Consew 733R-5 Use and care manual

LDNSEIN
OPERATING INSTRUCTIONS,
PARTS LIST
MAINTENANCE PROCEDURES
CONSOLIDATED SEWING
MACHINE CORP.
Model
733R-5
EXTRA HEAVY DUTY
LONG ARM
SINGLE NEEDLE
DROP FEED
ALTERNATING
PRESSER FEET
LOCKSTITCH MACHINE
CONSOLIDATED SEWING MACHINE CORP.
COPYRIGHT (01989 CONSOLIDATED SEWING MACHINE CORPORATION
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INTRODUCTION -CONSEWMODEL 733R-5
ConsewModel733R-5 is a single needle,flatbed,type 301 stitch,reverse feed,industrial
sewing machine usedis the fabrication andrepair
of aerial delivery equipment.
ConsewModel 733R-5 is capable
of sewingfabrics thatrange from heavy cotton and
nylonduckto multiple layers
of heavywebbing.
ConsewModel 733R-5 is able to fabricate and install
personnel-,cargo-and
extraction-parachutes, bridle loops,locking stowloops,harnesses and multiple layer
heavywebbing splices.
Preventive Maintenance
Machines should
be keptcoveredwhennot in operationto preventdust and dirt
accumulationwhich,when allowedto buildup,mixes with oil and becomes cakedonthe
machine.
Afteruse, sewingmachines should
be wipeddownwithoil anda soft clothbefore
covering.
Once a weekthe inside of the machine andthe motor should be
blownoutwith shop air if available.Ifshop airis not available, cleanwith a softbristle
brush.
CAUTION: USE EYE PROTECTION WHENUSING SHOP AIR.
Once a yearthe machine shouldbe cleanedwith a solvent such as Freon, then
immediatelyoiledthoroughly to preventrustand corrosion.
CAUTION: ENSURE GOODVENTILATION WHENUSING SOLVENTS.
Whenthe machines are in constantuse theyshould be oiledatleast twice daily.
Usingtheproperoil is of utmostimportance. For lubrication of the machine,onlygood
quality sewingmachine oil shoud
be used.
a. Oilingpoints are shownin figures 10 and 11.
b.
Use one drop at each oilingpoint.
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SECTION I1 OPERATING INSTRUCTIONSAND
MAINTENANCE PROCEDURES
Characteristics and Capacity
The CONSEW Model 733R-5 singleneedle,extraheavy duty lockstitch machine is
designed for sewing canvas,tents,sails,hamesses,safetybelts,webbing and similar
products.
It is equipped with altematingpressers,drop feed and a long-beakoscillating shuttle on a
horizontal axis.It has a
cleanceof25.4mm(l" )under the presser foot. Clearance,on
bed,at right
of needle is413mm(16 t;4' )and length ofbcd 655mm(25-3/4")
The machine is equippedwitha stitching reverse lever whichalso regulates stitches in
length from 3 to 13mm(2to 8 stitches perinch).
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Alternating pressers consist ofavibrating presser foot and alifting presser foot working
in combination.In operation,the pressers alternately press down on the material,the
vibrating presser working in unison with the feed, so that there is no slipping of the two
or more plies ofmaterial which are being sewn. Additional features include pedal
operated presser foot lift
and reverse.The maximum operating speed is 550 stitches per
minute.
The balance wheel always rotates towards the operator.
THREAD AND NEEDLE SELECTION
THREAD
Left twist thread should be used in the needle. For the bobbin,either right twist or left
twist
can be used.
Fig.1 How to determine the twist
Hold the thread as shown in Fig.1 . Turn the thread over toward you between the thumb
and forefinger ofthe right hand .Ifleft twist, the strands will wing tighter.Ifright twist,
the strands will unravel.
NEEDLE
Needles recommended for Consew machine Model 733R-5 are as follows;
For Cloth
Schmetz-1
000 Series available in sizes 230,250,280,and 300
Schmetz-1000H Series available in sizes 160,200,230,
250,280,300,330
For Leather(Special orders only)
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Schmetz- J.003D Series,triangularpoint,available in sizes 230,250,280
Schnietz- 1 OOODB 1Series- wide diamond point available in sizes 280
Schmetz- lOOOLL Series,narrow twist point,available in sizes 250,280
Schmetz- J.OOOLR Series,narrowreverse twist point,available in sizes 300
Schmetz lOOO.Q Series,square point,available in sizes 280,300
The size of the needle to be used depends upon the size of the thread which must pass
freely through the
eye ofthe needle.
