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Bernette b48, Instruction Manual

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NAME OF PARTS

Details of machine

  Retractable thread stand
  Carrying handle
  Left needle thread tension lever (yellow)
  Right needle thread tension dial (green)
  Upper looper thread tension dial (blue)
  Lower looper thread tension dial (red)
  Chainstitch looper thread tension dial (violet)
  Stitch plate
  Sewing table

  Looper cover
  Power / Light switch
  Stitch length dial
  Handwheel
  Thread stand
  Spool stabilizer
  Spool pin
  Cut-offs Bin

Summary of Contents for b48

Page 1: ...Bernette Funlock B48 Coverstitch Overlocker Machine View Buy Here https www thesewingstudio co uk bernette funlock b48 overlocker machine ir...

Page 2: ...Instruction Manual...

Page 3: ......

Page 4: ...ches 21 Threading Diagram Overlock and Chainstitches 21 Threading Diagram Coverstitches 21 Threading the Upper Looper Blue 22 Threading the Lower Looper Red 23 Threading the Chainstitch Coverstitch Lo...

Page 5: ...Seam 59 3 Thread Rolled Hem 59 2 Thread Rolled Hem 60 STITCH VARIATIONS AND SEWING TECHNIQUES How To Sew A Flatlock Decorative Seam 61 How to sew an Overlock Blind Hem 63 How to sew Pin Tucks 63 How...

Page 6: ...l authorized BERNINA dealer for examination or repair 4 Never operate the machine with any air openings blocked Keep ventilation openings of the machine free from the accumulation of lint dust and loo...

Page 7: ...ly This appliance may only be used by children over eight and by persons with reduced physical sensory or mental capabilities or by persons who lack experi ence and knowledge of how to operate the mac...

Page 8: ...thread tension lever yellow Right needle thread tension dial green Upper looper thread tension dial blue Lower looper thread tension dial red Chainstitch looper thread tension dial violet Stitch plat...

Page 9: ...8 19 21 18 20 22 Presser foot lifter Differential feed dial Cutting width dial Presser foot pressure wheel Standard presser foot Overlock Coverstitch...

Page 10: ...er Allen screw driver small Tweezers Upper looper converter ULC Spool stabilizer 5x Dust cover Cut offs Bin Cover Chainstitch Insert This overlock uses a flat shank industrial needle ELx705 Do not att...

Page 11: ...into electric outlet Push l mark side to turn ON Push O mark side to turn OFF 1 Push the cover to the right as far as it will go 2 Pull cover down toward you CAUTION Be sure to turn off power switch C...

Page 12: ...he rated voltage of the motor Handle the foot controller with care and avoid dropping it on the floor Be sure not to place anything on top of it when not in use Disconnect the power line plug from the...

Page 13: ...he telescope will click into place when they are correctly positioned Center the retractable thread stand above the spool pins Place thread over the cone adapters on the spool pins Spool net When usin...

Page 14: ...2 toward counter clockwise until the knife clicks into a lock position To place upper knife in working position Open looper cover Pull the upper knife holder 1 to the right as far as it will go Turn...

Page 15: ...eye of the upper looper converter 1 2 3 1 2 3 CAUTION Be sure to turn off power switch Remove the Upper Looper Converter When using the upper looper the upper looper converter must be disengaged To d...

Page 16: ...e needles are to be used for sewing Do not attempt to use four or five needles The Stitch overview refers to different needle positions by illustrating the needle holder 1 A A B B B C C D D E E A B C...

Page 17: ...ce 1 to the back Insert the needle into the needle socket as far as it will go When inserting a needle if you first lower it down into the hole in the stitch plate it will line up with the needle sock...

Page 18: ...ad stitch is for edging light weight fabrics 59 8 3 Thread Rolled Hem 1 needle 2 thread stitch is used for sewing narrow rolled hems For a beautiful rolled hem thread the upper looper with decorative...

Page 19: ...tch made up of combined 2 Thread overlock and double chainstitch A wide seam is formed by using left needle Overlock and seaming can be done in one operation on non stretch fabrics 50 21 4 Thread Cove...

