Kenmore 1250 User Manual
Kenmore
INSTRUCTIONS
MODEL 1230/1240/1250 • ZIG* ZAG SEWING MACHINE
#52917
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TABLE OF CONTENTS
Section I Knowing Your Sewing Machine
Section I
Page 1
Identifying Parts
Installing and Connecting Machine
Bobbin......................................................................5, 6, 7
Threading-Top Thread................................................... 8
Using the Controls
Top Tension Control
Bobbin Tension Adjusting......................................11
Checking Tensions
Stitch Length Control
Stitch Width Control
Reverse Stitch Control
Special Stitch Variegator........................................ 15
Special Stitch Dial...................................................16a, b
Pressure Regulator.................................................
Feed Dog Control.....................................................18
Sewing Light
Seam Guide...............................................................19
Accessories
Needles......................................................................20
Needle, Thread, Fabric Chart..................................21
Presser Feet..............................................................22
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2, 3
9, 10
12
13
14
15
17
4
Section n Starting to Sew
Garment Construction Stitches
Straight Stitching
Zigzag Stitching......................................................... 4
Overcasting................................................................ 4
Stretch Stitching
Special Finishing Stitches
Blind Hemming ........................................................
Satjn Stitching........................................................... 7
Mending...................................................................... 7
Appliqueing.............................................................. 8
Buttonholing.........................................................9, 10
ButtonSewing, Bar Tacking....................................11
Maxi Stitch Stretch
Feather Stretch.........................................................12
Darning, Writing and Monogramming
Zipper Application....................................................14
Section HI Checking Performance Problems
Section W Caring For The Machine
Cleaning Feed Dogs and Shuttle ...........................
Oiling Under Arm Cover Plate
and in Face Cover Plate............................................ 2
Oiling Underside....................................................... 2
Parts List......................................................................3, 4
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1
2, 3
5
6
11
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Section I
Page 2
Knowing Your Sewing Machine
1. Hand Hole Cover Plate
2. Seam Guide Lines
3. Presser Foot
4. Needle Clamp Screw
5. Presser Foot Screw
6. Thread Guide
7. Face Cover Thread Guide
8. Top Thread Tension Control
9. Face Cover Plate
10. Take-up Lever
11. Upper Thread Guide
12. Special Stitch Dial
(Model 1250 only)
13. Stitch Width Control
14. Special Stitch Variegator
(Models 1240,1250 only)
15. Stitch Length and
Reverse Stitch Control
16. Light and Power Switch
17. Feed Dog Control
18. Nomenclature Plate
19. Clutch Knob
20.
Hand Wheel
21.
Bobbin Winder
22.
Thread Spool Pins
23.
Bobbin Winder Tension Disc
24. Pressure Regulator
25. Presser Foot Lever
26.
Thread Cutter
27. Feed Dogs
Section I
Page 4
INSTALLING MACHINE
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1. Loosen the two hinge screws under
holes in the rear edge of the machine
bed.
2. Raise hinge pins in the cabinet cutout.
3. Slip machine head onto the pins and
tighten hinge screws securely.
4. Push the speed control plug onto
three-prong connector under the bed
plate. Lower machine head to front
cabinet flap.
Plug the speed control cord into any
110-120 volt wall outlet.
Turn on power by pushing light an
6.
power switch.
Screw spool pins firmly in place wUh
7.
screwdriver. Place the plastic sp
holder onto the spool pin. Holder ana
pins are packed in the accessory o •
REMOVING BOBBIN CASE FROM SHUTTLE
Section I
Page 5
1. Turn hand wheel to raise needle to
its highest position. Lift hand hole
cover plate.
2. Pull open latch of bobbin case.
3. Pull bobbin case straight out of
shuttle.
To thread the bobbin case, see
page 7.
Section I
Page 6
WINDING THE BOBBIN
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1. Release clutch by turning clutch knob
toward you.
2. Draw thread from spool through
bobbin winder tension discs as shown.
3. Pull end of thread through hole in
bobbin as shown.
4. Place bobbin onto bobbin winder shaft
with end of thread coming from the top
of the bobbin. Push bobbin winder
latch against bobbin until it clicks.
Holding onto end of thread, start
machine. When bobbin is slightly filled,
snip off end of thread.
5. Start machine. Wind thread until
bobbin winder latch releases.
6. Tighten clutch knob and remove
bobbin.
Two spool pins have been included with
this machine to aid in bobbin winding. By
placing a spool of thread on the second
spool pin, you may wind your bobbin
without unthreading the machine.
THREADING THE BOBBIN CASE
Section I
Page 7
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1. Insert bobbin into bobbin case
making sure thread is coming from
bobbin as shown.
2. Pull thread through slot of case as
shown.
