Singer HA-1 Manual de usuario
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Instruction
Manual
For generic HA-1
15 class
Sewing Machines
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Your HA-1 Sewing Machine
This is a generic instruction manual for straight stitch
sewing machines that are commonly known as HA-1s.
The HA-1 machine is mechanically a clone of the very
old Singer 15 class, such as the 15-30 or 15-87. Many
later 15 class Singers, such as the 15-91, used a differ-
ent shuttle/bobbin case arrangement which was mostly
reversed from this style. However, this early style be-
came so prevalent that Singer eventually switched back
to the earlier arrangement.
HA-1 machines have been sold with hundreds of dif-
ferent nameplates, but are all essentially the same.
Most of the HA-1 machines have been built in the far
eastern countries since the end of WW2. There have
been numerous modifications, but the basic machine
has remained so similar that this instruction book will
cover the important points for many machines.
The bobbins are the common 15 class, and the needles
are known as 15X1 (US), 705 (H or B, European), or
HAX1 (Japanese or other far eastern), followed by the
# that designates the size. A US size 16 = a European
size 100, size 14 = size 90, size 12 = size 80. The Euro-
pean # tells the actual size of the needle, such as the
100 is 1mm in dia., the 80 is .8mm in dia., etc.
Prepared by:
Bill Holman
Madison, WI
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TO REPLACE THE NEEDLE
To replace the needle, raise
the needle bar to its highest
point by turning the hand
wheel (Fig. 3) TOWARD
YOU by hand. Loosen the
needle clamp screw (A) on the
right hand side, and the needle
clamp will open, allowing the
old needle to slip out.
Remove the old needle and
slide the new needle up,
(FLAT SIDE TO THE
RIGHT) as far as it will go.
When the needle hits the stop,
it is positioned correctly.
Tighten the needle clamp
screw securely. For best re-
sults change needle frequently.
Note: Use only
15X1, 705, or HAX1
class needles.
NEEDLES AND THREAD
Never use a bent needle, nor one with a blunt point, since this
causes imperfect stitches and may cause the needle to break.
Unless the needle is in all the way, flat side to the right, the ma-
chine will not function correctly, and you will not get good results.
The size of the needle should conform to the size of the thread,
and both should be suitable for the material being sewn. In most
applications, use the same thread top and bottom, and always use
good quality thread and needles.
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THE BOBBIN CASE
Important
In the follow-
ing opera-
tions, the nee-
dle must al-
ways be
above the sur-
face of the
machine. In
raising the
needle, al-
ways turn the
hand wheel
toward you.
REMOVING THE BOBBIN CASE
INSERTING THE BOBBIN CASE
Slide or lift the access plate. (Fig. 4) With left thumb and forefin-
ger, open the hinged latch (A-Fig. 2) on the bobbin case, and hold
securely as you withdraw it from the post. (D-Fig. 2) *Note the
position of your fingers on the latch, because it is important to grip
it the same way when reinserting it into the machine.
After installing the bobbin in the case, grip the latch with your fin-
gers in the same position* as when you removed it. (Note: If you
grip it with your fingers pointed directly toward the case, it will be
difficult to install it in the machine.) Guide the bobbin case back
onto the post with the finger (B-Fig. 2) into the notch (C-Fig. 2).
This should be an easy operation requiring no force. When you
release the latch, it will snap onto the groove on the post, and the
three or four inches of thread hanging free from the bobbin case
will be brought up through the needle plate as shown on page 8.
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WINDING THE BOBBIN
Note: This machine uses standard
15 class bobbins. The bobbin can
also be wound while the machine
is in operation by not releasing the
stop motion knob as described be-
low, in which case, machine and
bobbin winder will operate at the
same time.
While holding the hand wheel with the left hand, turn the stop mo-
tion knob toward you. This will permit the hand wheel to turn
freely while the needle bar remains still. Place a spool of thread on
spool pin (A). Pass the thread through the tension disk (B) at right
corner of the base of the machine. Attach the thread to an empty
bobbin by winding it around numerous times or inserting it inside
out through one of the holes. Place the bobbin on spindle (C).
