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Pfaff 591 - page 1
AD JUSTMEN T MANUAL 296-1 2-1 9 1 96/002 Justieranleit ung engl. 0 7 .12 571 57 4 591 This Adjustment Manual is valid f or mac hines from the follo wing serial numbers onwards: # 6 50 0 120 ...
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Pfaff 591 - page 2
The reprinting, copying or translation of PF AFF Ser vice Manuals, whether in whole or in part, is only permit ted with our previous authorization and with writ ten ref erence to the source. PF AFF Industriesysteme und Masc hinen AG Hans-Geiger -Str . 1 2 - IG Nord D-67 661 Kaiserslautern ...
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Pfaff 591 - page 3
Index Contents ................................................................................ P age 3 1 Adjustment ................................................................................................................... ........ 5 1 .0 1 T ools, gauges and other accessories .............................................................. ...
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Pfaff 591 - page 4
Index Contents ................................................................................ P age 4 1 .05.04 Knif e stroke (on models 57 4 and 591) .................................................................................. 43 1 .05.05 Cut ting stroke (on model 571)......................................................................... ...
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Pfaff 591 - page 5
Adjustment 5 1 Adjustment Please obser ve all notes from Chapter 1 S afety of the instruction manual! In particular care must be taken to see that all protective de vices are refi t ted properly af ter adjustment, see Chapter 1 . 06 Danger warnings of the instr uc- tion manual! If not other wise st ated, the mac hine must be disconnected from the ...
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Pfaff 591 - page 6
Adjustment 6 1 .02 Abbreviations TDC = top dead center BDC = bot tom dead center 1 .03 Explanation of the symbols In this adjustment manual, symbols emphasize operations to be car ried out or important in- formation. The symbols used hav e the f ollowing meaning: Note, information Ser vice, repair , adjustment, maintenance (work to be car ried out ...
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Pfaff 591 - page 7
Adjustment 7 -021 Fig. 1 - 0 1 1 .04 Adjusting the basic mac hine 1 .04.0 1 Needle position in se wing direction (on the PF AFF 571 and 591) ● Set the minimum stitc h length. ● Adjust needle bar (scre w 1 ) according to the requirement . Requirement With the stitc h length set at its minimum, the needle should be positioned in the centre of the ...
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Pfaff 591 - page 8
Adjustment 8 1 .04.02 Needle position in sewing direction (on the PF AFF 57 4) Requirement The needle should be positioned in the centre of the needle hole as seen in the direction of sewing. ● Adjust needle bar (scre ws 1 and 2 ) according to the requirement . 61-078 Fig. 1 - 02 61-077 1 2 ...
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Pfaff 591 - page 9
Adjustment 9 1 .04.03 Preliminary adjustment of the needle height Requirement When the needle bar is at TDC, there must be a clearance of approx. 21 mm between the needle point and the needle plate. ● Adjust needle bar 1 (scre w 2 ), without turning it, according to the requirement . 90-036 Fig. 1 - 03 2 1 21 mm ...
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Pfaff 591 - page 10
Adjustment 10 1 .04.04 Needle rise, hook clearance, needle height and needle guard (on the PF AFF 571) Requirement With the needle bar positioned 2 , 4 mm af ter BDC and the stitc h length set at " 0 . 8 " 1 . the hook point must be at needle centre with a hook-to-needle clearance of 0 . 05 to 0 . 1 mm ; 2. the top of the needle ey e must ...
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Pfaff 591 - page 11
Adjustment 11 ● Set hook point at needle centre, making sure that the needle is not defl ected by needle guard 6 . ● Adjust needle height according to R equirement 2 . ● Adjust hook post according to R equirement 1 and tighten screws 4 and 5 . ● Making sure that there is some play in the be vel gear , tighten scre ws 1 . ● With ret ainin ...
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Pfaff 591 - page 12
Adjustment 12 1 .04.05 Needle rise, hook clearance, needle height and needle guard (on the PF AFF 57 4) Requirement With the needle bar positioned 2 , 4 mm af ter BDC 1 . the hook point must be at needle centre with a hook-to-needle clearance of 0 . 05 to 0 . 1 mm ; 2. the top of the needle ey e must be 0 . 8 to 1 . 0 mm below the hook point; 3. th ...