3. Pull thread under tension spring.
4. Turn hand wheel to raise needle to
its highest position. Holding latch
open, position case into shuttle, and
release latch. Case should lock into
place when latch is released.
Hold needle thread loosely in left
hand and rotate hand wheel toward
you one complete turn. Bring bobbin
thread up by pulling upper thread.
Section I
Page 8
THREADING OF TOP THREAD
Fig3
Place thread on spool pin as shown,
with the thread coming from the back
of the spool (Fig. 1-©). Draw thread
through the top thread guide(s) (Fig.
1-@or ®).
Holding the spool with the right hand,
2.
pull the thread through the tension
discs. The spring wire loop should be
pulled up until the thread passes
beyond the beak of the hook. Fig. 2.
After the thread has slipped into the
hook, allow the spring wire to return to
position by releasing the thread spool.
Fig. 3.
Continue threading through the front
thread guide, hook thread into take up
lever and down through path shown in
Fig. 4 and 5.
Always thread needle in direction as
5.
shown in Fig, 5.
CONTROLS
TOP TENSION CONTROL
Section I
Page 9
Probably the most important control on your machine is this one that regulates your
top thread tension. It consists of discs between which the thread passes. The
pressure on these discs is regulated by turning the dial. The higher the number, the
tighter the tension.
There are many reasons for having to reset your tension. The best tension for one
fabric may not be correct for another. The required tension depends upon the
stiffness of the fabric, thickness of the fabric, numbers of layers of fabric being
sewn, as vyell as the type of stitch you are making.
It is best to test the stitching on a scrap of the fabric you are using before starting to
make a garment. To adjust for the correct stitch; see next page.
Section I
Page io
ADJUSTING TOP TENSIONS
^ Upper thread too tight
A perfect straight stitch will have
threads locked between the two
layers of fabric with no loops on
top or bottom.
^ Upper thread too loose
Decrease Tension
Increase Tension
ADJUSTING BOBBIN TENSIONS
Bobbin tension requires adjusting less frequently than the upper thread tension.
If the stitch is satisfactory but the seanr) is puckered, it may be necessary to loosen
the tension on both the top and bottom threads. Be sure to balance them as
Indicated on page 10.
When adjusting the tension on the bobbin case, make slight adjustments with a
screwdriver. Correct tensions will produce the stitch shown on page 10.
INCREASE TENSION
Turn Clockwise.
Section I
Page 12
To check the thread tension balance, be sure to use mercerized thread of the same
size on the top and on the bobbin, and a sharp, correctly sized needle for the fabric
you are sewing. Begin with a full bobbin. Set the stitch length for about 12 stitches
per inch.
Fold a 6" square of fabric in half diagonally, forming a triangle. Make a line of
stitching W' in from the fold.
a. If seam is puckered-both tensions are too tight.
b. If the bottom thread lays on the fabric-tighten upper thread tension, and
repeat test. See Fig. 3, Page 10.
c. If the top thread lays on the fabric-loosen upper thread tension, and repeat
test. See Fig. 2, Page 10.
Grasp the stitching and pull with a snap to make the threads break.
a. If both threads break-tensions are balanced.
b. If neither thread breaks-both tensions are too loose.
c. If upper thread breaks-loosen top tension,
d. If lower thread breaks-tighten top tension.
Both threads do not have to break at the same place, but they should break on the
same snap.
It is necessary to reduce the upper thread tension somewhat when zigzag stitching.
The wider the stitch, the less tension that is needed. This Is particularly important
when making designs. It is not desirable to have any of bottom thread visible on the
right side of the fabric when satin stitching.
The stitch length control regulates the length of the stitch you select. THE
HIGHER THE NUMBER-THE SHORTER THE STITCH.
The stitch setting you use will be determined by the thickness of the fabric you
are sewing. A longer stitch setting should be used for thicker fabric or more
layers of fabric.
The middle range of the control is the 10-12 stitch per inch range which Is the
most commonly used.
The basting and stretch stitch are made by adjusting the lever to make the
longest possible stitch. When adjusting for shorter stitches, select the stitch
length and tighten the knob In the center of the lever handle to remain at the
same setting. The knob must be loosened to readjust the lever.
Section I
Page 14
The stitch width control regulates the width of the stitch you select. THE
HIGHER THE NUMBER, THE WIDER THE STITCH.
You may vary your zigzag stitch width by adjusting this control to the setting you
desire.
This control must be on the Red Dot in order to do straight stitching. Before
turning control, make sure needle is above fabric.
You will note a simulated buttonhole between the numbers 2 and 1 on the
control. This is the setting to be used when a buttonhole is sewn. The control
may have to be adjusted slightly in either direction depending on the weight of
the fabric being used.
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