SunStar KM-857J Series Скачать руководство пользователя страница 38

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Symptom

Checkpoints

Root cause

Corrective action

After trimming, lower thread holder
does not hold the lower thread

Due to problems in the up-stop
position of the needle, the thread
take up lever pulls the upper thread
out of the needle when the sewing
starts

The upper thread oil felt is pressing
the thread too strongly.

The height and distance between
the movable knife and the hook do
not match

Tension and contact of movable
and fixed knives are bad

Needle is not 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

Adjust the location and tension of
the lower thread holder.

Readjust the needle’s up-stop film
position

Adjust the felt tension

Readjust the movable knife setting
position

Correct the tension adjustment and
surface contact of movable and
fixed knives.

Insert the needle correctly

Replace movable knife or fixed
knife.

Adjust the timing of trimming cam

Readjust the thread release stroke

Adjust the trimming timing

Adjust the thread release stroke

Adjust the tension of the auxiliary
thread tension control assembly

Adjust the thread take up spring’s
stroke

Increase the volume adjustment.

Lower thread holder

Check the up-stop
position of the needle

Check the oil felt
tension of upper
thread

The gap between the
movable knife and
the hook

Check the tension of
fixed knife

Direction of the needle

Blade side of movable
and fixed knives

Trimming cam timing

Thread release stroke

Trimming timing

Opening of the thread
tension adjusting plate

Tension of auxiliary
thread tension
adjustment assembly

Thread take up stroke

Thread release
adjustment volume
on the control box

Upper thread
falls out when
starting to sew
or sewing is
skipped.

Trimming miss

Too short
thread length
after trimming

Remaining upper
thread length after
trimming

The length of the remaining upper
thread is too short

Increase the adjustment volume of
the upper thread on the control box

Содержание KM-857J Series

Страница 1: ...USER S MANUAL KM 857J SERIES R High Speed Post Bed 1 Needle Needle Feed Lock Stitch Machine with Thread Trimmer for Reinforcement Stitch of Jean ...

Страница 2: ...e 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 designed manufactured and...

Страница 3: ...ne automatic trimming type 15 12 Installing the Attachment for Reinforced Stitches KM 857J Series 16 3 Adjustment of the machine 1 Inserting needle 17 2 Removing bobbin and bobbin case 17 3 Winding lower thread 18 4 Routing lower thread 18 5 Inserting bobbin 19 6 Routing upper thread 19 7 Adjusting thread tension 20 8 Adjusting height and pressure of the presser foot 22 9 Adjusting needle and feed...

Страница 4: ...here shall be observed strictly Otherwise the user may be killed or suffer severe physical injury Instructions here must be observed or the user may suffer fatal or severe physical injury Instructions here should be observed or the user may face physical injury or mechanical damages Danger The meaning of symbols This symbol means a must not This symbol means a must for safety This symbol means tha...

Страница 5: ...bstacles 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 Be careful of the nails in the wooden box ⓑ Because machines are apt to be contaminated and corroded by dust and moisture install a climate controller and clean the machines regularly ⓒ Keep the machine out of...

Страница 6: ...g the needle or before checking after sewing be sure to stop the machine ⓗ Don t switch on the power supply with the foot on the pedal ⓘ Don t 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 high frequency welding machine 1 4 Machine Operation Caution Caution ⓐ...

Страница 7: ...e 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 CAUTI...

Страница 8: ...857J KM 857J 7 Purpose Max sewing speed Max no of stitches Needle bar stroke Feed dog height Post height Needle used Feeding method Needle width gauge Medium material heavy material 3 000SPM 5mm 33 4mm 1mm 7mm 15mm 178mm DP 17 18 14 22 Low pressure circular automatic feeding 1 16 1 1 6mm 25 4mm 3 Specifications of servo motor controller trimming type KM 857J 7 Model type Item Presser foot height M...

Страница 9: ...Available in two types SEDG 1B for edge sensing type and SEDG 2B for thickness sensing type A device needed when only one operator runs several sewing machines Pedals for acceleration thread trimming presser foot and ascending are built separately There are two types SPDL 1 for fixed speed type and SPDL 2 for adjustable speed type SPF 3A A solenoid operating structure where the presser foot gets l...

Страница 10: ... hinge rubber and cushion rubber are inserted see figure 1 2 Installation of knee lifting solenoid and power switch box 1 When attaching the power switch box refer to figure 2 to make sure that it is placed at the very center of the solenoid bracket 2 After attaching the solenoid onto the table unfasten the screw to adjust the center of middle linking bar and the center of solenoid shaft in parall...

Страница 11: ...t use safety goggle or gloves to prevent the lubricant from coming into contact with the eyes or skin This may cause inflammation And never drink lubricants They may cause vomiting or diarrhea Please keep out of the reach of children Make sure to supply oil when using it for the first time or after not using it for a long time 4 Lubrication 1 Oil tank check As in figure 4 pour the oil into the oil...