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Pfaff 591 - page 13
Adjustment 13 15 16 ● Set both hook points at needle centre, making sure that the needles are not defl ected by needle guard 9 . ● Adjust needle height according to R equirement 2 . ● Adjust both hook posts according to R equirement 1 and tighten screws 8 . ● Tighten screws 1 and 6 . ● Making sure that there is some play in the be vel ge ...
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Pfaff 591 - page 14
Adjustment 14 1 .04.06 Needle rise, hook clearance, needle height and needle guard (on the PF AFF 591) Requirement With the needle bar positioned 2 , 4 mm af ter BDC 1 . the hook point must be at needle centre with a hook-to-needle clearance of 0 . 05 to 0 . 1 mm ; 2. the top of the needle ey e must be 0 . 8 to 1 . 0 mm below the hook point; 3. the ...
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Pfaff 591 - page 15
Adjustment 15 10 11 ● Set hook point at needle centre, making sure that the needle is not defl ected by needle guard 6 . ● Adjust needle height according to R equirement 2 . ● Adjust hook post according to R equirement 1 and tighten screws 4 . ● Making sure that there is some play in the be vel gear , tighten scre ws 2 . ● With ret ainin ...
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Pfaff 591 - page 16
Adjustment 16 1 .04.07 Needle position crosswise to sewing direction (on the PF AFF 571) Requirement When the stitc h length is set at its maximum, the needle must be positioned in the cen- tre of the needle hole when entering and coming out of the needle plate. ● T urn screws 1 (scre ws 2 , on both sides of the post) according to the requirement ...
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Pfaff 591 - page 17
Adjustment 17 1 .04.08 Needle position crosswise to sewing direction (on the PF AFF 57 4) ● Shif t bearing plate 1 (screws 2 , on both sides of the post) according to the requirement . Requirement As seen crosswise to the se wing direction, the needles must penetrate in the centre of their needle holes. Fig. 1 - 08 1 2 2 2 2 ...
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Pfaff 591 - page 18
Adjustment 18 1 .04.09 Needle position crosswise to sewing direction (on the PF AFF 591) Requirement As seen crosswise to the se wing direction, the needle must penetrate in the centre of the needle hole. ● Adjust f eed wheel post 1 (screws 2 , 3 and 4 ) according to the requirement . 90-035 Fig. 1 - 09 3 1 2 4 4 4 2 ...
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Pfaff 591 - page 19
Adjustment 19 1 .04.1 0 Height and strok e of the bobbin case opener Requirement 1 . The top edges of the bobbin case opener 1 and bobbin case base 3 should be on one lev el. 2. When the bobbin case opener 1 has defl ected the bobbin case to its furthest point, the catc h of the bobbin case should be 0 . 3 – 0 . 5 mm from the bac k edge of the n ...
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Pfaff 591 - page 20
Adjustment 20 1 .04.1 1 Height of the f eed wheel (on the PF AFF 571) Requirement 1 . When pressure is applied to the f eed wheel 4 , it should protrude from the needle plate by tooth height (appro x. 0 . 8 mm ) 2. When no pressure is applied to the f eed wheel 4 , it should hav e a vertical play of ap- prox. 0 . 3 mm . ● S wing out the roller pr ...
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Pfaff 591 - page 21
Adjustment 21 1 .04.1 2 Height of the f eed wheel (on the PF AFF 57 4) Requirement 1 . When pressure is applied to the f eed wheel 4 , it should protrude from the needle plate by tooth height (appro x. 0 . 8 mm ) 2. When no pressure is applied to the f eed wheel 4 , it should hav e a vertical play of ap- prox. 0 . 3 mm . ● Swing out the roller pr ...
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Pfaff 591 - page 22
Adjustment 22 1 .04.1 3 Height of the f eed wheel (on the PF AFF 591) Requirement The f eed wheel should protrude from the needle plate b y tooth height (approx. 0 . 8 mm ) ● S wing out the roller presser . ● Loosen scre ws 1 . ● Adjust eccentric 3 (f astening screw accessible through hole 2 ) according to the require- ment . ● Tighten scre ...
