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2591 2591 PREMIUM SERVICE MANUAL This service manual applies to machines from software version 0389/001 and serial number 2 766 760 onwards 296-12-19 129/002 Justieranleitung engl. 09.10...
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The reprinting, copying or translation of PFAFF Service Manuals, whether in whole or in part, is only permitted with our previous authorization and with written reference to the source. PFAFF Industriesysteme und Maschinen AG Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern...
Index Contents ................Page Adjustment ........................... 5 Notes on adjustment ......................5 Tools, gauges and other accessories for adjusting ............... 5 Abbreviations ......................... 5 Explanation of the symbols ....................5 Adjusting the basic machine ....................6 .05.01 Basic position of the balance wheel (adjustment aid) ............6 .05.02 Balance weight ........................
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Index Contents ................Page List of parameters for control P321 ..................33 Error Messages and Description..................38 Motor Errors......................... 39 Internet-Update der Maschinen-Software ................40 .10.01 Updating 2591 ME (with null modem cable) ..............40 .10.02 Updating 2591 PREMIUM (with SD card) ................41 Circuit diagrams .........................
Adjustment Adjustment Please observe all notes from Chapter 1 Safety of the instruction manual! In particular care must be taken to see that all protective devices are refi tted properly after adjustment, see Chapter 1.06 Danger warnings of the instruc- tion manual! If not otherwise stated, the machine must be disconnected from the electrical power supply.
Adjustment Adjusting the basic machine Basic position of the balance wheel .05.01 (adjustment aid) Requirement When the needle bar is positioned at t.d.c., the marking "0" on the scale should be level with the top edge of the belt guard (see arrow). 127-01 Fig.
Adjustment Balance weight .05.02 Requirement When the needle bar is positioned at b.d.c. (balance wheel position 180°) the largest ec- centricity of the balance weight 1 should be at the top. Fig. 1 - 02 ● Adjust balance weight 1 (screw 2) in accordance with the requirement.
Adjustment Needle position in the direction of sewing .05.03 Requirement With the stitch length set at "5", in its front and rear point of reversal the needle should be the same distance from the inside edges of the needle hole. Fig.
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Adjustment ● Move the needle bar frame 5 according to the requirement and tighten screw 1. ● Check according to the requirement. ● Screws 2 remain loosened for the subsequent adjustment.
Adjustment Limiting the needle bar frame .05.04 Requirement With the stitch length set at "5", when the needle is in its front and rear point of reversal screw 3 should be the same distance from the inside edge of its hole.. Fig.
Adjustment Preliminary adjustment of the needle height .05.05 Requirement When the needle bar is positioned at t.d.c. (handwheel position 0°) there should be a gap between upper edge needle bar and upper edge needle pendulum of about 54 mm. Fig. 1 - 05 ●...
Adjustment Needle rise, Gripper distance, Needle height and Needle guard .05.06 Requirement With the needle bar positioned 2.0 mm after BDC (balance wheel position 202°) and the stitch length set at "0.8" the hook point must be at needle centre with a hook-to-needle clearance of 0.05 to 0.1 mm;...
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Adjustment ● Tighten screws 2 allowing for bevel gear wheel movement. ● Move collar 7 up against bevel gear wheel 8 and tighten screws 1. ● Screws 5 remain loosened for further adjustments. ● Adjust needle guard 6 (screw 9) according to requirement 3. When changing a clamp take care that the markings 10 and 11 are on one side.
Adjustment Needle position crosswise to sewing direction .05.07 Requirement As seen crosswise to the sewing direction, the needle must penetrate in the centre of the needle hole. Fig. 1 - 07 ● Adjust feed wheel post 1 (screws 2, 3 and 4) according to the requirement.
Adjustment Height and stroke of the bobbin case opener .05.08 Requirement The top edges of the bobbin case opener 1 and bobbin case base 3 should be on one level. When the bobbin case opener 1 has defl ected the bobbin case to its furthest point, the catch of the bobbin case should be 0.3 - 0.5 mm from the back edge of the needle plate recess.
