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54

Troubleshooting

Condition

Cause

Reference

The needle thread 

breaks

1.  The needle thread is not threaded properly.
2.  The needle thread tension is too tight.
3.  The needle is bent or blunt.
4.  The needle is incorrectly inserted.
5.  The needle threads is not set under the presser foot when start 

sewing.

6.  The thread is either too heavy or too fine for the needle.

Page 18
Pages 11-12
Page 14
Page 14
Page 21 

Page 14

The bobbin thread 

breaks

1.  The bobbin thread is not threaded properly in the bobbin holder.
2.  Lint has collected in the bobbin holder.
3.  The bobbin is damaged and does not turn smoothly.
4.  The thread is wound loosely on the bobbin.

Page 17
Page 52
Change the bobbin.
Page 16

The needle breaks 1.  The needle is incorrectly inserted.

2.  The needle clamp screw is loose.
3.  The threads were not drawn to the rear after sewing.

4.  The needle is too fine for the fabric being used.

5.  An inappropriate presser foot is used.

Page 14
Page 14
Page 21
Page 14
Use the correct 

foot.

Skipped stitches

1.  The needle is incorrectly inserted, bent or blunt.
2.  The needle and/or threads are not suitable for the work being sewn.

3.  A blue tip needle is not being used for sewing stretch, very fine 

fabrics and synthetics. 

4.  The needle thread is not threaded properly.

5.  A poor quality needle is used.

Page 14
Page 14
Use the stretch 

stitch needle.
Page 18
Change the needle.

Seam puckering

1.  The needle thread tension is too tight.
2.  The needle thread is not threaded properly.
3.  The needle is too heavy for the fabric being sewn.
4.  The stitch length is too long for the fabric.

5.  A stabilizer is not used when sewing very fine fabrics.

Pages 11-12
Page 18
Page 14

Make stitch shorter.

Apply a stabilizer.

The fabric is not 

feeding smoothly

1.  The feed dog is packed with lint.

2.  The stitches are too fine.

3.  The feed dog is not raised after “drop feed” sewing.

Page 52

Make stitch longer.

Page 13

Loops on the 

seams

1.  The needle thread tension is too loose.

2.  The needle is too thick or too fine for the fabric.

Page 11-12
Page 14

The machine does 

not work

1.  The machine is not plugged in.
2.  Thread has been caught in the hook race.
3.  The bobbin winder spindle is not returned to the left after bobbin 

winding.

Page 6
Page 52
Page 16

Buttonhole sewing 

is not sewn 

properly

1.  The stitch density is not suitable for the fabric being sewn.
2.  The interfacing has not been used for the stretch or synthetic fabric.
3.  The buttonhole lever is not lowered.

Page 32
Apply an interfacing.
Page 31

The machine is 

noisy

1.  Thread has been caught in the hook race.
2.  Lint has built up in the hook race or bobbin holder.

Page 52
Page 52

Summary of Contents for M100QDC

Page 1: ...Instruction Book...

Page 2: ......

Page 3: ...grasp the plug not the cord 10 Keep fingers away from all moving parts Special care is required around the sewing machine needle and or cutting blade 11 Always use the proper needle plate The wrong pl...

Page 4: ...22 Sewing from the Edge of Thick Fabric 22 Using Seam Guides 22 Turning Square Corners 22 Altering the Needle Drop Position 23 Altering the Stitch Length 23 Lock a matic Stitch 24 Locking Stitch 24 T...

Page 5: ...er foot pressure dial Thread take up lever Lower thread guide Needle clamp screw Needle Presser foot Hook cover release button Hook cover plate Thread cutter Needle plate Feed dogs Foot holder Setscre...

Page 6: ...t C Spool holder x 2 large 1 set on the machine Spool holder x 2 small Extra spool pin Bobbins x 4 1 set on the machine Needle set Seam ripper Buttonhole opener Lint brush Screwdriver Stitch chart Ins...

Page 7: ...stitch chart q w e r You can flip the chart to the back of the machine when it is not in use Large Extension Table Attaching the table Pull the table away from the machine Spread the legs of large ex...

Page 8: ...lug in any way GETTING READY TO SEW Connecting the Power Supply Using the foot control Turn off the power switch Insert the pin connector into the jack Insert the machine plug into the power inlet Ins...

Page 9: ...into the holes until the table snaps into the machine w Free arm e Guide r Hole Accessory storage Accessories are stored inside the extension table Pull the lid toward you to open the accessory storag...

Page 10: ...7 08 or 55 is selected Press the auto lock button to sew a locking stitch immediately The machine will automatically stop When any other stitches are selected Press the auto lock button to sew a locki...