Страница 12: ...using of the horizontal push stick can be adjusted using the adjustment screw of the oil supply terminal The amount of oil supply decreases when turned clockwise and increases when turned counterclockwise see figure 6 4 As test operation run the machine for 10 minutes at about 1 500 SPM For the first 4 5 days of using the machine operate the machine at less than 2 400 SPM per minute Then start usi...

Страница 13: ...fix the bracket where the program unit has been attached along with the back cover see figure 8 Figure 8 7 Installation of belt cover 1 Attach belt cover A onto the back of the machine body as seen in figure 9 2 As seen in figure 10 assemble the belt cover support pin to the arm base and then attach the belt cover B to the machine Now if a bobbin winder is attached on the table lay down the machin...

Страница 14: ...ure 12 Then following the figure 13 make adjustments to place the photo film at the center of the sensor housing by moving the shaft to the right and left Then tighten the 2 fixing screws using the hexagonal wrench Note A As seen in figure 12 make sure that the marks DOWN and UP face the front when looking from the pulley side B Film adjustment is completed upon shipment Figure 12 DOWN UP Figure 1...

Страница 15: ...es place immediately If the machine is stopped first and the button is pressed before stepping the pedal to start the machine reverse sewing will take place from the start Also by pressing button while the machine is in stop position the high low position of the needle bar can be changed If the button is pressed once when the needle bar is in down stop position the needle bar changes to up stop po...

Страница 16: ...mble the post cover 2 Replace the feed dog for reinforcement stitch and assemble the post cover again 3 Install the needle plate for reinforcement stitch and the presser foot for reinforcement stitch 4 Use the post cover and assemble the attachment for reinforcement stitch Figure 19 ...

Страница 17: ...ower supply due to inertia Make sure to start working only after the motor has come to a complete stop 1 Inserting needle As in figure 19 place the upper end of the needle closely adhered to the upper side of the stopper hole with the needle groove facing inward Fix the needle with a fixing screw Figure 19 2 Removing bobbin and bobbin case Place the needle in the highest position and then just lik...

Страница 18: ...when the nut is turned clockwise and drops when turned counter clockwise Figure 21 Caution When adjusting the tension of the lower thread be sure to switch off the power supply If the user steps on the pedal by mistake the machine will start automatically and this might lead to physical injuries When using the clutch motor remember that the motor revolves for a while even after switching off the p...

Страница 19: ...pper thread like in figure 23 The adequate length of upper thread extending from the needle hole is 50mm for initial sewing Figure 23 Caution When taking up the upper thread be sure to switch off the power supply If the user steps on the pedal by mistake the machine will start automatically and this might lead to physical injuries When using the clutch motor remember that the motor revolves for a ...

Страница 20: ...trol assembly clockwise makes the upper thread tension stronger and turning counterclockwise makes it weaker Figure 24 2 Adjusting the lower thread tension Like in figure 25 turning the tension adjustment nut of the hook clockwise makes the lower thread tension stronger and turning counterclockwise makes it weaker Figure 25 strong weak weak strong strong weak Good sewing Strong upper thread tensio...

Страница 21: ...p spring tension is normally 50 80g Figure 26 5 10mm small large 50 80g weak strong 4 Adjusting the thread release stroke automatic trimming type If the upper thread falls out from the needle hole after trimming check whether the plate opens while the trimming is in action For the adjustment of plate opening level put the solenoid in action and adjust by moving solenoid collar back and forth to ma...

Страница 22: ...d the lower side of the presser foot 7mm Then tightly fasten the bracket clamp screw See figure 29 Be careful not to turn the presser bar 2 Adjusting the tension of the presser foot Turning the pressure adjustment screw to the right increases the presser foot tension and turning it to the left makes it weaker After adjusting make sure to tighten the fixing nut See figure 29 Caution Be sure to plac...

Страница 23: ...ustment when the feed dog comes up from below the needle plate and the upper side of the feed dog meets the upper side of the needle plate check to see if the needle descends and the needle point stops at about 3 4mm distance from the upper side of the needle plate as can be seen in the figure See figure 30 10 Adjusting height of the feed dog Turn the pulley to place the feed dog in the highest po...

Страница 24: ...needle bar holding screw adjust so that the needle bar carved sign ⓐ meets the end of the frame ⓑ like in figure 32 then tighten the screw ⓐ ⓑ 1 8mm 1 8mm Figure 33 2 Adjusting the timing of hook edge and needle center crossing First set the stitch length DIAL to 2 5mm Adjust the hook gear clamp screw so that like in figure 33 the hook edge fall sexactly at the center of the needle center when the...

