: ...all be observed strictly Otherwise the user will be killed or suffer severe physical injuries Instructions here must be observed or the user could suffer fatal or severe physical injuries Instructions here should be observed or the user could face physical injuries or mechanical damages Danger The meaning of symbols This symbol means a must not Warning Caution 4 This symbol means that an electric ...

Page 5: ...cal damages such as the machine s dysfunction and breakdown are likely to occur depending on the environment in which the machine is installed the following preconditions must be met ⓐ Please unpack the machine package in order from the upper side Be particularly careful of the nails in the wooden box ⓑ Because machines are apt to be contaminated and corroded by dust and moisture install a climate...

Page 6: ...chine when threading the needle or before checking after sewing ⓗ Do not switch on the power supply with the foot on the pedal ⓘ Do not run the machine when the cooling fan is clogged Be sure to clean the air filter in the control box once a week ⓙ If possible keep the machine away from strong electromagnetic fields like areas around a high frequency welding machine 1 4 Machine Operation Warning W...

Page 7: ...Be sure to wait at least 360 seconds before opening this cover after turn off main switch and unplug a power cord 고압 전류에 의해 감전될 수 있으므로 커버를 열 때는 전원을 내리고 전원 플러그를 뽑고 나서 360초간 기다린 후 여십시오 CAUTION 경 고 Do not operate without finger guard and safety devices Before threading changing bobbin and needle cleaning etc switch off main switch 손가락 보호대와 안전장치 없이 작동하지 마십시오 실 보빈 바늘교환시나 청소전에는 반드시 주전원의 스위치를 꺼 주십시오 CAUT...

Page 8: ...engineer Any electrical wiring must be performed by a qualified technician or agent The machine weighs over 32kg At least 2 persons should carry out the installing work Plug in after the installation is complete If the operator mistakenly steps down on the pedal with the pug in the machine will start automatically and can cause physical injuries Connect the ground earth wire An unstable connection...

Page 9: ...ting or diarrhea Keep out of the reach of children Operate the machine only after adding oil when the machine is being used for the first time or has been left unused for a long time Figure 1 1 Confirming oil supply A Confirming oil tank KM 380BL 390BL In case of oil tank installed in the upper part of arm supply oil to the level of the marked line after opening the cover Refer to Figure 1 2 Lubri...

Page 10: ...10 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 ...

Page 11: ...he lower side c Push the lever so that the pulley touches V belt and operate the machine d When the lower thread is winded thoroughly up to the bobbin the pulley separates automatically from the V belt Refer to Figure 10 3 Adjustment of inserting lower thread KM 380BL 390BL a In case that the lower thread winds up irregularly loosen the screw and adjust it by moving from side to side and tighten t...

Page 12: ... tension to a degree that the thread get loosened by its own weight when you fall the bobbin case grabbing the end of the thread KM 390BL a Removing bobbin Place the needle in the highest position and then like in Figure 12 open the sliding plate and lift the bobbin holder to remove the bobbin b Inserting lower thread Insert the bobbin winded up by thread into the bobbin case As in Figure 13 pull ...

Page 13: ...stopper fastening screw and turn the thread take up spring stopper counter clockwise to make the operational scope of the thread take up spring bigger and clockwise to make it smaller Caution Turn off the power switch when routing the upper thread If the operator mistakenly presses down on the pedal while switched on the machine will start automatically and can cause physical injuries When using t...

Page 14: ...ds when pushing the machine backward or returning it to the original position Due to the weight of the machine your hand can get stuck in the machine if you should slip When adjusting the machine with the switch on be sure to pay extreme caution to the safety Only trained engineers must perform repair or inspection of the machine For electrical repair or inspection always consult with qualified te...

Page 15: ...sting the sub presser foot Loosen the presser bar pressure adjustment screw in Figure 16 on page 14 and the bracket fixing screw in Figure 19 Adjust vertically the bracket fixing screw so that the sub presser foot goes up by 10mm from the upper side of the needle plate when the presser bar lifter is up When the adjustment is finished fix tightly the bracket fixing screw and adjust adequately the p...

Page 16: ...rd 11 Adjusting feed dog height KM 380BL a Bend the machine so that its lower side of bed revealed and adjust the pulley to place the feed dog at the highest point b Loosen the screw and adjust the height by moving vertically the feed dog The standard position of the maximum height of the feed dog is 1mm from the upper side of needle plate c When the height adjustment is complete fasten tightly th...

Page 17: ...ing the screw hold the lower part of the needle bar frame to adjust it to the correct location When the adjustment is finished fasten tightly the screw Figure 23 KM 390BL Locating the feed dog and the needle plate a Loosen the screw in Figure 24 Adjust the location of the feed dog so that the gap between the feed dog and the needle plate before and after the movement is same And adjust the feed do...

Page 18: ...nt Later like in Figure 26 ascend the needle by 2 4mm so that the gap between the upper side of thread hole of the needle and the hook point is adjusted to 2mm by loosening two fixing screws After adjusting the needle and the hook point to be around 0 05 0 1mm by moving the hook from side to side fasten tightly two fixing screws Figure 26 0 05mm 0 1mm 2 4mm 2mm Hook point Thread hole KM 390BL a Pl...

Page 19: ...are coincided as in Figure 30 after placing the thread take up to its highest point Figure 30 so only the pulley of safety assembly rotates idly In case that the safety assembly starts operating during the work turn power switch off and remove causing factors of load Later with safety button pressed turn the pulley to place the driving ball of safety assembly to its original position Adjust the in...

Page 20: ...ng of feed dog Bad timing of needle and hook Bad timing of needle and hook Bad timing of needle and hook Wrong threading Bent needle or broken needle tip Needle inserted in the wrong position Too tight upper thread tension Too loose lower thread tension Loose upper thread Upper and lower thread tensions are bad Thread take up spring tension is inadequate The gap between the opener and hook is inad...

Page 21: ... inserted correctly Scratch and abrasion of movable and fixed knives The timing of trimming cam is wrong Thread release stroke is too small Wrong trimming timing The opening on the thread tension control plate is too small Too strong tension on the auxiliary thread tension control assembly Thread take up stroke is too large Volume is adjusted to too low Direction of the needle Blade side of movabl...

Page 22: ...22 5 Table Drawing 1 KM 380BL ...

Page 23: ...23 2 KM 380BLB ...

Page 24: ...24 3 KM 390BL ...

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