Push the bobbin winder (D) down until the snaps against the hand
wheel, and finger (E) drops between the sides of the bobbin. Oper-
ate the motor until the bobbin is full or the finger (E) snaps up and
disengages the bobbin winder. Do not over fill the bobbin. Cut the
thread, and tighten the stop motion screw while holding the hand
wheel. Your bobbin is now ready to be inserted in the bobbin case
(pg. 6) and installed in the machine (pg. 4).
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TO THREAD THE BOBBIN CASE
Hold the bobbin case between
the left thumb and forefinger
with the slot up. With 4 or 5
inches of thread trailing in the
direction shown…
...insert the bobbin into the bob-
bin case and pull the trailing
thread back into the slot, down
and to the left, until it snaps into
the “delivery eye” under the ten-
sion spring. When you pull on
the thread, looking at the bobbin
in the open side of the bobbin
case, the bobbin should rotate
clockwise.
There should be a slight but
consistent tension (drag) on the
thread as it is pulled through the
“delivery eye.” The tension can
be increased by turning the ten-
sion screw clockwise decreased
by turning it counter-clockwise.
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UPPER THREADING
1– Place a spool of thread on spool pin (A).
2– Bring the thread from the back of the spool, (so that the notch
in the spool is up) and lead it through thread guide (B).
3- Run the thread down, between, and under the tension disks (C)
from back to front.
4– Bring the thread over the guide bar (D) and through the check
spring (E).
5- With the take up lever (F) in its uppermost position, bring the
thread through it from back to front.
6– Run the thread through guides (G) & (H).
7– Thread the needle from left to right, drawing it through about
4-5 inches.
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TO PREPARE FOR SEWING
Thread machine as per pages 6 & 7.
Pick up the bobbin thread by holding the loose end of the needle
thread with your left hand while turning the hand wheel toward
you until the needle moves down and up and the thread take up
lever has reached its highest position.
Pull gently on the needle thread where it is looped down through
the needle plate, and the bobbin thread will come up through the
needle hole. (If the bobbin thread does not come up, recheck your
threading, and be sure that there is 4-5 inches of thread trailing
from the bobbin case.)
Finally, place both thread ends toward the rear of the machine,
with the needle thread going between the two presser foot toes
(A).
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TO START SEWING
TO REMOVE THE WORK
With the needle raised and the threads drawn back at least 4
inches through the toes of the presser foot, place the material
to be sewn beneath the presser foot and lower the presser
foot lift lever. Turn the hand wheel toward you until the nee-
dle enters the material. Regulate the desired stitch length
(Fig. 12) and start sewing.
Do not try to help the feeding of the material by pulling by
hand, as this may bend or break the needle. Gently guide the
material as it feeds in the direction you want to sew.
Stop the machine by releasing the pressure on the foot or
knee control and stopping the hand wheel with your right
hand. If you are stopping to turn a corner, stop with the nee-
dle just entering the material. If you are going to remove the
material, stop with the needle and take up lever at their high-
est positions. Then, raise the presser foot lift lever, draw the
material to the back about 6-8 inches, and cut the thread.
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Fabric Selector: The height of
the feed dog may be regulated
according to the thickness or
other characteristics of the ma-
terial being sewn, by proper
setting of the drop feed knob.
1– When sewing normal to thick materials, turn the knob to
the “NORM” position.
2– When sewing thin materials, such as silk, which require a
gentler feeding motion, turn the knob to “SILK.”
3– When a situation arises when you want to move the ma-
terial by hand, such as in darning or embroidery, turn the
knob to the “DARN” or “EMBR” position.
OTHER FEATURES
PRESSURE CONTROL
The pressure control (Fig. 4, pg. 5) controls the amount of
pressure that the presser foot applies to the material. Differ-
ent HA-1s use two versions of the pressure control, but you
can regulate it by screwing it up and down or using the snap
release, to find the pressure that provides the best feeding
action.
PRESSER FEET & ATTACHMENTS
Your HA-1 is equipped with a standard low shank mounting
system. With this arrangement, it is easy to find almost any
type of presser foot or attachment for your sewing needs.
Fig. 11
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