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Pfaff 591 - page 23
Adjustment 23 1 .04.1 4 Stitc h length control eccentric Requirement When the needle (with maximum stitc h length set), coming from TDC, is 3 mm abov e the needle plate, the crank 3 must hav e reac hed its front point of rev ersal. ● Set the maximum stitc h length. ● lT urn stitc h length control device 1 (scre ws 2 ) according to the requireme ...
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Pfaff 591 - page 24
Adjustment 24 1 .04.1 5 Stitc h length scale disk Requirement When the stitc h length control device is engaged and the stitc h length is set at “ 0 ” , the marking line on scale disk 1 should be positioned opposite the low er edge 3 of the guard belt opening. ● Set stitc h length " 0 ". ● T urn stitc h length control device 1 (sc ...
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Pfaff 591 - page 25
Adjustment 25 1 .04.1 6 Shaf t crank to f eed wheel driv e ● Set the maximum stitc h length. ● T wist or shif t the shaf t crank 1 (screw 2 ) according to the requirement . Requirement When the maximum stitc h length is set, the linkage rod 3 , or linkage rods 3 and 4 on the models 571 and 591 , must be able to mov e freely when the balance whe ...
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Pfaff 591 - page 26
Adjustment 26 ● Set the maximum stitc h length. ● T wist clamp crank 1 (screw 2 ) according to the requirement . 1 .04.1 7 Shaf t crank to roller presser driv e Requirement When the maximum stitc h length is set, the linkage rods 3 and 4 must be able to mov e freely at their lef t and right point of rev ersal when the balance wheel is turned. F ...
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Pfaff 591 - page 27
Adjustment 27 ● Raise the presser bar lif ter . ● Adjust the presser bar 1 (scre ws 2 ) according to the requirement . Make sure that the roller presser is parallel to the f eed wheel. 1 .04.1 8 Clearance between roller presser and f eed wheel Requirement When the presser bar lif ter is raised, the clearance bet w een the roller presser and the ...
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Pfaff 591 - page 28
Adjustment 28 1 .04.1 9 R oller presser ● Raise the roller presser . ● Al ways obser ve requirement 1 f or subsequent adjustments. ● Adjust roller presser 1 (scre w 2 ) according to requirement 2 . ● Lo wer roller presser 1 to rest on f eed wheel 5 . ● Adjust roller presser brac k et 3 (screw 4 ) according to requirement 3 . When sewing v ...
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Pfaff 591 - page 29
Adjustment 29 1 .04.20 Stitc h length on stitc h length scale ● Set stitc h length " 3 ". ● By t urning the balance wheel, let the needle enter 11 times and measure the total length. ● Adjust clamp 1 (scre w 2 ) according to the requirement . Clamp 1 must not be positioned diagonally to the roc k shaf t! Requirement When the stitc h ...
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Pfaff 591 - page 30
Adjustment 30 1 .04.21 S ync hronization of roller presser and f eed wheel ● Set stitc h length " 3 ". ● By t urning the balance wheel, let the needle enter 30 times. ● Compare the total sewn length of the low er and upper leather layer . ● Adjust clamp 1 (scre w 2 ) according to the requirement . Clamp 1 must not be positioned di ...
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Pfaff 591 - page 31
Adjustment 31 1 .04.22 Retainer (only on model 57 4) ● Adjust retainer 1 (screw 2 ) according to requirement 3 . ● Adjust brac k et 3 (screw 4 ) according to requirement 1 and 2 . Requirement The retainer 1 must 1 . be as close as possible to the needle, as seen in the direction of sewing and 2. be in the centre of the needle, as seen crosswise ...
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Pfaff 591 - page 32
Adjustment 32 1 .04.23 Knee lev er Requirement 1 . Bef ore the roller presser rises, the knee lever must still ha ve a slight play . 2. When the knee lev er is raised as far as possible, the le ver for the roller presser must drop automatically . 3. Knee lev er bar 5 must be at an angle of approx. 75 ° to the bedplate. ● Adjust scre w 1 (nut 2 ) ...
