2-Needle, 2/3/4-Thread Overlock Sewing Machine MO-114D/104D INSTRUCTION MANUAL MO-104D IMPORTANT: Read all safety regulations carefully and understand them before using your sewing machine. Retain this instruction manual for future reference.
“IMPORTANT SAFETY INSTRUCTIONS” When using an electrical appliance, basic safety precautions should always be followed, including the following: Read all instructions before using this sewing machine. “DANGER ____ To reduce the risk of electric shock:” 1. The appliance should never be left unattended when plugged in. 2. Always unplug this appliance from the electric outlet immediately after using and before cleaning.
Congratulations on your purchase of a JUKI sewing machine. Please be sure to read safety precautions in “To use the sewing machine safely” in the Instruction Manual before use to fully understand the functions and operating procedures of the sewing machine so as to use the sewing machine for a long time. After you have read the Instruction Manual, please be sure to keep it together with the warranty so that you can read it whenever necessary.
WARNING For the combination of the material and the thread and needle, in particular, refer to the explanation table in “Replacement of the needle”. If the needle or thread does not match the material used such as in the case that an extra heavyweight material (e.g., denim) is sewn with a thin needle (#11 or higher), the needle can break resulting in an unexpected personal injury. Other precautions ● Do not put the sewing machine under the direct sunlight or in a humid place.
Contents Safety instructions··································· 1-3 Contents··················································4 Details of the machine······························ 5,6 • Accessories············································6 Preparing the machine································7 • Foot control············································7 • Thread stand··········································8 • Thread, cones, spools······························8 Adjustments and settings Using the mac
Details of the machine MO-114D MO-104D Details of the machine 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Looper cover with built in knife guard Looper cover opening indent Cloth plate Sewing light Thread take-up cover Foot pressure adjusting screw Left needle thread tension lever Right needle thread tension lever Upper looper thread tension lever Lower looper thread tension lever Retractable support rod Thread guide support Open thread guide Spool holder pin Foam pad Anti-vibration cone 17.
Details of the machine 1 Caution 6 5 2 4 3 Be sure to turn off the power switch before opening the looper cover. View with looper cover open 1. 2. 3. 4. 5. 6. Selection lever for overlocking or rollhemming Lower knife Lower looper auto threader (MO-114D) Lower knife set screw Lower looper Upper looper View with cloth plate open 1. Cutting width adjustment knob 2. Stitch length adjustment knob (MO-104D) 3. Differential feed adjustment knob (MO-104D) Accessories 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
Preparing the machine Attaching the foot control Plug foot control into the machine socket (A) and then into the main socket (B). The foot control regulates the sewing speed. The sewing speed can be adjusted by increasing or decreasing the pressure on the foot control. “WARNING” Polarized For UL, CSA Polarized power supply socket This appliance has a polarised plug (one blade wider than the other).
Preparing the machine Thread / cones / spools Large spools The anti-vibration cone should be used with the wider edge at the bottom on the spool holder pin when sewing with cones. If large industrial spools are used, position the anti-vibration cone upside down on the spool holder pin, i.e. with the wider edge at the top. Household spools Thread nets Remove the anti-vibration cones. Place spools on spool holder pins and push the spool caps on with the rounded side downwards.
Using the machine Changing the presser foot • Switch the machine off (Power switch to “0”). • Raise the presser foot. • Turn the handwheel towards you until needles are fully raised. Press the catch (C) to release the presser foot from the clamp. Raise the presser foot to the highest position (B) and remove the presser foot to the left. To attach the presser foot, place it under the shaft. The groove in the shaft should line up exactly with the presser foot pin (D).
Using the machine Handwheel The handwheel turns forward, i. e. in the same direction as on a household sewing machine. Raising the upper knife • Switch the machine off (Power switch to “0”). • Disconnect machine from electricity supply. • Turn the handwheel towards you until needles are fully raised. • Open the looper cover. Press the upper knife holder (E) to the right. Turn the knob clockwise (F) until the knife engages into position as illustrated (G).
