Pfaff 294 User manual

296-12-18 170
Betriebsanleitung engl. 03.99
294
1293
Instruction Manual
1294

Thereprinting,copyingortranslationofPFAFFInstruction
Manuals, whether in whole or in part, is only permitted with our
previousauthorisationandwithwrittenreferencetothesource.
G.M. PFAFF
Aktiengesellschaft
Postfach 3020
D-67653 Kaiserslautern
Königstr. 154
D-67655 Kaiserslautern
Editing / Illustrations
HAAS-Publikationen GmbH
D-53840 Troisdorf
This Instruction Manual is valid for all models and subclasses
listed in the chapter "Specifications".

Contents
Contents ...............................................................................Chapter - Page
1Safety......................................................................................................................... 1 - 1
1.01 Directives ................................................................................................................... 1 - 1
1.02 Generalnotesonsafety.............................................................................................. 1 - 1
1.03 Safety symbols .......................................................................................................... 1 - 2
1.04 Importantnotesfortheuser ....................................................................................... 1 - 2
1.05 Operatingand technicalstaff ...................................................................................... 1 - 3
1.05.01 Operatingstaff............................................................................................................ 1 - 3
1.05.02 Technicalstaff ............................................................................................................ 1 - 3
1.06 Dangerwarnings ........................................................................................................ 1 - 4
2Properuse................................................................................................................. 2 - 1
3Specifications ........................................................................................................... 3 - 1
3.01 PFAFF1293 ................................................................................................................ 3 - 1
3.02 PFAFF294 / PFAFF 1294 ............................................................................................ 3 - 2
3.03 Models and subclasses.............................................................................................. 3 - 3
4Machine disposal ..................................................................................................... 4 - 1
5Transportation,packing andstorage ...................................................................... 5 - 1
5.01 Transportationtocustomer’spremises ...................................................................... 5 - 1
5.02 Transportationinsidecustomer’spremises ................................................................ 5 - 1
5.03 Disposal of packing materials..................................................................................... 5 - 1
5.04 Storage ....................................................................................................................... 5 - 1
6Explanationof symbols............................................................................................ 6 - 1
7Controls..................................................................................................................... 7 - 1
7.01 On/offswitch.............................................................................................................. 7 -1
7.02 Pedal (on machines without automatic backtacking mechanism
andpresserfootlift-911/97) ....................................................................................... 7 - 1
7.03 Pedal (on machines with automatic backtacking mechanism
andpresserfootlift-911/97) ....................................................................................... 7 - 2
7.04 Pedale( beiMaschinen mitPresserfußlüftung -910/01) ............................................. 7 - 2
7.05 Knee lever (on machines without automatic backtacking mechanism
andpresserfootlift-911/97) ....................................................................................... 7 - 3
7.06 Key on the machine head (on machines with automatic backtacking
mechanism and presser foot lift -911/97) ................................................................... 7 - 3
7.07 Leverforliftingtherollerpresser................................................................................. 7 - 4
7.08 Feedregulatorandreversesewinglever..................................................................... 7 - 4
7.09 Feed regulator (on machines with automatic backtacking mechanism
andpresserfootlift-911/97) ....................................................................................... 7 - 5
8Installation and commissioning .............................................................................. 8 - 1
8.01 Installation.................................................................................................................. 8 - 1

