Duerkopp Adler 745-22 Service Instructions Manual Download Page 68

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11.16 Thread Puller for the Needle Threads

The thread puller 4 pulls a set quantity of needle thread forward out of
the opened thread tension.
The quantity of needle thread pulled forward must be large enough to
meet the following conditions:
–

At the beginning of sewing the needles moving downward should
not pull the needle threads out of the needle thread clamp.

–

At the same time a firm stitch pull must still be assured at the
beginning of sewing.

Caution Risk of Injury !

Turn the main switch off.
Set the thread puller only with the main switch turned off.

–

Loosen lock nut 3.

–

Set the deflection of the thread puller 4 by turning the stop screw 2.

–

Tighten lock nut 3.

–

Set the movement speed of the thread puller 4 at the throttle
valve 1.
The movement should be rapid, but not jerky.

Summary of Contents for 745-22

Page 1: ... Clamp Adjustment 745 23 18 5 Marker Lights 20 6 Knife Brackets for Cutting the Corners 23 6 1 Adjusting the Position of the Corner Incisions 24 6 2 Adjusting the Knife Brackets for Bias Corner Incisions 745 24 28 6 3 Changing the Corner Knives 745 22 and 745 23 30 6 4 Changing the Corner Knives 745 24 31 7 Adjusting the Piping Reverser 745 23 32 8 Cloth Slider Plate and Support Plate 34 9 Stroke ...

Page 2: ...reads 65 11 15 Trimming and Clamping Device for the Underthreads 66 11 16 Thread Puller for the Needle Threads 68 11 17 Winder 69 11 18 Changing the Needle Holders 70 12 Setting the Optional Equipment 72 12 1 Draw off Device and Bundle Clamp 72 12 2 Length controlled Feed and Trimming Device for Reinforcement Strips 73 12 3 Holder Pocket Bag and Waistband Clamp 74 12 4 Reflecting Light Barrier for...

Page 3: ...e clamp linings Run the lowered transport clamps into the rear end position only with cloth in place Caution Risk of Injury Before repair conversion and maintenance work Turn the main switch off Exception Setting work conducted with testing setting or sewing programs of the control unit Adjustment work and function testing with the sewing unit running Conduct adjustment work and function testing w...

Page 4: ...ife NA 16 mm Gauge 0792 007678 Corner knife NA 20 mm Replacement parts The following replacement parts in the numbers listed are in the accessories pack Subclass Replacement part Pieces Order no 745 22 23 24 Center knife 1 0246 002553 Special bobbin for the 6 0246 003058 remaining thread monitor 745 22 23 Corner knives NA 8 mm 2 0746 060693 2 0746 060694 or Corner knives NA 10 mm 2 0746 060689 2 0...

Page 5: ...is guided on the extension pipes 2 by ball sleeves on the left and by rollers on the right The rollers 1 are set tight at the factory Caution Risk of Injury Turn the main switch off Set the play of the rollers 1 only with the main switch turned off To remove play Remove the cover plate after loosening the mounting screws Loosen one of the eccentrically bearinged rollers 1 and set tight 1 2 5 ...

Page 6: ...n switch on Step back on the left pedal The transport carriage runs into its rear end position Step forward on the left pedal The transport carriage runs into its forward end position It runs over the switch b2 reference position along its path After a further run of approx 80 mm it stops in the forward end position Check the clearance of 306 mm from the forward edge of the forward lying needles t...

Page 7: ...e pneumatic valve Turn the main switch on Step back on the left pedal The transport carriage runs into its rear end position Check the clearance dimension of 5 mm between the damper discs 1 and the transport carriage 2 Check if the pneumatic valve 3 is opened by the surface 2 on the transport carriage Correcting the positions of the switch and the pneumatic valve Caution Risk of Injury Turn the ma...

Page 8: ...g belt tension No flawless tooth interlocking between the belt teeth and the pulley teeth Jumping of the teeth under load Attach the test load in the middle the timing belt e g with the aid of a spring scale The timing belt is correctly tensioned when the upper half of the belt just touches the lower half of the belt To correct Correct the timing belt tension at nut 2 The nut 2 is equipped with a ...