Page 20: ...Tension Color Code yellow LN LC CC green RN LN blue UL RC red LL violet CL Needles and Loopers LN Left Needle RN Right Needle LC Left Coverstitch Needle for CS CC Center Coverstitch Needle for CS RC R...

Page 21: ...latlock narrow 2 5 1 KG 6 N 0 0 4 5 13 2 Thread Rolled Hem 1 1 KG 5 R 4 5 4 0 14 2 Thread Overlock wide 2 5 1 KG 6 N 0 0 4 0 15 2 Thread Overlock narrow 2 5 1 KG 6 N 0 0 4 5 16 2 Thread Chainstitch 3...

Page 22: ...read Green 5 Left needle thread Yellow 6 Topside of fabric 7 Underside of fabric Tension color code Overlock Stitches 1 Upper looper thread Blue 2 Lower looper thread Red 3 Left needle thread Yellow 4...

Page 23: ...ff power switch Pass thread from back to the front through the thread guide 1 Thread the pre tension guide by pulling the thread towards the right until it slips under guide 2 Then pull thread along t...

Page 24: ...2 Then pull thread along the right side of pre tension as illustrated Thread the looper area of the machine following the blue color coded thread guides 4 8 Thread the hole in the upper looper from fr...

Page 25: ...d with the point of the tweezers slightly from left and to the right of threading guide 4 Thread the looper eye A from front to back Pull about 10 cm 4 inches of thread Position thread into V cutout B...

Page 26: ...0 CAUTION Be sure to turn off power switch Pass thread from back to the front through the thread guide 1 Thread the pre tension guide by pulling the thread towards the right until it slips under guide...

Page 27: ...lace the thread with the point of the tweezers through threading guide 4 Place the thread with the point of the tweezers through the front slot of threading guide 5 Place the thread with the point of...

Page 28: ...rn off power switch Pass thread from back to the front through the thread guide 1 Thread the pre tension guide by pulling the thread towards the right until it slips under guide 2 Then pull thread alo...

Page 29: ...eedle slip thread behind thread guide 9 located on the bottom of the needle holder Thread the eye of the right needle 10 6 7 8 9 5 4 10 8 4 5 7 6 3 2 9 10 1 1 2 2 10 9 8 4 5 7 6 3 2 9 10 1 1 2 10 9 8...

Page 30: ...into the middle slot on the thread guide 5 and into the slot on the take up lever cover 6 Then slip the thread into the middle slot on the thread guides 7 and 8 PLEASE NOTE Use of tweezers in the loo...

Page 31: ...it between the tension discs and pull thread down to make certain it is properly located in between the tension discs 3 Threading the Coverstitch Needles Right Coverstitch Needle Blue E On Needle Clam...

Page 32: ...er foot Thread the eye of the right needle 10 PLEASE NOTE Slip thread into the rear slot on the thread guide 5 and bottom slot of take up lever cover 6 Then slip thread into the right slot on the thre...

Page 33: ...6 Then slip thread into the middle slot on the thread guide 7 and thread guide 8 2 2 1 3 3 6 7 8 10 5 4 9 Thread the pre tension guide by pulling the thread towards the left until it slips under guide...

Page 34: ...presser foot Thread the eye of the center needle 10 PLEASE NOTE Use of tweezers in the looper cover will make needle eye threading easy Pass thread from back to the front through the thread guide 1 L...

Page 35: ...hread the pre tension guide by pulling the thread towards the left until it slips under guide 2 Then pull thread along the right side of pre tension as illustrated While holding thread with fingers pa...

Page 36: ...h length If clipped too short threads may come untied Firmly pull both thread to test knot security Raise the presser foot to open the tension discs Pull the threads through the machine one at a time...

Page 37: ...eight fabrics For rolled hems and narrow seams set the stitch length between 1 and 2 A shorter stitch length can be used to avoide fabric from puckering Adjust the stitch length to 2 4 when sewing hig...