Do not use rough or uneven thread or thread which passes with difficulty through the
needle eye,as such thread will interfere with the successful use
of the machine.
TO REMOVE THE BOBBIN
Rotate the balance wheel bringing the needle bar to its lowest position.Then with the
curved part
of the shuttle cylinder opener t35225,which should conform to the curve of
the should,
as shown in Fig.2,insert the small end of the shuttle cylinder opener into Slot
Ain the spring latch under the shuttle cylinder(Fig.2).
Fig.2 use
of Shuttle Cylinder Opener(35225)
4. WINDING BOBBINS
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The bobbinwinder ismounted on the tabletop as showninFig.3 with its pulley in front
of the driving belt so that the pulleywill separate from thebelt after the bobbinhas been
wound with sufficientthread.
Push the bobbin
on the bobbin spindle {l,Fig.3)as far as itwill go.Pass the threadfrom
thread stand downward throughthe eye in thetension bracket.Then betweenandaround
the back
of thetension discs,bring the threadforward toward the bobbinandwind from
below in clockwise directionseveral times around thebobbin.Push bobbinwinder lever
{3,Fig.3)downwarduntil the wheel{2,Fig.3)contactsthe drive belt andstartthe
machine.
Afterbobbin is filledwith thread,release will causethe wheel to disengagefrom the belt
andwinding will stop.
Cutthe thread andremove the bobbin fromthe bobbin spindle.
The adjustment screw{S,Fig.3)can
be turned in or outto increase or decreasethe
amount
of the threadwound onthe bobbin.
When fine thread iswound
on bobbins,use lighttension.ltis regulated by turning the
knurlednut{6,Fig.3)on the tensionbracket at the rear
of the bobbinwinder.
Bobbincan
be woundwhile the machine issewing.
If the thread does not wind evenly onbobbins,loosen the screw(4,Fig.3)andmovethe
bracketto the right
or left as required,thentighten the screw.
6
3
Fig.3,winding Bobbins
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5.TO REPLACE THE BOBBINAND THREADTHE SHUTTLE
Hold the bobbinbetweenthe thumb and indexfinger
of the lefthand,atthe sane timethe
thread is drawing offfrom the undersidetoward the right as shown
in Fig.4.Place the
bobbin
in the cylinderas far as it will go,draw the threadinthe slot B,Fig.4in the
cylinder and under thetension spring,then into thedelivery eyeA.Fig.4,thenpushthe
cylinderbackuntil
it is locked by thespring latch,and allow about3 inches of threadto
hang free from theshuttle Fig.S so that
it canbe drawnup through the throatplate,as
noted in Fig.
8.
Fig.4 BobbinReplacement andThreading the Shuttle
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Fig.5 Bobbinreplaced andShuttle thread
6.TO SETTHE NEEDLE
Rotate the balance wheeluntil the needle
bar has reached its highestpositon.Loosen the
set screw
in theneedle clamp and placethe needle up intothe clamp as faras it will go.
The long groove
of the needle mustbefacing left and theeye in line withthe arm of the
machine.Then tighten the setscrew.
7
.TO THREAD THENEEDLE
With operatorfacing front
of machine, tum balance wheel,until the threadtake-up lever,
(Fig.6)reaches its highest position.
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Fig.6 Threading theneedle
Openthe lid ofCup C;pass the threadfrom the cotton standdownward through the hole
in the right side
of cup,thenthrough thethread post 1 undesthe lid ,then throughthe hole
in the left
sideofcup.Then close thelid and pass thethread through the threadguide 2,
over from righttoleftbetween the threadretainer discs 3,down underand from thread
guide
13 to letaround the tension wheel4,into the
loop
of the threadtake-up spring S,underthestaple 6,Figs.6 and 7,upand from backto
front through the hole7,inthe threadtake-uplever,down throughthe thread guide
8,
Fig.7 into the slot9 in the vibratingpresser bar,intothread guide 10 onthe needle
clamp,and from lefttoright through the eye
of the needle 11 thenpass thethread down
through the hole inthe lifting presser foot 12. Draw about fourinches
of threadthrough
the hole
of thelifting presser foot withwhich to pull upthe bobbin thread as shown in
Fig.8.
Note:Ifthread lubrication isnotrequired,omit thread fromcup C Fig.6 andstsrt
threading machine atthread guide 2(Fig.6.)
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7
Fig.7 Threading theNeedle
B.