Страница 25: ...1 1 2mm This distance may impact the thread separation during sewing adjustment and trimming hence it must be checked If the distance is not as recommended it has to be adjusted by moving the hood base bushing up and down as seen in figure 36 Make sure the adjustments are made after carefully observing the assembled position of the peripheral parts The hook base bushing is fixed in one position by...

Страница 26: ...eedle plate E Unfasten 2 of the feed dog fixing bolts for about 3 cycles F Using a driver lift the feed dog and take it out 2 Feed dog replacement method for KM 867 series is very simple as they have adopted the quick change type structure Please refer to the following explanation and figure 39 Assembling can be done in the reverse order Make sure that the feed dog is securely inserted before tigh...

Страница 27: ...to its original position The load in which the safety device gets activated can be adjusted by turning the adjusting screw clockwise for large load and left for small load See figure 40 16 Adjusting trimming device 1 Adjusting the trimmer driving part A Fixing the position of the trimming cam See figure 41 a Turn the pulley manually to place the needle bar at its lowest position b With the left si...

Страница 28: ...l point of the stopper pin adhere smoothly to the inner left side of the stopper pin holder Once this is done tightly fasten the fixing screw ⓑ Once such adjustments are made the trimmer shake linkage will not move even when shaken to its sides the roller is inside the cam Make sure to check if the shake linkage returns to up position quickly and smoothly when released If not proceed with horizont...

Страница 29: ...ovable knife shaft right hold the initial assembling angle of the crank right to be about 27 to the left from the perpendicular line drawn to its center To make sure that this position is maintained adjust the length of the ball joint linking bar and tightly fasten the fixing screw of the crank right For the adjustment of the ball joint linking bar turn the linking bar after loosening the nuts lef...

Страница 30: ...xed knife See figure 46 a Like in figure 46 manually operate the movable knife and then slowly reposition it in its original place Now just like in the figure place the fixed knife so that the fixed knife edge touches 3mm before the movable knife s trimming point b Match the upper side of the fixed blade and movable knife Fully adhere the upper and lower parts of the fixed blade edge with the oute...

Страница 31: ...line of the figure After the adjustment is made tightly fasten the left and right crank fixing screws d When willing to adjust only slightly the initial position of the left and right movable knives use the ball joint linking bar If only the left movable knife is to be slightly adjusted then use the linking bar The standard initial assembling position of the movable knife is where the movable knif...

Страница 32: ... seen in part Figure 49 Figure 50 4 Checkpoints on the assembling status of other trimming devices A Check the starting point of the movable knife when the trimming action takes place Operate the trimming action manually to check whether the thread take up lever is about 10mm higher than its lowest point when the movable knife starts working as in figure 49 B Maintenance of fixed blade When the th...

Страница 33: ...n up stop position up stop needle position of the control after trimming 2 Set the stitch length dial at 2 3 When pressing with hand as in the above picture the wiper edge should protrude about 0 3 mm from the needle edge Loosen the four clamp screws to vertically adjust the solenoid 4 Route the thread onto the two needles 5 The position of the wiper edge should look like the picture where the two...

Страница 34: ...ses where the thread cannot be routed to the wiper edge Hence it is necessary to bring the wiper into the range of the needle where the thread from the sewing material can be routed Make sure that the needle fixing screw does not get in the way of the wiper 7 The trace of wiper edge is as the above picture Adjust the wiper edge by loosening the clamp screw and vertically adjusting the distance bet...

Страница 35: ...e need to be readjusted To do so loosen the screws make the adjustment and then fasten them back Caution Turn off the power switch 1 Open the hook cover 2 Remove the needle 3 Disassemble the needle holder Turn it towards the arrowed direction for removal KM 867 series 4 Lift the presser bar lifter to raise the presser foot 5 Disassemble the presser foot 6 Disassemble the needle plate 7 Disassemble...

Страница 36: ...6 20 Adjusting the Attachment for Reinforcement Stitch KM 857J Series Loosen the screws on the reinforcement stitch guide 4EA and adjust the distance of the guide according to sewing materials Figure 55 ...

Страница 37: ...a scratch on the hook edge There is a scratch on the needle hole of the feed dog There is a scratch on the thread case and around the needle plate Upper and lower thread tensions are bad Thread take up spring tension is inadequate The gap between the opener and hook is inadequate Needle is inserted into wrong position Bent needle Wrong direction The timing between the needle and hook is bad Needle...

Страница 38: ...ition Correct the tension adjustment and surface contact of movable and fixed knives Insert the needle correctly Replace movable knife or fixed knife Adjust the timing of trimming cam Readjust the thread release stroke Adjust the trimming timing Adjust the thread release stroke Adjust the tension of the auxiliary thread tension control assembly Adjust the thread take up spring s stroke Increase th...

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