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Pfaff 591 - page 33
Adjustment 33 1 .04.24 Needle thread tension release Requirement 1 . When the presser bar lif ter is raised, the tension discs 3 should be pressed at least 0 . 5 mm apart. 2. When the roller presser is low ered, the tension must be fully ef fectiv e. ● Align tension mounting plate 1 and pressure plate 2 according to the requirement . Fig. 1 - 24 ...
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Pfaff 591 - page 34
Adjustment 34 1 .04.25 Thread c hec k spring (PF AFF 571 and 591) Requirement 1 . The mo vement of thread c hec k spring 7 should be completed when the needle point penetrates the fabric (spring strok e approx. 7 mm ). 2. When the largest thread loop is formed while the thread is passed around the hook, the thread c hec k spring 7 should rise sligh ...
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Pfaff 591 - page 35
Adjustment 35 1 .04.26 Thread c hec k springs (PF AFF 57 4) Requirement 1 . The mo vement of thread c hec k springs 3 and 6 should be completed when the need- le points penetrate the fabric (spring strok e approx. 7 mm ). 2. When the largest thread loop is formed while the thread is passed around the hook, the thread c hec k springs 3 and 6 should ...
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Pfaff 591 - page 36
Adjustment 36 1 .04.27 Bobbin winder ● P osition drive wheel 1 (scre ws 2 ) according to requirement 1 . ● P osition bolt 3 (screw 4 ) according to requirement 2 . Requirement 1 . When the bobbin winder is engaged, the winding spindle must be driven reliably . When the bobbin winder is disengaged, the friction wheel 5 must not be mov ed by driv ...
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Pfaff 591 - page 37
Adjustment 37 1 .04.28 Pressure of roller presser Requirement The material must be f ed smoothly . No pressure marks should be visible on the material. ● Adjust roller presser pressure with scre w 1 according to the requirement . Fig. 1 - 28 1 ...
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Pfaff 591 - page 38
Adjustment 38 1 .04.29 Lubrication Requirement Af ter a running time of 10 seconds a fi ne line of oil should form on a strip of paper held next to the hook. ● Chec k whether oil has been fi lled in and that there is no air in the oil lines. ● Let the mac hine r un for 2 - 3 min. While the mac hine is running do not place hands in the needle ...
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Pfaff 591 - page 39
Adjustment 39 1 .04.30 Re-engage saf ety coupling The coupling 1 is set b y the manufacturer . When the thread jams, the coupling 1 disengages in order to av oid damage to the hooks. A description of how to engage the coupling f ollows. ● Remo ve jammed thread. ● Hold coupling 1 with screw 2 and t urn the balance wheel, until you f eel coupling ...
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Pfaff 591 - page 40
Adjustment 40 1 .05 Adjusting the edge trimmer -725/04 1 .05.0 1 P osition of the knif e holder (on model 571) Requirement When the thread trimmer is engaged and the adjusting wheel has been t urned to its high- est position 1 . the knif e holder 2 must be parallel to the post and 2. the top edge of the needle plate must be in the centre of the ang ...
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Pfaff 591 - page 41
Adjustment 41 61-052 1 .05.02 P osition of the knif e holder (on models 57 4 and 591) Requirement When the thread trimmer is engaged, the centre of the angular knif e opening must be le- vel with the top edge of the needle plate. ● Switc h of f the mac hine and engage the edge trimmer . ● Loosen scre w 1 . ● By t urning sccentric 2 , position ...
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Pfaff 591 - page 42
Adjustment 42 1 .05.03 Knif e stroke (on model 571) Requirement The knif e stroke can be adjusted o ver a range from 1 . 0 to 3 . 5 mm , allowing the best possible adaption to all materials used. ● T urn eccentric 1 (screws 2 ) so that the marking of the desired cut ting strok e is opposite the marking on clamp collar 3 . Fig. 1 - 33 3,5 1 2 3 3, ...
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Pfaff 591 - page 43
Adjustment 43 1 .05.04 Knif e stroke (on models 57 4 and 591) Requirement The knif e stroke can be adjusted o ver a range from 2 . 0 to 3 . 5 mm , allowing the best possible adaption to all materials used. ● Adjust crank 1 (nut 2 ) in slot ted le ver 3 according to the requirement . Fig. 1 - 34 1 2 3 ...