TO PREPARE FOR SEWING
With the
left hand hold the end of the needlethread,leaving it slack fromthe hand to the
needle.
Turn the balance wheel until theneedle moves down and up again to itshighest
position,thus catching
the bobbinthread;draw up the needle thread and the bobbin
thread will come up with it through thehole in the throatplate(see Fig.8)Lay both
threads back under thepresser feet.
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Fig. 8 Drawing up the Bobbin Thread
9. TO COMMENCE SEWING
Place the material beneath the presser feet,lower the
presser feet and turn the balance wheel over toward you
to begin sewing.
10 • TO REMOVE THE WORK
Stop the machine with the thread take-up lever at rest
in its highest position;draw about three inches of
thread through the thread retaining discs,raise the
presser feet,draw the work back and cut the threads
close to the goods. Leave the ends of the threads under
the presser feet.
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11. REGULATING THE THREAD TENSIONS
A.
For ordinary stitching,the tension of the needle and
bobbin threads should be equal so as to lock both threads
in the center of the fabric.If the tension on either
thread is stronger than on the other,imperfect stitching
will be the result.
If the tension on the needle thread is greater than that
on the lower thread,it will be straight along the upper
surface of the fabric.
If the tension on the bobbin thread is greater than that
on the needle thread,the bobbin thread will lie straight
along the underside of the fabric.
Fig.9
The tension the needle thread is regulated by the
thumb nut H Fig.11 at the front of the thread
retaining discs and the thumb nut J Fig.11
at the front of the tension wheel.The tension on the
thread retaining discs should be only enough to cause
the tension wheel to turn when the thread is taken from
the spool.
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B. The tension on the bobbin threadis regulated by thescrew C Fig.5 whichholds the
tension spring to thecylinder.To increase the tension,tumthe screw to theright.To
decrease the tension,
tum thescrew to the left.
12.TO REGULATE THE LENGTHOF STITCHAND REVERSE LEVER
The length
of stitchis regulated by looseningthe serrated nut on the reverse leverGFig.
10 inthe slot on the front of the uprightpart of the arm. To lengthen the stitch,movethe
lever downward.
To shortenthe stitch,movethe lever upward andthen tighten the nut.
When making reverse stitchmove the leverupwardas far as itwill go.
13.TO REGULATE THE PRESSURE ON THE MATERIAL
The pressure onthematerial is regulated bymeans
of the hexagonhead screw D,Fig.lO.
Loosen the hexagon locknut,E, F g.l 0 and tum the screw 1)tothe right to increasethe
pressure orto theleft to decrease thepressure.When the desired pressurehas been
obtained,holdthe screw
Dwith a wrenchtokeep it from turningwhile the locknut(E)is
beingtightened against thebracket(F).
Thepressure should
be only heavy enoughtoenable the feed tomove the work along
evenly,andto preventthe workfrom rising with theneedle.
Fig. 10 Oiling Points at front of Machine
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14.TO OILTHE MACHINE
Toinsure easy running andpreventunnecessary wear
of the machine,oil all partswhich
are inmovable contact.Whenthe machine is incontinuous use,oil should
be applied
frequently.Theplaces where the machineshould
be oiled areindicated in Figs .1 0 and 11
by arrows pointing tothe oil holes andbearings.Important Note: The oilholes on the
machine are indicated
by a red circle aroundthe oil hole.Oil should be regularly applied
to the shuttle race.
Fig.11 OilingPoints at Back ofMachine
On the back ofthe arm is acover,fastened by two knurled screws loosenthe screws and
remove cover.Careshoula
be taken to see that all themoving parts inside aresufficiently
lubricated.Replace coverinto positionand tighten the twoscrews.
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SECTION III
BASICADJUSTMENTS
l.TO SETTHE NEEDLE BAR
When the shuttlepointis at the cener of the needle,the top of the needle eyeshould be
approximately(0.8m.m)l/32,below the point
ofthe shuttle.
Fig.12 Setting the NeedleBar
Toadjust,loosen the two setscrews "0" Fig.12 and move theneedle har up or down as
required,then securelytighten theset screws.
NOTE- This setting of the needle bar may be varied slightlydepending upon the size of
the needle and thethread being used.
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2. TO SETTHE SHUTTLE WITHRELATION TOTHENEEDLE
The shuttle can
be adjusted for proper clearancebetweenthe shuttle pointand the needle.
If a change ismade from a verysmall needle to amuch larger one,theshuttle point will
perhaps pass too closeto the needle,or toofar away from it,ifthe change is froma large
to a much smallerneedle.