Page 9: ... timing belt clamp 1 pull the timing belt out of the housing 4 Inserting the new timing belt Push one end of the timing belt through the opening 3 on the timing belt pulley of the step motor Carefully turn the timing belt pulley for placement of the timing belt with a suitable tool The timing belt pulley is accessable through the opening 3 To connect the two timing belt ends slacken the timing bel...

Page 10: ...he pocket opening The measurement line 2 was traced on the machine plate at the factory It runs parallel to the center of the pocket opening that is to the center knife incision at a clearance of 125 mm By proper mounting of the folder 1 it can be aligned from the measurement line to the center of the pocket opening see Chapter 3 2 Proper mounting of the folder The folder 1 is pushed up onto the c...

Page 11: ...oosen nut 6 Set the mounting of the cylinder 7 higher or lower accordingly Tighten nut 6 With the folder lowered The clearance between the folder sole and the cloth slider plate must be 2 mm along the whole length Loosen nut 10 Set the clearance between the bottom of folder sole and the cloth slider plate by turning the piston rod of the cylinder 7 If the roller lays on in the lowest point of the ...

Page 12: ...5 monitor the two end positions of the folder Switch b4 Monitoring of the upper folder position switch b5 Monitoring of the lower folder position The checking of the correct switch settings occurs in program P63 Turn the main switch on Set the Program switch to 63 Press the STOP key The program is activated Set the Program switch to 4 switch b4 or 5 switch b5 The display shows the switching status...

Page 13: ... 125 mm Example from the sketch 125 mm a 1 2 x NA x 125 mm 5 mm 1 2 x 12 mm 114 mm Piping widths and needle clearances for other folders can be found in the Operating Instructions Caution Risk of Injury Turn the main switch off Align the folder to the center of the pocket opening only with the main switch turned off Loosen screws 16 slightly Align the folder sole parallel to the measurement line 1...

Page 14: ... deflected When the center knife 1 enters the knife guard 2 in the most forward position there must still be a clearance of 0 5 to 1 mm between the front edge of the knife and knife guard Caution Risk of Injury Turn the main switch off Align the folder to the needles and the center knife only with the main switch turned off To correct Loosen screws 3 slightly Slide the folder in the direction of t...

Page 15: ...old the guide plates down on the folder sole with a slight pressure The pressure must so dimensioned that the sprung guide plates can be easily raised by the piping strip running in or by the flap Caution Risk of Injury Turn the main switch off Correct the pressure of the leaf springs only with the main switch turned off To correct Set the pressure by adjusting the leaf springs 1 1 mm 1 2 15 ...

Page 16: ...7 points to the marking I the correct clearance for sewing medium weight material of two sided piped pocket openings is set The second marking gives the clearance for sewing a greater piping width or a one sided piped pocket opening By stepping forward or back on the left pedal conduct test runs with the transport carriage The transport clamps must pass the guide plates 4 and the thread catcher 3 ...

Page 17: ...8 7 6 5 1 2 3 4 17 ...

Page 18: ...7 and clamping piece 5 must be approx 3 mm with the piston rod 8 fully extended Insert the folder for dual piping The extended pin 3 operates the valve 4 for the quick clamp adjustment The correct clearance of the transport clamps to the folder sole is automatically set Slide the transport carriage manually until the transport clamps lie at the level of the folder sole Loosen clamping screw 10 Set...

Page 19: ...1 2 3 4 7 8 9 10 5 6 19 ...

Page 20: ...earances from 15 mm to a maximum of 25 mm can be set by setting the large H light marker higher or lower 1 Needles 4 Light marker rear positioning point 2 Light marker forward positioning point 5 Center of the pocket opening 3 3rd marker light on request 6 Measurement line After setting the marker lights higher or turning them it is essential that the following points be observed Reset the lamp ho...

Page 21: ...ght marker see sketch Turn the lamps in the lamp holders 12 The crosswise line of the H light marker must lie parallel to the measurement line 6 Tighten clamping screws 8 Loosen the clamping screws 11 on the holder block 10 slightly Set the clearance of the light markers to the measurement line 6 by pushing in or pulling out the lamp holder 12 Tighten clamping screws 11 Loosen clamping screws 7 sl...

