Bernina Dcet 2500 Operation instructions

1999 BERNINA of America

Mastering the

BERNINA

BERNINABERNINA

BERNINA





2500 SERIES

OWNER’S GUIDECLASS

WORKBOOK

SECTION A

LETS START WITH THE BASICS

1999 BERNINA of America page 2

SECTION A – LETS START WITH THE BASICS

MACHINE SET UP

• Identifying the Serger Parts – Instruction Manual pg.___

• Attaching the Foot Control and Power Cord – Instruction Manual pg.____

• Assembling the Thread Stand – Instruction Manual pg.___

• The Waste Collector

• Power Switch – Instruction Manual pg.___

• Light Switch– Instruction Manual pg.___

• The Looper Cover – Instruction Manual pg.___

Loopers – what are they? – Instruction Manual pg.___

Tool Storage

Safety Feature – machine won’t sew when the Cover is open

• Swing Out Presser Foot – Instruction Manual pg.___

For easier threading

For easier removal and insertion of Needles

Safety feature – the machine won’t sew

Use the Needle Stop Button to raise the Needles

Raise the Presser Foot

Swing the Presser Foot to the left

• Free Arm Cover – Instruction Manual pg.___

For serging tubular projects

Slides off to engage free arm

THREADS – Instruction Manual pg.___

• Types to use

• The importance of quality threads

NEEDLES – Instruction Manual pg.___

• Always start with a new Needle

• Match the Needle to the fabric and thread – Instruction Manual pg.___

• Change the Needle often

• Using the Needle Inserter

• Loosening/re-tightening Needle screws

STITCH SELECTION DIAL – STITCH SELECTION PANEL

• Selecting stitches

• Understanding the code – Instruction Manual pg.___

1999 BERNINA of America page 3

NEEDLE STOP BUTTON – Instruction Manual pg.___

• Needle Up - Overlock sewing

• Needle Down – Cover/Chain Stitch sewing

CONVERSION TO OVERLOCK SEWING

• Conversion Chart – Instruction Manual pg.___

• The Converter Arm

Use the Needle Stop Button to lower the Needles

• Removing the Cover/Chain Stitch Extension Plate – Instruction Manual pg.___

• Installing the Knife Guard – Instruction Manual pg.___

• Raising/Lowering the Knife Arm– Instruction Manual pg.___

• Rotating the Upper Knife into Cutting Position– Instruction Manual pg.___

THREADING FOR OVERLOCK SERGING

• Cone Holders and Spool Caps – Instruction Manual pg.___

Cone Holders used for large cones of serger thread

Turn the Cone Holders upside down for the larger based cone threads.

Spool Caps used for “normal” sewing thread and decorative thread spools

• Raise the Presser Foot when threading

Releases the pressure on the tension disks

• The Threading Path – Instruction Manual pg.___

Use the road map inside the Looper Cover as a quick reference guide.

• Threading the First Thread Guide on All Threads – Instruction Manual pg.___

Wrap the thread from left to right to lock the thread into the guide.

• Threading Order

First – Upper Looper

This thread lies against the body of the serger.

Second – Lower Looper

Third – Center Needle

Fourth – Left Needle

• Thread the Upper Looper – Instruction Manual pg.___

• Thread the Lower Looper – Instruction Manual pg.___

The Lower Looper Auto Threader – Instruction Manual pg.___

Rotate the Handwheel to bring the Looper to the right before engaging

the Looper Threader

• Thread the Center Needle -– Instruction Manual pg.___

• The Needle Clamp Guide – Instruction Manual pg.___

• Optional - Using the Quick Needle Threader from a BERNINA sewing machine.

• Thread the Left Needle – Instruction Manual pg.___

1999 BERNINA of America page 4

TEST SEWING – Instruction Manual pg.___

• Lift the Toe to place the fabric under the Presser Foot

• Lift the Presser Foot for thick fabric or when accurate fabric placement

is needed.

• Chain off the fabric.

• Use the built in Thread Cutter to cut the Thread Chain.