Adjustment Height of the feed wheel .05.09 Requirement The feed wheel should protrude from the needle plate by tooth height (approx. 0.8 mm) Fig. 1 - 09 ● Swing out the roller presser. ● Loosen screws ● Adjust eccentric 3 (fastening screw accessible through hole 2) according to the requirement.
Adjustment Roller-presser .05.10 Requirement When the roller-presser 1 is resting on the feed wheel 6 it must be parallel to the feed wheel 6 when viewed in the direction of sewing, be in the middle of the (needle when viewed in the direction of sewing and be as close as possible to the needle when viewed in transverse direction of sewing.
Adjustment Clearance between roller presser and feed wheel .05.11 Requirement With a resting roller-presser there should be a gap between the lift piece 1 and the housing of about 3mm. With a raised roller-presser the distance between roller-presser and feed wheel should be 8mm.
Adjustment Knee lever .05.12 Requirement When the knee lever is pressed the roller-presser should raise up Before the roller-presser raises up, the knee lever should have a little bit of clearance. Fig. 1 - 12 ● Turn screw 1 (nut 2) according to requirement 1 . ●...
Adjustment Tension release .05.13 Requirement With the roller-presser raised the tension shims 3 should be about 0.5mm loosened from each other. 0,5 mm Fig. 1 - 13 ● Raise roller-presser and calibrate lever 1 (screw 2) according to the requirement.
Adjustment Thread check spring and thread regulator .05.14 Requirement The movement of thread regulator 3 must be completed when the needle point enters the material. When the thread loop is at its largest while being passed around the hook, the check thread spring 3 should rise slightly from the rest 1.
Adjustment Bobbin winder .05.15 Requirement When the bobbin winder is engaged, the winding spindle must be driven reliably. When it is disengaged, friction wheel 3 should not be touching drive wheel 1. When it is switched off, the bobbin winder must click securely into its end position (knife raised).
Adjustment Sewing foot pressure .05.16 Requirement The material must be fed smoothly. No pressure marks should be visible on the material. Fig. 1 - 16 ● Turn adjustment screw 1 in accordance with the requirement.
Adjustment Lubrication .05.18 Requirement After a running time of 10 seconds a fi ne line of oil should form on a strip of paper held next to the hook. Fig. 1 - 18 ● Check whether oil has been fi lled in and that there is no air in the oil lines. ●...
Adjustment Re-engaging the slip-clutch .05.19 Clutch 1 is adjusted at the works. In the case of a thread jamming, clutch 1 will disengage, in order to avoid damage to the hooks. The following describes how to re-engage clutch 1. Fig. 1 - 19 ●...
Adjustment Adjusting the thread trimmer -900/81 Resting position of the roller lever / radial position of the control cam .06.01 Requirement When the thread trimmer attachment is at rest lever 7 should fi t closely to plunger 5 and the roller on roller lever 4 should be 0.3mm away from control cam 1. When thread lever at t.d.c.
Adjustment Position of the thread catcher holder .06.02 Requirement There should be a minimum amount of play between toothed wheel 3 and toothed segment 4. . Both in the neutral position and the foremost position of the catcher, the distance between the toothed segment 4 and the outer edge of the thread catcher holder 1 should be the same (see arrow).
Adjustment Distance between thread catcher and needle plate .06.03 Requirement During its swivel movement thread catcher 1 should not pass the edge of the needle plate (see arrow in magnifi cation). Fig. 1 - 22 ● Move thread catcher 1 (screws 2, two screws) parallel to the thread catcher holder in accordance with the requirement.
Adjustment Position of the thread catcher .06.04 Requirement The bottom edge of the thread catcher 1 should be at a distance of 0.1 mm from the positioning fi nger of the bobbin case 5. When the thread trimmer is in its neutral position, the rear edge of thread catcher should be positioned approx.
Adjustment Knife position and knife pressure .06.05 Requirement The knife 1 should be touching the needle plate. The knife pressure should be set as low as possible but the cutting operation should still be carried out reliably. Fig. 1 - 24 ●...