Page 22: ...ece Position the sewing piece with the chalk mark on the forward crosswise line of light marker 2 Start the sewing procedure The seam must begin on the chalk mark To correct Realign marker light 2 after loosening its holder Light marker 4 seam end Set the key on the front panel of the control unit to Positioning point rear The LED above the key is off Make an analogous check of the alignment of th...

Page 23: ...ing and setting is to be made at the widest point of the corner knife with the knife bar raised Tilt the machine head to the back Set the clearance dimension of 130 mm by turning the stop screw 1 745 22 and 745 24 or 2 745 23 The stop screws 1 and 2 are in the area under the hooks The knife incisions must end at the seam beginning before the first and at the seam end before the last stitch see ske...

Page 24: ...njury Turn the main switch off Adjust the position of the corner incisions only with the main switch turned off Adjusting the corner incision of the knife bracket seam beginning The knife bracket seam beginning must cut up to in front of the first stitch see sketch 745 22 24 Loosen the clamping lever 3 745 23 Loosen screw 5 Set the position of the corner incision at the seam beginning by sliding t...

Page 25: ...745 22 745 23 745 24 5 4 3 4 3 4 25 ...

Page 26: ...ctly set for the changeover to the sewing distances L2 and L3 see Operating Instructions Aligning the corner incisions to the seams The corner incisions must lie symmetric to the seams illustration a The clearance of the incision ends to the seams must be equal on both sides illustration b Loosen screw 8 Turn rod accordingly Set a clearance of approx 5 mm between the block 1 and the knife bracket ...

Page 27: ...745 22 745 23 745 24 7 9 2 6 5 7 9 1 2 3 4 5 6 7 8 9 5 mm 10 11 12 13 14 15 27 ...

Page 28: ...e awl rod and knife rods The setting is made with gauge 11 ATTENTION Only at the seam beginning knife bracket Remove block 18 including stop screw 1 Loosen screws 17 for this Loosen screws 27 Remove clamping pieces 16 and corner knife 26 Loosen screws 14 Remove the awl rod 25 Loosen clamping screws 23 32 and 33 Insert gauge 11 into the groove of the awl rod 13 Tighten screws 14 Turn the forks 22 o...

Page 29: ... of the position plate 28 is set at the factory It must only be reset after the removal of the block 18 e g for setting the awl rods and knife rods Loosen lock nut 2 Turn back the stop screw 1 slightly Turn the setting screw on star knob 20 until its surface 19 lies centered in block 18 Set the base position of the position plate 28 with the stop screw 1 In the base position the marker lines on th...

Page 30: ... complete with the corner knives 2 and the awl 1 off of the knife bar For safe working clamp the knife holder 5 in a vise Loosen clamping screw 3 The clamping collar in the knife holder 5 is released Remove awl 1 and both corner knives 2 Insert new corner knives in the slits of the knife holder 5 Attention The angle ground blades must show to the outside Insert the awl 1 into the appropriate drill...

Page 31: ...ons Caution Risk of Injury Turn the main switch off Change the corner knives only with the main switch turned off Danger of cuts Do not reach into the sharp blades of the corner knives Loosen screw 3 Remove corner knife 2 Carefully push the new corner knife 2 between clamping piece 4 and knife holder 5 Attention The angle ground surface 1 of the corner knife 2 must show to the outside Tighten scre...

Page 32: ...r 1 has air see illustration a After the venting of cylinder 1 they move outward in the direction of the arrow into the reversing position see illustration b In the reversing position the reversing tools 2 and 3 must securely engage the piping strip when retracting The corner incision however should not be damaged by the retracting reversing tools With a correct setting the clearance between the c...

Page 33: ... the reversing tools of the piping reverser parallel to the pocket opening Secure rod 3 against turning and tighten lock nut 4 Converting the reversing tools by altered needle clearance When changing to another needle clearance NA Replace the rings 1 Adjust the number of plates 2 to the new needle clearance Note The individual operating steps of the piping reverser can be tested in the aid program...

