Singer 257000 Скачать руководство пользователя страница 1 | Manualshive

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From the library of: Superior Sewing Machine & Supply LLC

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Содержание 257000

Страница 1: ...Four Buttonhole Sewing Units and One Operator A Trademark of The SINGER COMPANY THE SINGER COMPANY Copyright 1965by The Singer Company Copyright under International Copyright Union All Rights Reserved under Inter American Copyright Union Printed in U S A From the library of Superior Sewing Machine Supply LLC ...

Страница 2: ...Lubricotion 9 10 Machine 3 Machine Base 5 Machine Bed 5 Machine Belt Guord 5 Machine Driving Belt 8 Mochine Hinge Connection Bracket 5 Mochine Lubrication 9 10 Machine Rest Position 10 14 Machine Speed 10 Magnetic Clutch 10 15 Magnetic Clutch Cleaning 25 Magnetic Clutch Lubrication 9 Magnetic Clutch Testing 21 25 Magnetic Motor Starter 15 Main Fuse 20 Main Power Switch 9 10 14 Manuol Starting Leve...

Страница 3: ...Machine regularly supplied with feed wheel for 120 stitches per buttonhole j j L With equal ease machine handles resin finished cottons cotton and synthetic blends 100 synthetics and silks A counter automatically stops machine before bob bin thread runs out Red Indicator Light informs opera tor of reason for stoppage If needle thread breaks buttonhole knife is auto matically prevented from cutting...

Страница 4: ...ASUGO E f S BUTTQN Stand up Operation Producing Buttonholes on 260 Dozen Dress or Sport Shirt Fronts per Day CLASS 256 MACHINE AREA 80 SQUARE FEET From the library of Superior Sewing Machine Supply LLC ...

Страница 5: ... Machine should rest on all four cushion caps at four corners of machine bed Remove machine hinge connection bracket after removing two bracket screws Insert hinge connection in rear hinge connection hole in machine bed with open side of connection UP Position connection bracket over hinge connection To prevent rocking of machine during machine starting and clamp lifting movements press bracket do...

Страница 6: ... start lever to bracket with hinge screw Upright section of start lever must face operator at front of unit Start lever should be mounted on left face of upright section of bracket Place coil of lever spring around threaded portion of hinge screw and tail end of spring hooked over rear section of start lever as shown Place washer and nut on hinge screw tight ening nut to apply just enough tension ...

Страница 7: ...ion inserting it into slot at top of clomp lifting safety device as shown in Fig 6 Align pin in safety device with second hole from outer end of extension and insert connection pin Clomp lift should be set to obtain a 3 8 inch clear ance under clamp check on machine To adjust loosen cable lock nut and thread the lift cable into or out of plunger beneath the pressure cylinder If sufficient lift can...

Страница 8: ...achine pulleys After a few days service tension should be increosed to a point where one side of belt but not both can be pressed 1 2 inch out of a straight line between pulleys Too tight an adjustment wastes power and causes unnecessary wear on a belt To adjust loosen lock nut shown in illustration of belt tightener and adjusting nut below it to raise or lower belt tightener as required When corr...

Страница 9: ...can spout against boll push in and apply oil as needed WEEKLY LUBRICATION Open left front cover Using a small paint brush apply 30 to 40 oil sparingly on the following potts 1 Cam shaft drive chain 2 Cam shaft drive chain tightener sprocket 3 Gripper chain be sure to wipe off excess oil 4 Front and rear sprocket bearings for gripper chain depress gripper 6 inches manually to make front bearing acc...

Страница 10: ...achine is correctly lubricated and threaded Use 40 6 cord cotton thread in needle and 80 3 cord cotton thread on bobbin SPEED Sewing machine is designed to operate effi ciently at recommended maximum speed A new machine should be run at a speed 500 stitches per minute LESS than maximum for the first 100 operating hours DIAL STOP SETTING Sewing machine is usually fitted to sew 120 stitches for each...

Страница 11: ...ed for previous cycle and press AUTO START to begin sewing again WHEN PRE SET NUMBER OF BUTTONHOLES HAVE BEEN SEWN counter arrow reaches 0 on dial at top left corner of control panel shown in Fig 16 At this moment the RED PILOT LIGHT on panel lights up indicating BOBBIN EMPTY and machine stops AUTO START button is now inoperative TO RE START MACHINE WHEN RED LIGHT IS ON 1 Remove empty bobbin and r...