Page 11: ...ber q Arrow keys first digit w Arrow keys second digit e First digit r Second digit Direct pattern selection You can select stitch patterns 00 06 09 and 18 directly by pressing the corresponding direc...

Page 12: ...use the proper foot for the selected pattern The wrong foot can cause the needle to break Each foot is marked with an identification letter q Identification letter Removing the presser foot Raise the...

Page 13: ...mber of fabric layers type of stitch q w e r r q w t e Tension is too loose The needle thread shows through on the wrong side of the fabric and the stitch feels bumpy Turn the dial to a higher number...

Page 14: ...t side of the fabric q Right side top side of fabric w Wrong side bottom side of fabric Tension is too loose The corner of each zigzag point pulls together on the wrong side of the fabric q Right side...

Page 15: ...ing You can set the needle stop position to up or down when the machine stops To enter the needle stop position setting mode turn the power off Press and hold the needle up down button q and turn the...

Page 16: ...e needle and bobbin When sewing stretch fabrics very fine fabrics and synthetics use a blue tip needle The blue tip needle effectively prevents skipped stitches CAUTION Turn OFF the power switch befor...

Page 17: ...d remove the hook cover plate Lift out the bobbin q Hook cover release button w Hook cover plate e Bobbin q w e r t y u i Extra spool pin The extra spool pin is for winding bobbins without unthreading...

Page 18: ...end of the thread held in your hand start the machine Stop the machine when it has wound a few layers and then cut the thread close to the hole in the bobbin n Start the machine When the bobbin is ful...

Page 19: ...notch t Guide c Draw the thread to the left to pass it into the guide path marked 1 Make sure that the thread comes out from the side notch of the bobbin holder y Guide path 1 u Side notch v Continue...

Page 20: ...the check spring holder e w Spool e Check spring holder c Firmly draw the thread up from right to left over the take up lever and down into the take up lever eye v Pass the thread through the lower th...

Page 21: ...loop through the needle y Thread loop z x c v b x c q CAUTION Turn off the power switch when using the needle threader z Lower the presser foot Press the needle up down button q to raise the needle to...

Page 22: ...edle thread lightly with your left hand x Turn the power switch on Press the needle up down button twice to lower and raise the needle to pick up the bobbin thread q Needle up down button c Pull both...

Page 23: ...thicker threads r Thread cutter BASIC SEWING Straight Stitch Sewing q Stitch pattern 00 or 03 w Needle thread tension 2 to 6 e Presser foot Zigzag foot A r w q e 4 q w e q w Auto Thread Cutting To cut...

Page 24: ...scales are marked at 45 60 90 and 120 degrees t Angle scales y Cornering guide y w e r y t q Changing Sewing Direction Stop the machine Raise the presser foot Pivot the fabric around the needle to cha...

Page 25: ...edle to the left Press the sign on the stitch width adjusting key to move the needle to the right q Stitch width adjusting key q Altering the Stitch Length The stitch length can be altered Press the s...

Page 26: ...itches and then stop sewing automatically q Reverse button 4 q w e This unique stitch is used where an invisible locking stitch is needed Lower the needle close to the front edge of the fabric The mac...

Page 27: ...this stitch for seaming fine fabrics Sculpture Stitches q Stitch pattern 56 w Thread tension dial 3 to 6 e Presser foot Satin stitch foot F Stretch Stitch q Stitch pattern 05 w Thread tension dial 3...

Page 28: ...h width q Stitch width adjusting key w Stitch width The stitch width of pattern 06 can be changed without changing its center needle position M e e Center needle position The stitch width of pattern 0...

Page 29: ...igzag foot A This stitch is used to finish a raw edge of synthetics and other stretch fabrics that tend to pucker Sew along the fabric edge leaving an adequate seam allowance After sewing trim off the...

Page 30: ...astic into quarters Match those to the center front center back and side seams and pin the elastic to the fabric Place the elastic under the foot and stitch into place while stretch the elastic evenly...

Page 31: ...sed on fine delicate fabrics such as fine silk r Keyhole buttonhole The keyhole buttonhole is widely used on medium to heavy fabrics It is also suitable for larger and thicker buttons t Stretch button...

Page 32: ...on is extremely thick make a test buttonhole on an extra piece of the fabric If it is difficult to fit the button through the test buttonhole you can lengthen the buttonhole by pulling the button hold...

Page 33: ...onhole will be out of position or there will be a sewing gap u No gap i Starting point o Reference lines 0 Slider 1 Stopper 2 Sewing gap u b Start sewing while pulling the needle thread lightly to the...

Page 34: ...push the buttonhole lever upward as far as it will go y Buttonhole lever Double layer buttonhole To make a sturdy buttonhole sew another layer of buttonhole stitches over the previous stitches After t...