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Pfaff 591 - page 44
Adjustment 44 1 .05.05 Cut ting stroke (on model 571) Requirement When the edge trimmer is engaged and the needle is in the needle hole, the stroke of knif e 1 should be half in front of and half behind the needle, when the motor shaf t is t ur - ned by hand. ● S witc h of f the mac hine and engage the edge trimmer . ● Adjust knif e 1 (screw 2 ...
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Pfaff 591 - page 45
Adjustment 45 1 .05.06 Cut ting stroke (on models 57 4 and 591) Requirement When the edge trimmer is engaged and the needle is in the needle hole, the stroke of knif e 3 should be half in front of and half behind the needle, when the motor shaf t is t ur - ned by hand. ● Switc h of f the mac hine and engage the edge trimmer . ● Adjust knif e ho ...
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Pfaff 591 - page 46
Adjustment 46 1 .05.07 Knif e position Requirement When the edge trimmer is engaged, the knif e should rest lightly on the needle plate in- sert, but no whistling sound should occur during trimming. PF AFF 571 ● Adjust scre w 1 (screw 2 ) according to the requirement s. ● Carr y out a cut ting test and repeat adjustment if necessar y . PF AFF 5 ...
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Pfaff 591 - page 47
Adjustment 47 1 .06 Adjusting the thread trimmer -90 0/83 1 .06.0 1 R esting position of the roller lev er / radial position of the control cam Requirement 1 . When the thread trimmer is in is resting position, lev er 5 should be touc hing piston 6 and the roller of roller lev er 7 should be 0 . 3 mm away from control cam 3 . 2. When the t ake-up l ...
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Pfaff 591 - page 48
Adjustment 48 1 .06.02 P osition of the thread catc her holder Requirement 1 . There should be a minimum amount of pla y bet ween toothed wheel 3 and toothed segment 4 . 2. Both in the neutral position and the f oremost position of the catc her , the distance bet- ween the toothed segment 4 and the outer edge of the thread catc her holder 1 should ...
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Pfaff 591 - page 49
Adjustment 49 1 .06.03 P osition of the thread catc her Requirement 1 . The bot tom edge of the thread catc her 1 should be at a distance of 0 . 1 mm from the positioning fi nger of the bobbin case 5 . 2. When the thread trimmer is in its resting position, the front edge of thread catc her 1 should be fl ush with the edge of knif e 6 . ● Mov e ...
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Pfaff 591 - page 50
Adjustment 50 1 .06.04 Knif e position and knif e pressure Requirement The knif e pressure should be set as low as possible but the cut ting operation should still be carried out reliably . ● Adjust eccentric 1 (scre w 2 ) in accordance with the requirement . Fig. 1 - 41 129-020 129-050 1 2 ...
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Pfaff 591 - page 51
Adjustment 51 1 .06.05 Bobbin thread retaining spring Requirement The tension of the bobbin thread clamp spring should be as lo w as possible, but it should reliably hold the bobbin thread af ter trimming . ● Adjust bobbin thread clamp spring 1 (scre ws 2 ) in accordance with requirement . Control ● Af ter the thread has been cut, sew a f ew st ...
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Pfaff 591 - page 52
Adjustment 52 1 .06.06 Manual cut ting test Requirement 1 . When thread catc her 1 is on its for ward strok e, it must not carr y bobbin thread 3 for - ward too. 2. When thread catc her 1 is in its front position, bobbin thread 3 must be held reliably by hook 4 . 3. Af ter the trimming action, both the needle thread and the bobbin thread must be pe ...
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Pfaff 591 - page 53
Adjustment 53 1 .06.07 Releasing the tension Requirement When the magnet is activated, tension discs 3 must be at least 0 . 5 mm apart. ● Activ ate the magnet. ● Detac h the tension bearing plate 1 and adjust pressure plate 2 in accordance with the re- quirement . It is possible to set the time for releasing the tension with the parameter funct ...
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Pfaff 591 - page 54
Adjustment 54 1 .06.08 Linkage rod (only for the PF AFF 57 4) Requirement When the thread trimmer is in its resting position, the drive le vers 1 must be parallel. ● Adjust driv e levers 1 (scre ws 2 ) in accordance with the requirement . Fig. 1 - 45 2 1 1 ...
