CONTENTS |
|
INSTALLATION ............................................................................................................. |
3 |
LUBRICATION ................................................................................................................. |
4 |
OPERAOR INFORMATION ......................................................................................... |
4-7 |
ADJUSTMENTS................................................................................................................ |
7-14 |
INDEX |
|
INSTALLATION ............................................................................................................. |
3 |
LUBRICATION ............................................................................................................... |
4 |
ARM SHAFT .................................................................................................................... |
4 |
BED SHAFT ..................................................................................................................... |
4 |
OTHER POINTS ............................................................................................................. |
4 |
SPEED ............................................................................................................................... |
5 |
NEEDLES ......................................................................................................................... |
5 |
SETTING .......................................................................................................................... |
5 |
THREADING ................................................................................................................... |
6 |
UPPER .............................................................................................................................. |
6 |
LOWER ............................................................................................................................ |
6 |
PRESSER FOOT. PRESSURE ....................................................................................... |
7 |
TENSION .......................................................................................................................... |
7 |
PRESSER BAR. HEIGHT .............................................................................................. |
8 |
STITCH LENGTH .......................................................................................................... |
8 |
FEED BAR. HEIGHT ..................................................................................................... |
9 |
FEED DOG. CENTRALIZING ...................................................................................... |
9 |
HEIGHT ........................................................................................................................... |
9 |
LENGTHWISE SETTING ............................................................................................. |
9 |
SIDEWISE SETTING ..................................................................................................... |
9 |
TIMING .......................................................................................................................... |
10 |
LOOP DEFLECTOR ..................................................................................................... |
10 |
NEEDLE BAR. POSITION .......................................................................................... |
10 |
LOOPER. POSITIONING ............................................................................................ |
11 |
LENGTHWISE SEETING ........................................................................................... |
11 |
SIDEWISE SETTING ................................................................................................... |
11 |
NEEDLE BAR. HEIGHT ............................................................................................. |
11 |
TIMING .......................................................................................................................... |
12 |
NEEDLE GUARD ......................................................................................................... |
12 |
SPREADER. POSITIONING......................................................................................... |
13 |
LENGTHWISE SETTING ........................................................................................... |
13 |
SIDEWISE AND HEIGHT SETTING ......................................................................... |
13 |
TAKE-UP. ADJUSTMENT ........................................................................................... |
14 |
LOOPER THREAD ....................................................................................................... |
14 |
NEEDLE THREAD ....................................................................................................... |
14 |
RELEASER .................................................................................................................... |
14 |
1 |
|
From the library of: Superior Sewing Machine & Supply LLC
INTRUCTIONS FOR USING
ANTI-REVERSING MECHAINISM
ON MACHINES OF CLASSE 300U
Machine 300U1C, are equipped with an ANTI-REVERSING device.
To release the device, depress button located on right side of bed plate, hold down and turn machine pulley either forward or backward.
To engage the device, release button and turn machine pulley toward rear of machine until device “snaps” into place.
TO RELEASE
PRESS DOWN,
HOLD AND TURN
MACHINE PULLEY
TO ENGAGE
RELEASE BUTTON
AND TURN PULLEY
BACKWARDS
•
• •<l.
EQUALIZING THE FEEDING MOVEMENT OF THE NEEDLE FEED AND DROP FEED ON MACHINES OF CLASSE 300U
The needle feed and drop feed should not only be timed to move simultaneously, but should also move the same distance during feeding. If the drop feed moves a greater or less distance than the needle feed, depress the stitch length button and turn the machine pulley, as required, to cause the drop feed movement to equal the needle feed movement. The stitch length of both feeds can then be reset simultaneously, as described on page 8.
2
From the library of: Superior Sewing Machine & Supply LLC
OIL PAN
HANGERS
OIL PAN
Fig. 3
FOOT LIFTER
LEVER
Fig. 4
Fig.2
INSTALLATION
Assemble oil pan to hangers. Insert assembled oil pan into machine cut-out of table pacing four rubber bushings in hanger holes as shown in Fig. 2. Attach oil drain jar
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to oil pan as shown in Fig. 3. |
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Place machine on oil pa |
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assembly with the four bed pins |
|
|
passing through the four rubber |
|
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bushings shown in Fig. 2. |
|
( |
Connect foot lifter treadle |
to |
foot lifter lever, Fig.4, at back |
of |
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machine by chain furnished for this 0 purpose.
3
From the library of: Superior Sewing Machine & Supply LLC
LUBRICATION
Machines of class 300U have a semi-automatic lubricating system comprising a hollow arm shaft and a hollow bed shaft which act as oil reservoirs. The oil is distributed to all of the principal bearings by centrifugal force through small jets in the shafts when the machine is in operation. Provision is also made of hand lubricating other movable parts which are not lubricated from the reservoirs.
Do not use additives in sewing machine oil as they may cause a reduction in the normal flow of oil that can result in damage to the machine.
BEFORE STARTING machine, the machine must be oiled as instructed. Failure to do this will result in damage to the machine.
Pressure Oil Can, furnished with the machine, is to be used to oil all points requiring lubrication.
TO OIL ARM SHAFT
To fill arm shaft reservoir, insert spout of pressure oil can in hole, Fig.5, and inject 1 shot of oil into shaft twice daily.