Page 35: ...he buttonhole width can be varied from 5 5 to 7 0 The stitch density can be varied from 0 3 to 0 8 Use the seam ripper and an eyelet punch to open the buttonhole q Eyelet punch not provided with the m...

Page 36: ...wer the foot q Spur w Forks x Start the machine and sew the buttonhole Each side of the buttonhole and the bartacks will be sewn over the cord Remove the fabric from the machine and cut the sewing thr...

Page 37: ...x Select pattern 24 Sew the welted buttonhole on both fabrics together Cut the buttonhole opening as illustrated then pull the patch out through the slit to the other side q Wrong side of patch w Rig...

Page 38: ...16 5 8 away from the hole The corners should be cut rounded off as shown e Right side of patch r Wrong side of garment fabric 0 Place the facing on the wrong side of the garment fabric Mark the 4 corn...

Page 39: ...le thread to the left through the hole of foot q Button holder x Place the fabric under the foot and lower the needle at the starting point w Then lower the foot w Starting point c Start the machine T...

Page 40: ...q 1 5 cm 5 8 Sewing a shorter tack To sew a tack shorter than 1 5 cm 5 8 first stop the machine after sewing the required length then press the reverse button The tack length has been determined Star...

Page 41: ...h length adjusting key Eyelet q Stitch pattern 27 w Thread tension dial 1 to 4 e Presser foot Satin stitch foot F The eyelet is used for belt holes etc Starting to sew Lower the needle at the starting...

Page 42: ...n Add 1 cm 3 8 to the zipper length This is the overall opening size q Right side of the fabric w 1 cm 3 8 e Opening size r Zipper length t End of the zipper opening Zipper Sewing q Stitch pattern 00...

Page 43: ...with the pin on the right hand side Lower the foot onto the topside at the end of the zipper opening so that the needle pierces the fabric next to the fold and the zipper tape c Sew through all layers...

Page 44: ...the opening 0 7 1 cm 3 8 and turn the fabric 90 degrees 0 0 7 1 cm 3 8 n Stitch through the garment and zipper tape guiding the zipper teeth along the side edge of the foot Stop the machine 5 cm 2 be...

Page 45: ...foot Adjust the needle drop position if necessary c Sew while guiding the folded edge e Folded edge r Guide Adjusting the needle drop position Adjust the needle drop position as follows Press the sign...

Page 46: ...ust the stitch width if necessary w Stitch width adjust to span of holes Stitch several times After you finish sewing cut the thread but leave 10 cm 4 of threads at the end Pull the bobbin thread to d...

Page 47: ...lls along the outer edge of the applique q Applique w Outer edge When turning a sharp corner stop the machine with the needle at the outer edge of the applique Raise the foot and pivot the fabric arou...

Page 48: ...e Presser foot Blind hem foot G Fringing adds a special touch on table linens and shawls Choose a firm woven fabric like linen where threads can be removed easily z Carefully cut the fabric on the gr...

Page 49: ...stitching Drawn Work q Stitch pattern 28 w Thread tension dial 1 to 4 e Presser foot Satin stitch foot F 4 w e q You can make cross stitch designs with these patterns in half the time it would take if...

Page 50: ...so the needle catches the folded edge on each side After sewing is finished tear away the paper q 0 3 0 4 cm 1 8 w Paper Select the stitch pattern 54 Tighten the thread tension to 5 8 when sewing Fre...

Page 51: ...straight stitches 1 cm 3 8 apart across the area to be smocked Knot the threads along one edge From the other edge pull the bobbin threads to distribute the gathers evenly q 1 cm 3 8 w Knotted thread...

Page 52: ...3 or 64 w Thread tension dial 3 to 6 e Presser foot Satin stitch foot F 4 q w e Satin Stitches q Stitch pattern 68 w Thread tension dial 1 to 4 e Presser foot Satin stitch foot F The stitch patterns 6...

Page 53: ...6 99 can also be used q w e 4 Correcting Deformed Stitch Patterns The sewing results of stretch stitch patterns may vary depending on sewing conditions such as sewing speed fabric type number of layer...

Page 54: ...w w Needle plate x Lift up the bobbin holder and remove it e Bobbin holder c Clean the bobbin holder with a lint brush r Lint brush v Clean the feed dog and hook race with the lint brush t Feed dog y...

Page 55: ...lever and start the machine again The machine is started after halting due to overload Wait for at least 15 seconds to restart Turn the power switch OFF Remove tangled threads around take up lever hoo...

Page 56: ...ynthetics 4 The needle thread is not threaded properly 5 A poor quality needle is used Page 14 Page 14 Use the stretch stitch needle Page 18 Change the needle Seam puckering 1 The needle thread tensio...

Page 57: ...55 Stitch Chart...

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Page 60: ...812 800 157 EN...

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