Page 34: ...plate 1 is only unlocked in the transport carriage end position and with the main switch turned off Remove the cloth slider plate 1 see Operating Instructions Loosen screws 3 slightly Set the cloth slider plate 1 forward by sliding the holder plate 2 Tighten screws 3 again Loosen the screws to be found under plate 4 Set the cloth slider plate 1 at the rear by sliding the plate 4 Tighten the screws...

Page 35: ... clamp left and or 0792 011162 clamp right the clearance of the flap clamps to the slider plate is 40 mm Step back on the left pedal The transport carriage runs into its rear end position Caution Risk of Injury Turn the main switch off Set the stroke height of the transport clamps only with the main switch turned off Turn the main switch off Raise the cover hood Remove the compressed air hoses at ...

Page 36: ... needle position 2nd needle position Needle high position With the needle bars turned off in the highest position the thread lever must position 2 mm behind its upper dead center Turn the main switch off Bring the thread lever into a central position by turning the handwheel Turn the main switch on The sewing unit positions in the needle high position Position 2 Check the position of the thread le...

Page 37: ...ews Loosen clamping screw 5 Turn light screen 4 The light apertures of the light screens 3 and 4 must lie exactly opposite each other displaced 180 Attention When turning light screen 4 light screen 3 should not also turn Tighten clamping screw 5 ATTENTION The light screens should not turn when the clamping screw 5 is turned Turn the main switch on Set the Program switch to 67 Press the STOP key T...

Page 38: ...the main switch turned off Turn the main switch off Loosen screws 7 and 9 Remove the cylinder 11 with swing lever 12 Remove the head cover 10 after loosening the mounting screws Take out the needle bar link see Chapter 11 2 4 After screwing out its mounting screw Attention left handed thread loosen the needle tie rod from the crank pin 1 and pull off with the needle cage Turn the handwheel until t...

Page 39: ...rication gap Tighten the Allen screws 2 and support screw 3 Remove gauge 13 Check the ease of movement of the machine by turning the handwheel Place the needle tie rod with the needle cage on crank pin 1 and tighten its mounting screw Attention left handed thread Replace the needle bar link and set see Chapter 11 2 4 Reattach the head cover 10 and cylinder 11 with swing lever 12 10 11 12 7 8 9 13 ...

Page 40: ... the needle bar link at the seam beginning and seam end occurs through the cylinder 2 After the setting of the eccentric axle 4 the seam bartacking plus the needle transport give a swing range of approx 3 5 mm The slit 7 must lie in the lower semicircle of the eccentric axle 4 In the idle position of the cylinder 2 spring return position the clearance of the needles needle thickness Nm 100 to the ...

Page 41: ...latch 1 down Bring the needle bars into the low position by turning the handwheel Loosen clamping screw 6 Turn the eccentric axle 4 until the needles enter in the middle of the needle hole The slit 7 must thereby lie in the lower half of the semicircle of the eccentric axle 4 Tighten clamping screw 6 Remove spacer 3 The needles are in the forward position The clearance of the forward edges of the ...

Page 42: ...dwheel A little resistance must be felt Push in the 2 8 mm high setting side marked by the drilled hole With a correct setting this side of the gauge should not be able to be pushed in between the needle bar link and clamping collars Turn the handwheel The handwheel should not be able to be turned beyond the upper dead center Correcting the setting Loosen screws 6 Loosen lock nuts 7 Set the cleara...

Page 43: ...1 2 3 4 5 6 7 8 0 2 mm 9 10 43 ...

Page 44: ...t the clearance by sliding the cylinder 6 In the lowest operated position of the latch 3 The swing lever 9 with its bottom 8 must move past approx 1 mm above the edge 4 of the latch Loosen the lock nut on setting screw 7 Pull the latch 3 to the back against the stopper 1 Press latch 3 down into its lowest position manually and hold fast Turn the handwheel until the swing lever 9 moves into the rec...