1999 BERNINA of America page 5

TENSION THEORY

A BALANCED 4-THREAD STITCH

Instruction Manual pg.___

Serger Library -

Tips and Tricks

•Turn the Stitch Selection Dial to select “A” on the Stitch Display panel.

•Thread the serger for a 4-thread Overlock stitch using thread colors to match

the Color-Coded Threading Path on the serger.

•Fold the fabric in half to 3” X 6”.

•To begin stitching, lift the front of the Presser Foot with your right thumb

and slide the fabric under the Presser Foot. Release the tip of the Presser

Foot and begin serging.

•Serge to the end of the fabric.

•Continue stitching off the fabric until you have a 3”- 4” Thread Chain.

•Locate the Thread Cutter on the left side of the serger and cut the thread

chain (from right to left).

•Examine the serger stitch formation and compare it to the balanced stitch

graphic on page__ of the Instruction Manual.

•Read the information under Fine Tuning on page__ of the Instruction Manual

for information about the stitch formation and correcting any stitch

irregularities.

•Make any necessary tension adjustments and serge another row of stitching.

•Trim and mount the sample.

FABRIC: Firm fabric 6” X 6”

NEEDLES: 80/12 Universal

THREAD: 4 cones of serger thread

(yellow,green,blue,red)

PRESSER FOOT: Standard

1999 BERNINA of America page 6

ADJUSTING TENSIONS

Instruction Manual pg.____

Serger Library – Tips and Tricks

LOWER LOOPER

•Turn the Stitch Selection Dial to select “A” on the Stitch

Display panel.

•Thread the serger for a 4-thread Overlock stitch using thread

colors to match the Color-Coded Threading Path on the serger.

•Fold each piece of the firm fabric to 1½” X 4” and set aside.

•Locate the Fine Tuning levers on the front of the serger. From

left to right these levers adjust tension for the Left Needle,

the Center Needle, the Upper Looper or Right Needle, and

the Lower Looper.

•Adjust the Lower Looper Fine Tuning Lever to increase (up)

the tension on the Looper thread.

•Place the first piece of folded fabric under the Presser Foot

with the fold to the right and serge to the end of the fabric,

cutting off the fold.

•Examine the sample. The Looper threads do not lock on the

edge of the fabric. The Upper Looper thread is pulled tightly

to the back of the stitch. The Left Needle thread may be

pulled to the back of the stitch.

• Trim, label, and mount the sample.

• Turn the Stitch Selection Dial to “B” and then to “A” to return

tensions to normal.

• Adjust the Lower Looper Fine Tuning Lever to decrease (down)

the tension on the Looper thread.

• Serge the second piece of folded fabric, cutting off the fold.

• Examine the sample. The Looper threads do not lock on the

edge of the fabric. The Lower Looper thread is visible on the

face of the fabric. The Looper threads are very loose.

• Label, trim, and mount the sample.

FABRIC: 6 pieces of firm woven fabric 3” X 4”

1 piece of light weight woven cotton 3” X 4”

NEEDLES: 80/12 Universal

THREAD: 4 cones of serger thread

(yellow,green,blue,red)

PRESSER FOOT: Standard

1999 BERNINA of America page 7

UPPER LOOPER

•Turn the Stitch Selection Dial to “B” and then to “A” to return tensions to normal.

•Adjust the Upper Looper Fine Tuning Lever to increase (up) the tension on the

Looper thread.

•Serge the third piece of folded fabric, cutting off the fold.

•Examine the sample. The Looper threads do not lock on the edge of the fabric. The

Lower Looper thread is pulled tightly to the front of the stitch.

•Label, trim, and mount the sample.

•Turn the Stitch Selection Dial to “B” and then to “A” to return tensions to normal.

•Adjust the Upper Looper Fine Tuning Lever to decrease (down) the tension on the

Looper thread.

•Serge the fourth piece of folded fabric, cutting off the fold.

•Examine the sample. The Looper threads do not lock on the edge of the fabric. The

Upper Looper thread is visible on the back of the fabric. The Looper threads are

very loose.