Adjustment Bobbin thread retaining spring .06.06 Requirement The bobbin thread clamp spring should be guided reliably in the thread groove of the thread catcher 3. 2. The tension of the bobbin thread spring clamp should be as low as possible, but the bobbin thread should be held reliably after the cutting operation.
Adjustment Manual cutting test .06.07 Requirement When thread catcher 1 is on its forward stroke, it must not carry bobbin thread 3 for- ward too. When thread catcher 1 is in its front position, bobbin thread 3 must be held reliably by hook 4.
Adjustment List of parameters for control P321 The operator has free access to the "100" parameters. Parameters "200" - "800" can only be changed after entering a code number and many only be changed by authorised personnel. Pedal controlled start backtack I - II (I = OFF , II = ON) Reverse rotation (I = OFF , II = ON)
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Adjustment Roller-presser fi eld discharge (OFF = I, ON = II) I - II I = roller-presser is lowered slowly. Should be set for high foot pressure II = roller-presser is lowered quickly. Should be set for low foot pressure Single stitch button assignment 1 - 3 1 = Single stitch, 2 = Needle up,...
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Adjustment Maximum speed 100 - 3500 3500 Start backtack speed 100 - 1500 End backtack speed 100 - 1500 Soft start speed 100 - 3500 1500 Soft start stitch 0 - 15 Move roller-presser and feed wheel step motor Inputs: 0123456789ABCDEF (2591 PREMIUM only), 0 = Needle mid point (E16) 1 = Needle mid point (E15)
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Adjustment P-section speed regulator 1 - 50 I-section speed regulator 0 - 100 P-section position regulator 1 - 50 D-section position regulator 1 - 100 Time for position regulator 0 - 100 P-section position regulator for remainder 1 - 50 brake D-section position regulator for remainder 1 - 50...
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Adjustment Function group 300 access authorisation 0 - 1 (Sewing motor positions) Function group 400 access authorisation 0 - 1 (Times) Function group 500 access authorisation 0 - 1 (Counter and revolution speed) Function group 600 access authorisation 0 - 1 (Service) Function group 700 access authorisation 0 - 1...
Adjustment Error Messages and Description Error Description System error Sewing motor E002/BB/xxx BB = 20: Deadman 02: Position forwards 03: Position in reverse 05: Position by shortest route 09: Write parameter 10: Speed 0A: Reset stitch counter 0B: Stop after xxx stitches 30: Timeout for increasing speed 31: Timeout from uncertain positioning 32: Timeout from deadman command...
Adjustment Motor Errors Error Description Invalid parameter value Communication error Init not ready Command overrun Mains off during initialisation Excess current directly after mains on Short circuit Excess current during operation Motor blocked No incremental plug Incremental transducer missing for transmission/reduction Motor blocked in 1st stitch Interior starting error Dead man monitoring...
Adjustment Internet-Update der Maschinen-Software The machine software can be updated with PFAFF fl ash programming. For this purpose the PFP boot program (from version 3.25 on) and the appropriate control software for the machine type must be installed on a PC. The transfer of the data to the machine can be carried out with a null modem cable (part no.
Adjustment The software update is carried out, the update progress is shown on the bar display of the PFP boot program. ● During the up-dating procedure the machine must not be switched off. ● When the update has been completed, switch off the machine and end the PFP boot pro- gram.
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A plausibility control is carried out and, if necessary, a cold start. ● To update the step motor software please contact your PFAFF representa- Fig. 1 - 27 tive. More information and assistance is at your disposal in the fi le "PFPHILFE.TXT", which can be called up from the PFP boot program by pressing the "help"...
Circuit diagrams Circuit diagrams Reference list for circuit diagrams 91-191 544-95 PFAFF P 321ED Control Device PICOTOP or BDF S3 Control Panel OTE (Sewing Head Auto Select) DX355 Needle pendulum Sewing lamp Sewing motor Feed wheel step motor Roller-presser step motor...