Page 38: ...sure However there are some instances where adjustment is necessary such as when sewing light weight and heavyweight fabrics In such case use for normal L for the lightest pressure and H for the heavi...

Page 39: ...ics cut on the bias Setting 1 is differential feed dial setting for ratio 1 1 Gathered overlock is most suited for shirring sleeves yokes front and back bodices skirt hems etc in stretch fabrics as we...

Page 40: ...seam apply gentle tension to the fabric by holding the seam lightly in front and back of the presser foot PLEASE NOTE If amount of stretch is not correctly set in rela tion to the fabric being sewn t...

Page 41: ...the sample continue to run the machine with the presser foot down until the chain reaches 15 20 cm 6 8 inches in length Cut thread PLEASE NOTE Do not pull on the fabric while sewing as this may defle...

Page 42: ...a lower number PLEASE NOTE These are suggested tension settings only Tension settings are effected by 1 Type and thickness of fabric 2 Needle size 3 Size type and fiber content of thread Stitch length...

Page 43: ...stall seam guide plate CSI The graduations on seam guide plate indicate the distance from chainstitch needle Use this as a guide when checking the distance between coverstitch left needle and fabric e...

Page 44: ...er thread tension is too loose Turn the lower looper thread tension dial red toward a higher number PLEASE NOTE These are suggested tension settings only Tension settings are effected by 1 Type and th...

Page 45: ...1 Type and thickness of fabric 2 Needle size 3 Size type and fiber content of thread Thread Color Code Refer page 21 2 Thread Overlock narrow Medium weight fabric Thread tension dial Yellow Green Blu...

Page 46: ...only Tension settings are effected by 1 Type and thickness of fabric 2 Needle size 3 Size type and fiber content of thread Thread Color Code Refer page 21 2 Thread Flatlock narrow Medium weight fabric...

Page 47: ...ected by 1 Type and thickness of fabric 2 Needle size 3 Size type and fiber content of thread Thread Color Code Refer page 21 3 Thread Overlock narrow Medium weight fabric Thread tension dial Yellow G...

Page 48: ...ion is too loose Turn the lower looper thread tension dial red toward a higher number PLEASE NOTE These are suggested tension settings only Tension settings are effected by 1 Type and thickness of fab...

Page 49: ...settings only Tension settings are effected by 1 Type and thickness of fabric 2 Needle size 3 Size type and fiber content of thread When the left needle thread tension is too loose Turn the left need...

Page 50: ...ower looper thread tension dial red toward a higher number Or turn the upper looper thread tension dial blue toward a lower number When the left needle thread tension is too loose Turn the needle thre...

Page 51: ...too loose Turn the right needle thread tension dial green toward a higher number When the chain needle thread tension is too loose Turn the chainstitch needle thread tension dial yellow toward a highe...

Page 52: ...Thread Overlock Chain narrow Medium weight fabric Thread tension dial Yellow Green Blue Red Violet 2 0 4 5 4 5 4 0 5 5 3 Thread Overlock Chain wide Medium weight fabric Thread tension dial Yellow Gre...

Page 53: ...sewing denim change needles first and then adjust the tensions little by little 1 4 number at a time Machine set up Open looper cover Refer page 10 Disengage upper looper Refer page 42 Place the mova...

Page 54: ...from the middle of the fabric place the fabric at the desired of starting point of sewing b Place fabric under presser foot behind the needle c Lower presser foot At end of sewing d Stop sewing when...

Page 55: ...bric bulges between needle threads and the seams on the underside of the fabric becomes tight Turn the coverstitch looper thread tension dial violet toward a lower number PLEASE NOTE These are suggest...

Page 56: ...t needle thread tension dial blue toward a higher number Or turn the coverstitch looper thread tension dial violet toward a lower number When the top surface of fabric bulges between needle threads an...

Page 57: ...lowing the same steps as described when sewing through to the edge of fabric When sewing through to the edge of fabric among the threads coming out of the fabric edge knot the needle threads 2 or 3 Th...