Fig.13 Setting the shuttle with Relation to the Needle
In such cases,loosen theclamping screw(P),Fig.l3 beneaththemachine bed,and move
the shuttle race slightlyto right
or leftto suit the needlebeing used,then securely tighten
the clamping screw(P).
3.TO TIME THEFEED
Forgeneral sewing conditions,thefeed do shoula beso timed that
it will have completed
its feeding action atapproximately the same time that the take-uplever N Fig.12
completes its upward stroke.
Whenthe machines leavethe factoryt THEYARE PROPERLY TIMED,ANDNO
ADJUSTMENT IS MECESSARY UNLESSTHE POSITION OFTHE FEED CAM
HAS BEEN DISTURBED.
If adjustment shoula be considered necessary,remove the arm sidecover at the rearside
of the machine arm.Thefeed cam is easilyaccessible with the armside cover removed.
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This cam is providedwith two screws.Loosen thesetwo screws and setthe cam for
earlier
or latermovement of the feed dog,asrequired,by turning the camabout the arm
shaft to the requiredposition,then securely tighten thetwo screws
in thecam.
4.
HOWTOSETHANDWHEEL
The handwheel(35008)is packed separaelyandmust be positioned on main shaftprior
to operating the machine.
Remove the two screws(35009)andslide
off thebushing that is seton the shaft.Then set
the handwheel ontheshaft using the twobushing screws 35009.See Fig.14.
hand wheel
Fig .14 Setting the Handwheel
.. ')
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SECTION IV
TROUBLE SHOOTING
This section contains trouble-shooying information which can be of help
in determining and removing the causes of trouble that may develop in
the machine.When the troubles covered by this section develop, they
can be conveniently tracked down and readlly correctedbu consulting
the following tabulation:
SYMPTOM CAUSE
REMEDY
Needle breakage.
Needle is loose
in Tighten needle
clamp.
needle
clamp.
Needle
of incorrect class Compare needle with one
and style is being used.
of correct type.
Presser foot is loose or
Straighten and align
out of line. presser foot;tighten securely.
Needle is too light for
Select the correct needle.
material being sewn.
Operator is pulling the DO NOT assist machine in
material being sewn. feeding of material.
Thread breakage
(Needle).
Thread is too heavy for Select and inaert a thicker
needle being used.
needle.
Right twist thread is
Only~ twist
thread
being used.
is to be used.
Damp or defective thread
Use new, dry and smooth
is being used.
thread of correct size.
Machine is incorrestly Follow threading diagram
thread.
as shown.
Needle is incorrectly
Set the needle with the
set.
short groove closest
to
the
loop taker(shuttle).
Upper tension is too
Adjust for correct stitch
tight. balance.
Thread take-up spring
Adjust to
proper position.
is out of adjustment.
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s
(
SYMPTOM
Thread breakage
(Needle)
(Continued) :
Thread breakage
(Bobbin)
ippinng
ship atitches)
D rawing of Seam.
s
0
titches uneven
r piled up.
CAUSE
Needle is rubbing
against presser foot.
Needle is defective,
blunt or bent at point.
:·
Sharp edge on the loop
taker
(shuttle),bobbin
case or tension contollers.
Damp or defective
thread
being used.
Bobbin thread tension is
too tight.
Bonnin shuttle case is
incorrectly threaded.
Bobbin is wound too full
to revolve freely.
Rounds of thrad on the
bobbin are lapped over
one another.
Bobbin case is sticky with
gummy oil and lint.
Shrap eage on shuttle,
bobbin case,bobbin or
needle.
The needle thread fails
to catch the bobbin.
The threads draw or
pucker the seam.
Stitches pile up in one
place
REMEDY
Re-align and tighten
presser foot.
Replace with new needle.
Smooth with fine emery paper
and polish with rouge cloth.
Use new,dry and smooth
thread of correct size.
Adjust for correct
stitch balance.
Follow threading
instruction
as described.
Remove excess thread to the
rim of the bobbin.Adjust
bobbin winder accordingly.
Unwind bobbin manually and
rewind evenly and uniformly.
Clean bobbin case,shutte and
shuttle race with kerosene or
naphtha,then lubricate with a
few
drops of oil.
Smooth with fine emergy paper
and polish with rouge cloth.
Reset the needle har
and
needle as described.
Adjust tensions for correct
stj tch balance.
Adjust stitch regulation for
longer stitch.
Increase presser
foot pressure.
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1 '\ Casting mechanism
30
8
4
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