Using the machine Inserting needles Needles can be inserted quickly and easily with the practical cleaning brush and needle inserter (A). • Switch the machine off (Power switch to “0”). • Disconnect machine from electricity supply.Turn the handwheel towards you until needles are fully raised. • Lower the presser foot. Using the small screwdriver, loosen the needle setscrews and remove the needles (B).
Using the machine, Threading Preparation / Tips • Switch the machine off (Power switch to “0”). • Disconnect machine from electricity supply. • Support rod with thread guide must be fully raised. • Open looper cover and cloth plate. • Turn the handwheel towards you until the needles are fully raised. • Raise the upper knife. • Raise the presser foot. The tension is automatically released. Thread the machine carefully and in the correct sequence.
Threading 1. Upper looper thread, blue markings Place the spool on the spool holder pin as illustrated. (1) Bring the thread up from the spool and lay it from back to front into the guide (second from right). (2) Take the thread with both hands and lay it in the groove. Press the thread down into the 1st guide on the machine until it clicks into place. (3) Slip the thread through the groove. (4,5,6,7,8) Thread the guides, blue markings.
Threading MO-104D 2. Lower looper thread, red markings Place the spool on the spool holder pin as illustrated. (1) Bring the thread up from the spool and lay it from back to front into the guide (right one). (2) Take the thread with both hands and lay it in the groove Press the thread down into the 1st guide on the machine until it clicks into place. (3) Slip the thread through the groove. (4,5,6,7) Thread the guides. (8) Turn the handwheel to bring the looper to its left most position.
Threading MO-114D 2. Lower looper thread, red markings Place the spool on the spool holder pin as illustrated. (1) Bring the thread up from the spool and lay it from the back to the front into the guide (right one). (2) Take the thread with both hands and lay it in the groove. Press the thread down into the 1st guide on the machine until it clicks into place. (3) Slip the thread through the groove. (4,5,6) Thread the guides. (7) Press the lever of the auto threader down.
Threading 3. Right-hand needle, green markings • Switch the machine off (Power switch to “0”). Place the spool on the spool holder pin as illustrated. (1) Bring the thread up from the spool and lay it from back to front into the guide (second from left) (2) Take the thread with both hands and lay it in the groove. Press the thread down into the 1st guide on the machine until it clicks into place. (3) Slip the thread through the groove.
Threading 4. Left-hand needle, yellow markings • Switch the machine off (Power switch to “0”). Place the spool on the spool holder pin as illustrated. (1) Bring the thread up from the spool and lay it from back to front into the guide (left one). (2) Take the thread with both hands and lay it in the groove. Press the thread down into the 1st guide on the machine until it clicks into place. (3) Slip the thread through the groove.
Trial sewing, Thread tension Sewing test After threading make a trail run. Always use a double layer of fabric to properly check the stitch formation and thread tension. • Switch the machine on (“I”). • Set all tensions to 4. • Stitch length, differential, cutting width (see adjustment & settings). • Lower the upper knife. • Lower the presser foot. • Raise the front of the presser foot slightly with your thumb and position the fabric under the foot just up to the knife. Sew.
Trial sewing, Thread tension Thread tension Thread tension should be adjusted to suit the various types of work. The ideal thread tension for most fabrics and threads is between 3 and 5. However this can vary quite considerably when special threads such as filament, woolly nylon, buttonhole twist (cordonet), pearl yarn or decorative threads are used. Infinitely variable adjustments can be made from 1-9. Move the lever upwards for more tension, move the lever downwards for less tension.
Adjustments and settings MO-114D Stitch length It can be adjusted while sewing. The stitch length is infinitely variable from 1-4mm. Most overlock work is done with a basic setting of 2.5mm. Stitch length MO-104D Switch the machine off (Power switch to “0”). Open the cloth plate, loosen the knob and adjust to the desired length. Tighten the knob and close the cloth plate. The stitch length is infinitely variable from 1 - 4 mm. Most overlock work is done with a basic setting of 2 - 3 mm.