Страница 12: ...he six hex head gib screws Test the spacing on sample piece of material Make fine adjustment by loosening the two gib screws just tightened in step 4 and turning large adjusting screw at front end of slide by means of T wrench supplied Turn this screw clockwise for more space or counter clockwise for less space between button holes ONE COMPLETE TURN OF ADJUSTING SCREW EQUALS 1 64 INCH OF SPACE Tig...

Страница 13: ...ing action places an un necessary burden on driving mechanisms TO ADJUST OR CHECK AIR GAP ON STEARN S MAGNETIC CLUTCH 1 Rotate de energized clutch until one adjusting screw lines up with the adjusting hole provided in the sprocket wheel 2 Operate main power switch to on position and depress the drive start button This will mag netize the clutch Subsequently de energizing and energizing may be acco...

Страница 14: ... SWITCH FUSE PANEL Before attemptimg any trouble shooting or major adjustments of this device it is essential that one achieve a thorough understanding of the basic functions within the electrical circuits A POWER OFF STARTING FROM REST POSITION 1 When MAIN POWER switch is operated to ON position the green pilot light MAIN POWER START goes on showing that llOV trans former is energized From the li...

Страница 15: ...elements and open the llOV circuits The circuit can then only be restored by oper ating reset bar on the magnetic motor starter R 1 See schematics and glossary of symbols at back of manual c The magnetic clutch is also energized through left hand contacts of Relay R4 due to rectified current at terminals 19 and 20 NOTE Depressing the EMERGENCY STOP button will open the contactor and cut off power ...

Страница 16: ...From the library of Superior Sewing Machine Supply LLC ...

Страница 17: ...and Associated Controls as Machine is Tripped to Sew 3 MS 1 opens as soon as cam 1 releases it This de energizes solenoid releasing stop bar and freeing it to engage clutch and stop rotation at 1st stop position sewing posi tion C SEW FIRST BUTTONHOLE 1ST STOP POSI TION AND ADVANCE TO NEXT 1 Microswitch MS 5 is now operated by the second actuating cam on index cam shaft following along 120 behind ...

Страница 18: ...sm advancing external indicator one point toward zero When the indicator reaches zero red BOBBIN EMPTY indicator is on and the auto start switch will no longer initiate the cycle See later discussion 3 Simultaneously R3energizes solenoid through its right hand contacts The Milliard clutch is released starting a complete rotation of the index cam shaft back to the first position sew During rotation...

Страница 19: ...r of buttonholes are sewn the buttonhole counter coil returns block counter arrow to zero The circuit through the auto start switch is broken and RED EMPTY BOBBIN panel light is on The machine is now inoperative until operator replaces empty bobbin with a filled one and resets black counter arrow This extinguishes red panel light and throws control back to auto start button As a further aid in und...

Страница 20: ...or will develop a critical tem perature rise in heater coils of R1 thermal overload unit thus causing the opening of protective switches in the thermal unit The circuit may be restored in this case by pressing the reset bar on the thermal overload unit 4 Check outlet with voltage indicator In case proper voltage is available check power cord and plug for possible defects If voltage is not availabl...

Страница 21: ...itive contact and release 2 Check circuits to magnetic clutch If the left hand contacts on R4 are posi tive and clean check in turn screw connec tion little fuse rectifier and coil of mag netic clutch An ohmmeter or continuity checker may be used If the coil of the clutch is open it must be replaced TROUBLE CONDITION WORK CLAMP DOES NOT RISE Buttonhole completed and cut POSSIBLE CAUSES 1 Cycling m...

Страница 22: ...g mechanism To inspect cycling mechanism PRESS EMERGENCY STOP BUTTON cutting power on index unit Check action of switch actuating lever and arm When knife cuts actuating lever should move up caus ing lever arm to contact button on microswitch MS2 and close the circuit Guide pin should be in hole of arm If arm needs adjustment loosen socket screw in collar and move arm up or down as required Arm sh...

Страница 23: ... stop motion on sewing 6 256W 1 Machine only Lifting arm lock trip improperly set 7 256W 1 Machine only Belt shifter trip stud improperlyset CORRECTIONS Push EMERGENCY STOP button In all cases above consult appropriate instruction in the service manual for the sewing machine involved Trouble items 6 and 7 above apply to the 256W1 machine only For this type of machineuse a large screw driver in the...