TO OIL BED SHAFT
To fill bed shaft reservoir, push spring cover, Fig. 6, to the left, insert spout of pressure oil can into hole and inject 1 shoe of oil into shaft twice daily. Close oil hole spring cover.
NOTE: Bed shaft may also be oiled from right hand end of machine.
OTHER OILING POINGS
Apply oil to all work plate and arm oil holes, needle bar bearings and connections, needle bar rock frame bearings, looper rocker sleeve and presser lifting mechanism.
CAUTION: For machines in continuous use, all oiling points
must be oiled daily, Occasionally oil tension release mechanism and looper pull-out rack.
4
INJECT l SHOT
T WICE DAILY
Fig. 5
SPRING
COVER
Fig. 6
From the library of: Superior Sewing Machine & Supply LLC
LOOSEN
SCREW
MOVE TO
HIGHEST POINT--~~--
SCARF OF NEEDLE
TOWARD LEFT
MOVE TO
HIGNEST POINT
SCARF OF NEEDLE
TOWARD LEFT
Fig. 7
For heavier weight material, needle Catalog 4112 (62x59) may also be used. In this cause, the needle bar must be adjust as instructed on page 10.
The size of the needle to be used is determined by the size of the thread which must pass freely through the eye of the needle.
Orders for needles should specify quantity required, size number and catalog number.
To Set The Needle
Turn machine pulley over toward the operator until the needle bar is at its highest point, as shown in Fig. 7.
Loosen needle set screw on single
LOOSEN
SCREWS needle machines or needle clamping screws on multiple needle machines, as shown in Fig. 7.
Insert needle into needle bar or clamp as far as it will go making certain that the scarf of each needle faces toward the left, as shown in Fig. 7.
THREAD
Either left twist or right twist thread may be used in the needles and loopers.
Rough or uneven thread, or thread which passes through the needle eye with difficulty will interfere with successful operation of the machine.
5
From the library of: Superior Sewing Machine & Supply LLC
NEEDLE THREADS
Fig. 9
MOREA
TENSION.-:.--
Fig. 10
PRESSER BAR
SPRING FORK
Fig. 11
LESS TENSION
TENSION
Tension on thread should be light as possible while still sufficient to set the stitch correctly in material.
Needle Thread Tension
To regulate needle thread tension, turn thumb screw, indicated in Fig. 9, as may be required.
LOOPER
THREADS
7
~
IMPORTANT: Regulate needle thread tension only when presser foot is down.
Looper Thread Tension
LOWER LOCK NUT
To regulate looper thread tension, turn thumb screws, as indicated in Fig. 10, as may be required.
Altemating Presser with
Penumatic Pressure Control:
Adjust height of Pressure Cylinder with presser feet resting on throat plate. There should be a clearance of 6.4mm between the Presser Bar Spring Fork and the bottom of the cylinder. To raise cylinder, loosen lower lock nut and tighten upper lock nut, see Fig. 11. To lower cylinder, lossen upper lock nut and tighten lower lock nut. When correct adjustment is attained,k tighten both lock nuts.
Resulate air pressure. The correct air pressure is set for average feeding when the Presser bar spring For rises to approximately 1.9mm from the bottom of the cylinder.
7
From the library of: Superior Sewing Machine & Supply LLC
STITCH LENGTH
To adjust the stitch length, depress plunger, Fig. 12, located on top of arm. Continue to hold plunger down and turn machine pulley toward operator until plunger enters notch in arm shaft eccentric. Then turn plunger to lock in position. Depress button, Fig 12, located on machine bed. Hold down, and turn machine pulley toward operator to increase length of stitch, or away from operator to decrease length of stitch, letter “A’ on machine pulley indicates the longest stitch. When desired length, indicated by letter, is opposite arrow on front of machine, release button and turn plunger to right or left until it springs outward.
Machines with Alternating Pressers
The lift of the vibrating and lifting pressers is controlled by an adjustable eccentric. To adjust, remove arm cover at rear of machine. Turn machine pulley over toward operator until feeding presser is down. Loosen the two lock screws, Fig. 13, and the two clamp screws. Insert screw driver into notch of adjusting disc, and turn machine pulley as indicated in Fig. 13. Then tighten the two clamp screws and the two lock screws.
When it is desirable to have either one of the pressers lift higher than the other, turn machine pulley over toward operator until the lifting presser is at its highest position. Loosen the two clamp screws, Fig.14, and turn lifting rock shaft crank up or down until desired lift of each presser is attained. Then tighten the two clamp screws
FOR
LOCK
SCREW
Fig. 13
8
Fig. 12
CAUTION: Limit lift of pressers to minimum required for the work, as this permits higher speeds.
The vibrating presser should be timed so that under normal sewing conditions, the presser foot will seat on the material at approximately the same time the needle enters material. This timing can be advanced or retarded slightly depending on the type of operation being performed, such as sewing over seams. To adjust, loosen two holding screws, Fig. 14, not more than one half turn. Then turn the adjustable eccentric, Fig. 13, until the vibrating presser seats at the correct time. Securely tighten the two holding screws after adjustment is made.
HOLDING
SCREWS
CLAMP
SCREWS
,Fig.14
From the library of: Superior Sewing Machine & Supply LLC
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