•Label, trim, and mount the sample.

•Turn the Stitch Selection Dial to “B” and then to “A” to return tensions to normal.

1999 BERNINA of America page 8

CENTER NEEDLE

•Adjust the Center Needle Fine Tuning Lever to decrease

(down) the tension on the Needle thread.

•Serge the fifth piece of folded fabric cutting off the fold.

•Examine the sample. The Needle thread forms a large loop on

the back of the fabric.

•Label, trim, and mount the sample.

•Turn the Stitch Selection Dial to “B” and then to “A” to

return tensions to normal.

LEFT NEEDLE

•Adjust the Left Needle Fine Tuning Lever to decrease (down)

the tension on the Needle thread.

•Serge the sixth piece of fabric cutting off the fold.

•Examine the sample. The Needle thread forms a large loop on

the back of the fabric.

•Label, trim, and mount the sample.

•Turn the Stitch Selection Dial to “B” and then to “A” to

return tensions to normal.

Both Needles

•Adjust both the Left and Center Needle Fine Tuning

Levers to increase (up) the tension on the Needle threads.

•Fold the piece of lightweight woven cotton fabric to 1½” X 4”.

•Serge the folded fabric, cutting off the fold.

•Examine the sample. The stitch is puckering the fabric.

•Label, trim, and mount the sample.

•Turn the Stitch Selection Dial to “B” and then to “A” to

return tensions to normal.

1999 BERNINA of America page 9

STITCH LENGTH ADJUSTMENT

Instruction Manual pg.___

•Fold the fabric in half to 3” X 6”.

•Using a Fabric Marker, divide the fabric into four equal sections along the

folded edge.

•Turn the Stitch Selection Dial to select “A” on the Stitch Display panel.

•Thread the serger for a 4-thread Overlock stitch.

•Locate the Stitch Length Dial on the right end of the machine.

•Turn the Stitch Length Dial to 4.

•Serge to the first mark along the folded edge of the fabric, trimming the

folded edge as you serge.

•Turn the Stitch Length Dial, adjusting the Stitch Length to 3 and serge to

the second mark.

•Adjust Stitch Length to 2 and serge to the third mark.

•Adjust Stitch Length to 1 and serge to the end of the fabric.

•Mark the Stitch Length settings on the sample.

•Compare the Stitch Length sample to the Balanced 4-thread sample to see how

Stitch Length affects the balance of the Overlock stitch.

•Trim and mount the sample.

FABRIC: Firm fabric 6” X 6”

NEEDLES: 80/12 Universal

THREAD: 4 cones of serger thread

PRESSER FOOT: Standard

1999 BERNINA of America page 10

CUTTING WIDTH ADJUSTMENTS

Instruction Manual pg,___

•Fold the fabric in half to 3” X 6”.

•Divide and mark the fabric into 3 equal sections along the folded edge.

•Turn the Stitch Selection Dial to select “A” on the Stitch Selection Panel.

•Turn the Stitch Length Dial to 2.5 (normal).

•Thread the serger for a 4-thread Overlock stitch.

•Locate the Cutting Width adjustment Dial.

•Rotate the Upper Knife up.

•Adjust Cutting Width to 3.

•Rotate the Upper Knife down into Cutting Position.

•Serge to the first mark on the fabric, stopping when the Knife edge is on the

mark.

•Adjust Cutting Width to 2 and serge to the second mark.

•Adjust the Cutting Width to 1 and serge to the end of the fabric.

•Mark the Cutting Width settings on the sample.

•Rotate the Upper Knife up.

•Adjust Cutting Width to 2 (normal).

•Rotate the Upper Knife down into Cutting Position.

•Compare the Cutting Width sample to the Balanced 4-thread sample to see how

Cutting Width affects the balance of the Overlock stitch.

•Trim and mount the sample.

FABRIC: Firm fabric 6” X 6”

NEEDLES: 80/12 Universal

THREAD: 4 cones of serger thread

PRESSER FOOT: Standard

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