Adjustments and settings MO-114D Differential feed There are two feed dogs, one front (C) and one rear (D). The two feed dogs travel independently and the distance each feed dog travels during one complete movement can be adjusted. The differential feed prevents fluting or waving in knitted or stretch fabrics and or closely woven fabric (E). Perfectly flat seams in knits or stretch fabrics The distance travelled by the front feed dog should be greater than that of the rear feed dog.
Adjustments and settings A B Adjusting the differential feed The differential feed can be adjusted by simply turning the differential feed adjustment dial in the direction desired. Always make a trial run. The differential feed is infinitely variable and can be adjusted while sewing. Effect C D Fabric 2 Wave-free seams (G) Thick wool knits, hand knitted articles, very stretchy fabrics 1.
Adjustments and settings MO-114D Upper looper converter (MO-114D) Use the upper looper converter to sew stitches with one looper thread, such as 2-thread roll hem, 2-thread flatlock and 2-thread overlock. • Turn the handwheel to lower the needles. • Switch the machine off “O”. • Open the looper cover. • Attach the converter (accessory bag) to the upper looper arm (A). Insert the wire hook into the upper looper eye (B) from back to front. The upper looper has now been converted, i.e.
Adjustments and settings Presser foot pressure The presser foot pressure is factory adjusted to a medium setting. Should you wish to adjust it, simply turn the knob in the direction desired: Position of knob for normal pressure (A) More pressure: for thick or stiff fabrics such as denim, tweed, firm linen (B) Less pressure: for lightweight or sheer fabrics and knits (C). Settings and practical sewing Thread breakage during sewing Sew off immediately at an angle and remove the work. Re-thread.
Stitch chart Stitch Stitch width Thread tension Basic settings 4-Thread overlock with integrated safety seam 5-7 mm Left needle (yellow) 3-5 right and left needles Right needle (green) 3-5 Upper looper (blue) 3-5 Lower looper (red) 3-5 Stitch length: 2.5 Cutting width: 2 Differential: N-2 (knits) 0.7-N (wovens) 3-Thread super stretch (MO-114D) 5-7 mm Left needle (yellow) 3-5 right and left needles Right needle (green) 3-5 Lower looper (red) 3-5 Stitch length: 2.
Maintenance WARNING Please refer to the safety instructions! Changing the upper knife The upper knife (moving knife) is made from special hardened material. Should it get damaged, it can be replaced by your local dealer. Changing the lower knife Disconnect machine from electricity supply. Replacing the knives Should the knives get damaged, they can be replaced by your local dealer. Replacing the bulb Switch machine off. (Power switch to „0“). Disconnect machine from electricity supply.
Trouble shooting Problem Cause Solution Page The machine does not sew • The main switch is not on. • The machine is not plugged in. • Switch machine on. (power switch to “I”). • Insert plug in main socket. 8 7 Fabric does not feed evenly • Differential feed is adjusted incorrectly. • Presser foot pressure is too low. • Lower or upper knife is too blunt or wrongly positioned. • Check the differential feed setting. • Adjust the presser foot pressure. • Replace the upper or lower knife.
Technical data Stitch choice 2 needles, 2 loopers: 4 thread overlock with integrated safety seam 1 needle, 2 loopers: 3 thread flatlock, narrow seam, roll hem 1 needle, 1 looper: 2 thread overlock, flatlock, roll hem (MO-114D) 2 needles, 1 looper: 3 thread super stretch (MO-114D) Needle system 130/705H Seam width MO-114D 3-5 mm (2/3 thread overlock) 5-7 mm (4 thread overlock, 3 thread super stretch) Stitch length 1-4 mm Differential feed No waving or fluting in knits N-2 No puckering 0.
Optional Accessories · Blind stitch presser foot · Piping presser foot · Elasticator · Beading presser foot · Cording presser foot • Upper looper converter (Optional for MO-104D) Contact your local dealer.
2-11-1, TSURUMAKI, TAMA-SHI, TOKYO, 206-8551, JAPAN PHONE : (81)42-357-2341 FAX : (81)42-357-2379 Copyright © 2015 JUKI CORPORATION All rights reserved throughout the world.
