HIGHLEAD GC22618-1B User manual

iii.
® HIGHLEAD
GC22618-1B
Cylinder-Bed Unison Feed
Sewing Machine
INSTRUCTION MANUAL
CATALOG
From the library of: Diamond Needle Corp

1. Safety precautions:
1) When turning the power on, keep your hands and fingers away from the
area around/under the needle and the area around the pulley.
2) Power must be turned
off when the machine is not in use, or when the
operator leaves the seat.
3) Power must be turned
off when tilting the machine head, installing or
removing the "V" belt, adjusting the machine, or when replacing.
4) Avoid placing fingers, hairs, bars etc., near the pulley,
"V" belt, bobbin
winder pulley, or motor when the machine is in operation.
5) Do not insert fingers into the thread take-up cover, under/around the
needle,
or pulley when the machine is in operation.
2. Precautions before starting operation:
1) When a new sewing machine is first turned on, verify the rotational
direction
of the pulley with the power on.
2) Verify the voltage and phase (single or three) with those given on the
machine nameplate.
3. Precautions for operating conditions:
1) Avoid using the machine at abnormally high temperatures (35°C or
higher)
or low temperatures (5 OC or lower) .
2) Avoid using the machine in dusty conditions.
4. Specifications:
Max. Sewing Speed (rpm) 2,200
Needle
DPX17 22#
Needle Bar Stroke (mm) 34.2
Thread Take-up Lever
~troke (mm) 72.1
Max.Stitch Length (mm) 6
Presser Foot Stroke
Byhand(mm)
8
By knee (mm) 14
Alternating Movement (mm) 2.0-6.0
1
From the library of: Diamond Needle Corp

5. Preparation before starting operation:
1) CleaniDg1he machine
Before leaving the factory, the machine parts are coated with
rust-preventive grease, which may be hardened and c:ontamioated by dust
duringstoJage and shipment. Thisgrease must be removed withgasoline.
1) Examination
Though evay machine is inspeded and tested slricdy before leaving the
factory, the machine parts may be loose or deformed after long distance
banspotlalion. ~ joiL A thorough examination must be performed after
cleaning the machine.. Tmn the balance wheel to see if there is running
obsbuclion, parts collision, uneven resislance or abnormal noise. If these exist,
adjuslmcot must be made accordinglybefore run-in operation.
3) Lubrication
When a new machine begins to be used or an old machine which left out of
use for a long time is to be used again, it must be lubricated fully. (fhe spots
wbich anowheads ~need to be lubricated.Fig.l)
Please use~ spindle oil
Please ap6ft pnsser foot wheo the machine is operated without
material.
Fig. I
2
From the library of: Diamond Needle Corp

4) Run-in operation
A new machine runs at a low speed (1600rpm) for about a month after
being lubricated sufficiently, each of parts will achieve its best state. Then
increasing speed to the maximmn according to the natme of the work musl he
done.
6. How to attach a needle (Fig.2):
Note: Beforeattach the needle, be sure to tmnthe power switch ofi.
This machine 's needle size is DPX17 #122. Needle size must be selected
according to the thread rightly. (Thread need to pass the pinhole of the needle
freely.)
Insert the needle until it boaoms. and
tighten the screw keeping the lang
groove in the needle facing to 1he left:.
Longgroove
facing to the .
left X
Fig..2
7. Winding the lower thn2d: (Fig.3):
X
1) Push a bobbin on r--------------.,.
the bobbin winder
spindle (3) as far as it
will go.
2) Pull out the
thnnn and wind thread
around the bobbin for
several circles clockwise;
F"rg.. 3
3
From the library of: Diamond Needle Corp

-----
3) Push the lever 4 backward so that the wheel of the pulley touches the
"V" belt, then start the machine.
4) The pulley will separate from the "V" belt automatically after the
bobbin is filled with thread.
8. Adjustment of the bobbin winder: (Fig.3):
I) In case of uneven winding
Loosen the screw 5
in the tension bracket and move the bracket to the
right orto the left as may be required.
2) Adjustment of the amount ofthe thread
Adjusting screw 6 can adjust the amount
of the thread. Tightening the
screw will increase the amount, otherwise the amount
of the thread will
decrease.
3) Winding strength
Adjusting the nut 7 can adjust the winding strength.
Adjusting screw 6 can adjust the amount
of the thread. Tightening the
screw will increase the amount, otherwise the amount
of the thread will
decrease.
9. How to route the upper thread (Fig.4):
Raise needle bar to its highest possible position, and perform threading as
shown in Fig.
Fig.4 Fig.S
4
From the library of: Diamond Needle Corp

10. Removing and inserting the bobbin (Fig.5):
1) Taking out the bobbin: open the cover, take out the bobbin.
2) Inserting the bobbin: replace the bobbin into the shuttle bobbin case,
shutdown the cover. Be sure to make the bobbin rotate counterclockwise and
pull out the thrum.
11. Adjustment of the thread tension (Fig.6, 7, 8):
1) The tension of the upper and lower
thread must be equal so as to adopt normal stitch.
(Fig.6 a)
2) Tension
of the upper
thread (Fig.7)
Before adjusting the
tension
of the upper thread, it
should be certain that the
presser foot
is let down but
not in other position.
Adjusting the thumb nut can
adjust the tension
of the
upper thread. Rotating the
thumb nut clockwise, the
tension
of the upper thread
will increase. Otherwise, the
tension
of the upper thread
will decrease.
3) Tension
of the lower
thread (Fig.S)
Turning the large screw
clockwise will increase the
tension
of the lower thread.
Fig.6
5
:. T]cJCJif:fOC!CJ-
Fig.7
Fig.S
a
b
c
From the library of: Diamond Needle Corp