Page 58: ...or stiff fabrics Machine set up Remove the overlock left needle Move seam width finger knob to setting R Align left face of seam width finger support plate with R mark on stitch plate by turning cutti...

Page 59: ...hread chain when you begin sewing to keep it from curling into the seam Place a slight tension on the material in the sewing direction and a finer seam finish can be obtained The minimum overlock stit...

Page 60: ...olled hem thread the upper looper with wooly nylon and the needle and lower looper with light weight regular thread Thread Color Code Refer page 21 3 Thread Narrow Seam Light weight fabric Thread tens...

Page 61: ...l rolled hem thread the lower looper with wooly nylon and the needle with light weight regular thread 2 Thread Rolled Hem Light weight fabric Thread tension dial Yellow Green Blue Red Violet Polyester...

Page 62: ...machine threaded and tension balanced for the 2 Thread flatlock stitch refer page 45 or 3 Thread flatlock stitch Refer page 47 Flatlocking A Seam Place the fabric wrong sides together to sew a decorat...

Page 63: ...flatlock The lower looper thread is the prominent thread in a 2 thread flatlock Thread decorative yarn in the prominent threading path accordingly For a ladder stitch sew seam with right sides togeth...

Page 64: ...he right side with 6 mm 1 4 inch beyond the fold Stitch on the extended hem edge allowing the machine needle to barely catch the edge of the fold PLEASE NOTE For this technique also a 3 thread rolled...

Page 65: ...er Cut out approximately 2 cm 51 64 inch from the corner in line with the overlock seam edge Turn the fabric and lower the presser foot so that the upper knife is positioned in line with the cut edge...

Page 66: ...ives Turn the fabric and lower the presser foot so that the upper knife is positioned in line with the cut edge Pull slack threads up then start to sew CAUTION Sewing over pins will damage and or dest...

Page 67: ...of the machine and sew the garment seam The tape is attached as the seam is sewn Braiding by Chaining off Place the movable upper knife in nonworking position Insert filler cord such as yarn or twill...

Page 68: ...he internal working parts Cleaning The Machine Oiling The Machine Clean the lint from the looper and knife area often with a dry lint brush The oiling points shown in the diagram should be oiled perio...

Page 69: ...epresentative to make the replacement Be sure that the power line plug is disconnected from the electric source a Open the looper cover and set the upper knife in the working position b Loosen the upp...

Page 70: ...Replacement Place presser foot sole on stitch plate under presser foot shank so that hinge pin C will fit in slot B of the shank Then lower presser foot shank If presser foot sole can not be placed u...

Page 71: ...where seam should not be visible Gathering Foot This foot is most suited for gathering when sewing tiered skirts yokes cuffs and frills on skirts etc This foot is also suited for sewing two fabrics to...

Page 72: ...d to form a hem A coverstitch neatens both edges at the same time whilst the material is folded by 1 cm Binder Attachment for unfolded bias tape The binder attachment creates practical edge finishes w...

Page 73: ...only ELx705 overlock needles 2 Tighten needle set screw 3 Insert needles correctly 4 Change type or size of needles 5 Check threading 6 Increase presser foot pressure 7 Use a high quality thread 9 15...

Page 74: ...Cotton 60 80 Silk Rayon 50 Spun 60 80 Polyester 60 80 90 14 80 12 Heavy weight Oxford Denim Tweed Serge Corduroy Cotton 40 60 Silk Rayon 40 60 Spun 60 80 Polyester 50 80 90 14 Knit Fabric Thread Need...

Page 75: ...rolled hemming 1 2 ordinary overlock N 2 5 Differential feed stretching 0 6 1 gathering 1 2 Presser foot lift 4 5 mm Sewing Light LED Sewing speed 1300 stitches max Foot control Type 4C 316B for USA...

Page 76: ......

Page 77: ...www mybernette com yellow shirt EN 06 2017 4rd Edition 5040007 0 04 G8P02 BERNINA International AG Steckborn CH www bernina com...

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