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Pfaff 591 - page 55
Adjustment 55 1 .07 Adjustment of bac ktac king mec hanism -91 1/.. 1 .07 .0 1 Needle in needle hole (only f or PF AFF 571 and 591) Requirement When the maximum stitc h length is set, the needle must be the same dist ance from the inside edge of the needle hole, both for f or ward and re verse stitc h. ● T urn crank 1 (screws 2 ) according to the ...
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Pfaff 591 - page 56
Adjustment 56 1 .07 .02 Coupling for roller presser driv e Requirement 1 . When the roller foot is touc hing the f eed wheel and the magnets are extended, the top coupling half 1 should be touc hing the bot tom coupling half . 2. There must be a distance of 3 mm bet ween coupling half 1 and loc king disc 3 of the drive mec hanism. ● Adjust coupli ...
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Pfaff 591 - page 57
Adjustment 57 1 .07 .03 Be v el gears for f eed wheel driv e Requirement 1 . Bev el gear 3 must fi t well on the lef t side. 2. There must be a distance of 15 mm between be vel gear 3 and be vel gear 5 . ● Remo ve control unit 1 (screws 2 ). ● Adjust be vel gear 3 (screws 4 ) according to requirement 1 . ● Adjust be vel gear 5 (screws 6 ) ac ...
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Pfaff 591 - page 58
Adjustment 58 1 .07 .04 Be v el gear play Requirement 1 . When sewing f or wards, there must be a slight pla y between bev el gears 6 and 7 . 2. When sewing bac kwards, there must be a slight pla y bet ween be vel gears 6 and 8 . 3. The clearance between be vel gear 6 and the shaf t 10 must be 0 , 2 mm . ● Adjust brac k et 1 (screws 2 ) according ...
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Pfaff 591 - page 59
Adjustment 59 1 .07 .05 Adjusting the magnets Requirement When switc h unit 1 is in its lef t stop position 1 . The magnet frame 2 should be positioned at the top stop position and 2. The magnet tappet 4 should be completely extended. 3. When the magnet t appet 4 is extended, there should be no pla y bet ween the magnet tappet and lever 5 . ● Man ...
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Pfaff 591 - page 60
Adjustment 60 1 .08 P arameter set tings ● P arameter set tings are described in the separate operations manual for the drive, and ma y only be c hanged by qualifi ed tec hnicians! ...
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Pfaff 591 - page 61
61 V ersion 04.02.08 Bloc k diagram PC BDF - PICO T OP 2 Bloc k diagram 2 .0 1 PF AFF 570 / 590 with control unit P44 PD-L pow er switch Control unit P44 PD-L Control pac kage P44 PD-L 570/590 LS = Light barrier VR1 = R oller presser release VR2 = F eed switc h-ov er VR3 = VR 3 – magnet (needle) only on the 571 + 591 FSL = T hread tension release ...
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Pfaff 591 - page 62
62 VR1 FSL VR3 PF A VR2 -90 0 ST O P 570 / 590 pow er switch Mains plug Control panel C-200-1 .0 Speedcontrolunit VR1 = R oller presser release VR2 = F eed switc h-ov er VR3 = VR 3 – magnet (needle) only on the 571 + 591 FSL = T hread tension release PF A = A utomatic presser foot lif t -90 0 = Thread trimmer STOP = Start inhibitor 2 .02 PF AFF 5 ...
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Pfaff 591 - page 63
63 Bloc k diagram 570 / 590 2 .03 PF AFF 570 / 590 with MJ-0-00-21 5-CE Control uni MJ-0-00-21 5-CE Sync hroniz er pow er switch Mains plug ...
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Pfaff 591 - page 64
PF AFF Industriesysteme und Masc hinen AG Hans-Geiger -Str . 1 2 - IG Nord D-67 661 Kaiserslautern Phone: +49 - 630 1 3205 - 0 Fax: +49 - 630 1 3205 1386 E-mail: inf o@pfaf f-industrial.com Hotlines: T echnical ser vice: +49 - 1 75/2243-1 0 1 Application consult ance: +49 - 1 75/2243-1 02 Spare-parts hotline: +49 - 1 75/2243-1 03 Printed in Germany ...
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