Contents
Contents ...............................................................................Chapter - Page
8.01.01 Adjusting the table-top height ................................................................................... 8 - 1
8.01.02 Adjusting the V-belt tension ...................................................................................... 8 - 2
8.01.03 Fitting the upper V-belt guard .................................................................................... 8 - 2
8.01.04 Fitting the lower V-belt guard .................................................................................... 8 - 3
8.01.05 Fitting the synchonizer .............................................................................................. 8 - 3
8.01.06 Fitting the reel stand ................................................................................................. 8 - 4
8.02 Commissioning.......................................................................................................... 8 - 4
8.03 Switching the machine on / off ................................................................................. 8 - 4
9Settingup.................................................................................................................. 9 - 1
9.01 InsertingtheneedleinthePFAFF1293....................................................................... 9 - 1
9.02 Insertingtheneedlein thePFAFF 294andPFAFF1294 .............................................. 9 - 2
9.03 Windingthebobbinthread,adjustingthethreadtension ............................................. 9 - 3
9.04 Removing /insertingthe bobbincase .......................................................................... 9 - 4
9.05 Threading thebobbin case/ adjustingthe threadtension ............................................ 9 - 4
9.06 Threadingtheneedlethread/adjustingtheneedlethreadtension(PFAFF1293)......... 9 - 5
9.07 Threadingtheneedlethread/adjustingtheneedlethreadtension
(PFAFF294 and PFAFF1294) ..................................................................................... 9 - 6
10 Careandmaintenance............................................................................................ 10 - 1
10.01 Servicingandmaintenanceintervals .................................................................... 10 - 1
10.02 Cleaningthe hook compartmentandthe hook.......................................................... 10 - 1
10.03 Generallubrication .................................................................................................... 10 - 2
10.04 Lubricatingthehook ................................................................................................. 10 - 3
10.05 Lubricatingthefrontparts ......................................................................................... 10 - 3
10.06 Checking / adjusting the air pressure ........................................................................ 10 - 4
10.07 Emptying/ cleaningthewater containerof theairfilter/regulator .............................. 10 - 4
11 Adjustment.............................................................................................................. 11 - 1
11.01 Notes of adjusting .................................................................................................. 11 - 1
11.02 Tools, gauges and other accessories........................................................................ 11 - 1
11.03 Abbreviations............................................................................................................ 11 - 1
11.04 Adjusting the basic machine..................................................................................... 11 - 2
11.04.01 Positioningthefeeddog ........................................................................................... 11 - 2
11.04.02 Heightofthefeeddog .............................................................................................. 11 - 3
11.04.03 Pre-adjustingtheneedleheight ................................................................................. 11 - 4
11.04.04 Centeringtheneedleintheneedlehole .................................................................... 11 - 5
11.04.05 Drivingmotionofthefeeddog .................................................................................. 11 - 6
11.04.06 Liftingmotionofthefeeddog ................................................................................... 11 - 7
11.04.07 Basic position of the roller presser drive (only on machines with subcl. -4/01)..... 11 - 8
11.04.08 Synchronizing the roller presser and feed dog
(only on machines with subcl. -4/01) ...................................................................... 11 - 9
11.04.09 Releasing the roller presser for reverse sewing
(only on machines with subcl. -4/01) ...................................................................... 11 - 10
11.04.10 Hook-to-needle clearance, needle rise, needle height and needle guard ................ 11 - 11

Contents
Contents ...............................................................................Chapter - Page
11.04.11 Bobbin-case opener ................................................................................................. 11 - 13
11.04.12 Safety coupling........................................................................................................ 11 -14
11.04.13 Clearance between roller presser and needle plate................................................ 11 - 15
11.04.14 Pressure of roller presser........................................................................................ 11 - 16
11.04.15 Needle thread tension release ................................................................................ 11 - 17
11.04.16 Thread check spring (PFAFF 1293 and on machines without -900/56) ................... 11 - 18
11.04.17 Thread check spring (on PFAFF 294 and PFAFF 1294 with - 900/56)...................... 11 - 19
11.04.18 Bobbin winder.......................................................................................................... 11 -20
11.04.19 Adjusting the presser bar lifting lever with subclass -911/97 ................................ 11 - 21
11.04.20 Adjusting the presser bar lifting lever without subclass -911/97 ........................... 11 - 22
11.05 Adjustingthethreadtrimmer-900/56........................................................................ 11 - 23
11.05.01 Engagingsolenoid..................................................................................................... 11 - 23
11.05.02 Control cam (preliminary adjustment) ....................................................................... 11 - 24
11.05.03 Trippingleverspringaction ....................................................................................... 11 - 25
11.05.04 Trippingleverstroke ................................................................................................. 11 - 26
11.05.05 Threadcatcherdrive linkage ..................................................................................... 11 - 27
11.05.06 Linkage rod (only for PFAFF 294 and PFAFF 1294) .................................................. 11 - 28
11.05.07 Thread-catcherheight ............................................................................................... 11 - 29
11.05.08 Threadcatcherrestingposition ................................................................................. 11 - 30
11.05.09 Knifepressure .......................................................................................................... 11 - 31
11.05.10 Bobbin-threadtrappingspring ................................................................................... 11 - 32
11.05.11 Control cam (final adjustment).................................................................................. 11 - 33
11.05.12 Releaselever............................................................................................................ 11 - 34
11.05.13 Releaserod .............................................................................................................. 11 - 35
11.05.14 Adjustingthesynchronizer........................................................................................ 11 - 36

Safety
1 - 1
1 Safety
1.01 Regulations
This machine is constructed in accordance with the European regulations indicated in the
conformityandmanufacturer'sdeclarations.
In addition to this instruction manual, please also observe all generally accepted, statutory
andotherlegalrequirements, including those of the user's country, andtheapplicable
pollutioncontrolregulations!
The valid regulations of the regional social insurance society for occupational accidents or
othersupervisory authoritiesare tobe strictlyadheredto!
1.02 General notes on safety
●The machine must only be operated by adequately trained operators and only when the
instructionmanualhas been fullyreadandunderstood!
●All notices on safety and the instruction manual of the motor manufacturer are to be read
beforethemachineisputintooperation!
●All notes on the machine concerning danger and safety must be observed!
●The machine must be used for the purpose for which it is intended and must not be
operated without its safety devices; all regulations relevant to safety must be adhered to.
●Whenpartsetsarechanged (e.g. needle, presser foot, needle plate, feed dog or bobbin),
duringthreading,whentheworkplace isleftunattendedandduringmaintenancework, the
machine must be isolated from the power supply by turning off the on/off switch or
removingtheplugfrom the mains!
●Daily maintenance work must only be carried out by appropriately trained persons!
●Repairs and special maintenance work must only be carried out by qualified technical staff
orpersonswithappropriatetraining!
●During maintenance or repairs on the pneumatic system the machine must be isolated
from the compressed air supply! The only exception to this is when adjustments or
function checks are carried out by appropriately trained technical staff!
●Work on the electrical equipment must only be carried out by technical staff who are
qualifiedtodo so!
●Workonpartsorequipment connected to the power supply is not permitted! The only
exceptionstothisarespecified in regulations EN 50110.
●Conversionormodification of the machine must only be carried out under observation of
allrelevantsafetyregulations!