Страница 24: ...equired and oiI 2 Clean sprockets and gripper track and oil as required 3 After cleaning and oiling as covered above move indexing unit manually and slowly open petcock until a position is found such that the index gripper returns smoothly TROUBLE CONDITION INDEXGRIPPER RETURNSTOO RAPIDLY POSSIBLE CAUSES 1 Oil seal between inside surface of cylinder and counterweight is broken 2 Petcock in bottom ...

Страница 25: ...ISASSEMBLE for mointenance Furthermore NEVER OIL mag netic clutch If clutch remains sluggish after cleaning when coil is energized check air gap for uniform spacing of 032 using a suitable brass gauge The clutch should act with a snap under normal operation See Page 13 If above conditioning foils to produce proper and consistent operation remove end replace with a new clutch 3 Clean track with sti...

Страница 26: ...e stop bar from engaging the clutch and stopping the shaft rotation MS2 THIS MICROSWITCH SHOULD REMAIN OPEN DURING THE SEWING OPERATION PLUNGER IN MS2 MAY FREEZE IN THE OPERATED POSITION DUE TO A MAL AOJUSTMENTOF ACTUATING ARM LEVER R3 SHOULD REMAIN DE ENERGIZED AT SEW OPERATION MSS HELD CLOSED BY CAM 2 DURING SEW OPERATION A IF MS2 CLOSES DURING SEWING OPERATION R3 OPERATES CLOSING THE RIGHT HAND...

Страница 27: ...own The circui d be continuous ch Check through left hand contacts of R2 en ergized with ohmmeter If circuit is no continuous or is insecure clean contact as previously described in this section Check the coil of the solenoid with ohmmete and repioce solenoid if coil is open Checl for accumulation of dirt and lint which migh hinder action of solenoid Clean as reaui red mm 1 From the library of Sup...

Страница 28: ...NOTES AND MEMORANDA 28 From the library of Superior Sewing Machine Supply LLC ...

Страница 29: ...MSS NOTE SI 4 BAR IN POSITION SOLENOID NOTES REGARDING LIMIT SWITCHES MSI 2 3 4 5 M4 JLLl MOTOR M MS 2 MOTEIt MAGNETIC CLUTCH 1 NORMALLY OPEN HELD CLOSED ATREST POSITION BYCAM 1 ONINDEXING CAM SHAFT 2 NORMALLY OPEN CLOSED BYKNIFE MECHANISM THROUGH CYCLING SWITCH LEVER 3 NORMALLY CLOSED HELDOPENBYCONTACT BLOCK ONGRIPPER CHAINSPROCKET 4 NORMALLY OPEN CLOSEDBYGRIPPER BLOCK AFTER COMPLETIONOF LAST BUT...

Страница 30: ... able arm CONDUCTOR Usually a copper wire or a coble of copper wires having the property of conducting electric current SYMBOL COIL DE ENERGIZED CONTACTS OPEN CONTACT CLOSED ImotorI FUNCTIONAL DESCRIPTION CONDUCTOR JUNCTION A point where two or more conductors ore joined together CONDUCTORS CROSSING A point on schematic where wires are shown crossed but not in junction Cose I and Case II are equiv...

Страница 31: ...POWER TRIPLE POLE SINGLE THROW Three separate conductors provided with a mechanical means for opening and closing three in dependent circuits SYMBOL RESET BAR BIMETAL 0 L switch HEAT COIL normally open O NORMALLY OPEN HELD CLOSED NORMALLY CLOSED NORMALLY CLOSED HELD OPEN FUNCTIONAL DESCRIPTION SWITCH THERMAL OVERLOAD A device employing a heating element coil in series with on electric circuit A bi...

Страница 32: ...20 CLUTCH EMERGENCY 9 STOP 1 GREEN LIGHT RED LIGHT IMPULSE COUNT SWITCH MAIN POWER START BOBBIN EMPTY SOLENOID WIRING DIAGRAM FOR 256 5 UNIT TERMINAL BOX terminal BLOCK FUSE TERMINAL BLOCK MOTOR 0 2 r Z P RELAYS 7 R3 0 THERMAL OVERLOAD UNIT relay I MAGNETIC MOTOR STARTER TRANSFORMER RESISTOR LITTLE FUSE D C CONDENSER 37 From the library of Superior Sewing Machine Supply LLC ...

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