Otherwise, the tension of the lower thread will decrease.
12. Adjustment of presserfoot pressure (Fig.9):
I) Pressure should be adjusted according to the
material to be sewn.
2) Pressure on both the walking foot and the
presser foot can be adjusted.
3) Sewing pressure should be adjusted to the
minimum required strength.
Fig.9
13. Adjustment of walking foot and presserfoot:
1) Adjustment of alternating movement (FiglO):
(I) The alternating movement on ...---------------.....,
the walking foot and presser foot can
be adjusted by using adjusting dial
located on the top cover.
Dial
(2) Face the desired number
printed on the dial to the matching
mark located on the top cover. The
number printed on the dial represents
the possible protrusion
of the walking
foot and presser foot from the throat
plate when the alternating movements
on these are evenly set.
Presser foot
(3) The alternating movements
can be readjusted
up to 2.0-6.0mm.
~Walking foot
kto-5.~
h ?????
Fig.IO
2) To change the balance of the alternating movements between the
walking foot and presser foot (Fig.ll):
(I) To increase the rise of the walking foot and decrease the rise of the
presser foot:
CD Remove the rubber plug of top cover.
6
From the library of: Diamond Needle Corp

® Rotate the pulley until the presser foot
is slightly raised from the throatplate.
@ Loosen screw "A" (on the right side)
@ The built-in spring pulls down the
presser foot until it makes contact with the throat
plate. Tighten the screw "A".
@ After this adjustment, the protrusion of
the presser foot has been decreased by a set
distance. And the same distance has increased
Rubber plug
•&I; t
shaft crank
the vertical motion of the walking foot. Fig. II
(2) As a contrary case (1) , to decrease the rise of the walking foot and
increase the rise
of presser foot as follows:
Fist, rotate the pulley until the walking foot is slightly raised from the
throat plate. Next, loosen screw "A". Finally, tighten screw "A". This decreases
Lte rise of the walking foot.
3) Installing the feed
regulator
bracket (Fig.12):
Note:
If the feed
regulator bracket is poorly
positioned, the resultant
alternating movements may
be too short
or long,
causing defective machine
operation.
(1) Set the clearance
between special screw
"A"
located on the regulator stud
and the side wall
of the
machine
arm to 26.5mm as
Fig.12. Fig.l2
7
From the library of: Diamond Needle Corp

(2) With the feed regulator stud held as explained is step (1) above,
adjust the feed regulator bracket. This adjustment should insure a clearance
of
12mm between the periphery of pin "B" located on the feed regulator bracket
and the top cover mounting face located on the arm. Tighten screw "C".
4) Feed pitch adjustment of walking foot (Fig.13):
The ratio
of the upper feed amount (of the walking foot) to the lower feed
amount
(of the feed dog) has been adjusted to 1:1. Hawe¥er,lhe..walking. fo.ot
feeding amount can be increased or decreased depending on the operating
conditions. Loosen the nut located on the upper feed rock shaft crank (left), and
shift to adjust the position
of the pivot bracket
upward
or downward.
Upper position-Feed pitch-Small
Lower position- Feed pitch- Large
Fig.l3 Fig.l4
14. Adjustment of stitch length and reverse sewing
(Fig.14):
I) To change the stitch length, rotate the stitch length adjusting dial.
2) Pressing the stitch length adjusting lever for reverse stitching.
15. Safety clutch device: (Fig.15, 16, 17, 18):
Safety clutch device is installed to prevent the hook and cog belt from
8
From the library of: Diamond Needle Corp

damage in case th e thread is caught into the hook when the mach in e is loaded
abn
orma ll y during operation.
1) Function of safety clutch.
(I) When th e safety clutch acts, the cog belt pull ey will be unloaded. Then
the rotation of ho ok shaft wi ll stop. The a rm shaft only wi ll rotate. Stop the
ope ration of machine.
(2) Clean the thread thoroughly
wh i ch is caug ht into the hook.
(3) Turn the
cog belt hub by hand, and check
Whether the hook shaft r
otates li ghtly and
properly, place the clutch dei
ce as follows.
Fig.
IS
Fig. l6
2) How to set the safety clutch.
( I) Wh il e pressing do wn the push button on the opposite side of bed by
left hand, turn the balance wh
ee l sl ow ly by ri ght hand away from yo u as sh ow n
in the
fi gure.
(2) The ba lance wheel will stop by the gear plate, but tum the balance
wheel more firml
y.
(3) Relea se the push button.
(4) As shown in the Figure, the safety clutch device is set.
3) Force applied to the safety clutch
(I) The force app li ed to the safety clutch is the smallest when the white
mark
of the eccentric pin faces the ce nter of the lower shaft. The force
proportiona
ll y increases as the white mark faces the outsid e.
9
From the library of: Diamond Needle Corp