Safety
1 - 2
●Only spare parts which have been approved by us are to be used for repairs! We draw
special attention to the fact that spare parts and accessories not supplied by us have not
been subjected to testing nor approval by us. Fitting and/or use of any such parts may
cause negative changes to the design characteristics of the machine. We shall not ac-cept
any liability for damage caused by the use of non-original parts.
1.03 Safety symbols
Danger!
Special points to observe.
Dangerof injurytooperating ortechnicalstaff!
1.04 Important notes for the user
●This instruction manual belongs to the equipment of the machine and must be available to
the operating staff at all times.
●This instruction manual must be read before the machine is operated for the first time.
●Both operating and technical staff must be instructed on the safety devices of the machine
and on safe working methods.
●It is the duty of the user to operate the machine in perfect running order only.
●The user must ensure that none of the safety devices are removed nor put out of working
order.
●The user must ensure that only authorized persons operate and work on the machine.
ForfurtherinformationpleaserefertoyourPFAFFagency.

Safety
1 - 3
1.05 Notes for operating and technical staff
1.05.01 Operatingstaff
Operatingstaff arethepersons responsibleforsetting up,operatingand cleaningthemach-ine
and for removing any disturbances in the sewing area.
Theoperatingstaff are obligedtoobservethe following points,andmust:
●always observe the notes on safety in this instruction manual!
●avoid using any working methods which adversely effect the safety of the machine!
●avoid wearing loose-fitting clothing or jewelry such as necklaces or rings!
●also ensure that only authorized persons are allowed near the danger area of the machine!
●immediately report to the user any changes to the machine that may affect its safety!
1.05.02 Technical staff
Technicalstaffare persons who have been trained in electrical engineering, electronics,
pneumaticsandmechanicalengineering.Theyareresponsibleforlubricating, servicing,
repairingand adjusting themachine.
The technical staff are obliged to observe the following points, and must:
●always observe the notes on safety in this instruction manual!
●switch off the on/off switch before carrying out adjustment and repair work and ensure it
cannotbe switchedonagain unintentionally!
●neverworkon parts or equipment still connected to the power supply! Exceptions to this
areonlypermissibleaccording to regulations EN 50110;
●replace all safety covers after carrying out maintenance or repair work!

Safety
1 - 4
1.06 Danger warnings
A working area of 1 metre is to be kept free both in front of and behind the
machine while it is in operation, so that it is always easily accessible.
Never reach into the sewing area while sewing!
Dangerofinjurybytheneedle!
Never leave objects on the table while adjusting the machine settings!
Objectscan become trappedorbe hurled out!Dangerof injury!
On mechanically activated clutch motors without an actuating lock, wait until
the motor has come to a standstill! Danger of injury!
Do notoperate themachine without thetake-up leverguard 1!
Danger of injury due to the movement of the take-up lever !
Do notoperate the machine withoutbelt guards 2 and 3!
Dangerof injuryby theturning drivebelt!
Donotoperatetwo-needlemachineswithoutthefingerguard4!
Dangerof injury bythemoving needle!
Donot operatethemachine withoutsupport5!Danger dueto thetopheavy
sewing head! Machine can fall over backwards when being tilted!
Fig. 1 - 01
3
12
5
4

Proper use
2 - 1
2 Proper use
The PFAFF 294 is a two-needle lockstitch post-bed sewing machine with roller presser,
bottomfeeddogandverticalsewinghook.
The PFAFF 1293 is a single-needle lockstitch post-bed sewing machine with roller presser,
bottom feed dog and large vertical sewing hook.
The PFAFF 1294 is a two-needle lockstitch post-bed sewing machine with roller presser,
bottom feed dog and large vertical sewing hook.
The machines are used for producing lockstitch seams in the textile and leather industries.
Any use of these machines which is not approved by the manufacturer shall be
considered as improper use! The manufacturer shall not be liable for any
damage arising out of improper use! Proper use shall also be considered to
include compliance with the operation, adjustment, service and repair measures
specifiedbythemanufacturer!