Page 45: ... of the stopper 1 Tighten clamping screw 13 Attach all removed parts head cover cylinder with swing lever for the thread puller again Position of the needle bars to the center knife The needle bars must move counter to the center knife With the needles lying low the drive lever 12 must be in its upper dead center It is essential to make a precise setting as per Chapter 11 12 1 10 9 11 12 13 3 4 8 ...

Page 46: ...en clamping screw 13 slightly Pull the knife drive lever 14 off of shaft 12 Attention wedge Loosen screws 19 Remove guide plate 18 Loosen screws 5 Carefully pull the holder plate 7 with needle bar link 15 off of the stop pin 1 The pulling off is made easier with a little turning back and forth If necessary loosen one setting screw 2 ATTENTION Do not loosen both setting screws 2 The link frame is s...

Page 47: ...he peg of the tie rod for the link swing movement Screw screws 5 in and tighten only slightly because of a setting to be made later Remove the cover found on the head of the machine arm after loosening the mounting screws Insert the oil wick 22 under the oil felt in the machine arm with a screwdriver The oil wick 22 serves for lubricating the needle bars Fasten guide plate 18 with the screws 19 Lo...

Page 48: ...easuring sleeve 2 of the gauge must catch over the peg of the hook shaft Tilt the machine head to the back Remove oil baffles 7 after loosening the mounting screws Remove the plastic plugs 6 Loosen the screws found under the plastic plugs Loosen screws 5 Remove the pressure pins 8 Push the hook shaft with its shoulder 1 until under the measuring sleeve 2 of the gauge In this position tighten the s...

Page 49: ...ghtly Slide the worm wheel 3 axially The clearance between the worm wheel 3 and the inner side of the hook housing must be 0 3 mm The clearance must at the right hook housing be at the right and at the left hook housing at the left of the worm wheel Measure the clearance with a feeler gauge Set the tooth play by turning the eccentric bushing 5 The tooth play between worm wheel and worm should be s...

Page 50: ...uitable spacer 2 13 5 mm thick between the cylinder 1 and its piston rod Tilt the machine head to the back Remove the plastic plugs 5 Remove the screws found under the plastic plugs 5 Tilt the machine head forward Push the arresting pin 4 through the drilled hole in the machine arm The arresting pin 4 must catch in the groove of the arm shaft crank Turn the hook manually until the hook points lie ...

Page 51: ... with the main switch turned off The looping stroke must be set as per Chapter 11 5 Remove the folder and needle plate Swing the needles to the center of the needle hole Here clamp a suitable spacer 3 13 5 mm thick between the cylinder 1 and its piston rod Remove the needles from the needle holders 5 For turning the needle holders turn one of the needle bars off For this press latch 2 down and hol...

Page 52: ...hine arm The arresting pin 10 must catch in the groove of the arm shaft crank Push the setting pin 6 into the needle holder 5 up to the stop Tighten screw 13 Screw screw 11 out Turn needle holder 5 downward It should be possible to push the measuring bridge 4 under the setting pin 6 with the least possible play If necessary turn the needle holder 5 back higher accordingly The front surfaces 12 of ...

Page 53: ...f the left hook point is to be made with the needle bar link swung forward The right hook point is set with the needle bar link swung to the back Caution Risk of Injury Turn the main switch off Set the clearance of the hook points to the needle only with the main switch turned off The looping stroke and the needle holders must be set as per Chapter 11 5 and 11 6 Remove the folder and needle plate ...

Page 54: ...up to the stop Tilt the machine head to the back Remove the oil baffles 11 after loosening their mounting screws Loosen screws 10 and 13 Slide the hook bracket 12 sideways The hook point should lightly touch the measuring surface 9 of the setting pin 5 but not displace it Tighten screws 10 Tighten screws 13 Mount the oil baffles 11 again 10 11 12 13 5 9 7 6 7 8 54 ...

Page 55: ...point lying at the center of the needle there must be a clearance of 0 1 mm between the furrow of the needle and the hook point 5 Caution Risk of Injury Turn the main switch off Set the needle guard only with the main switch turned off The looping stroke and the needle holder must be set as per Chapter 11 5 and 11 6 Remove the hook cover and bottoms of the bobbin case see Chapter 11 9 Loosen screw...

Page 56: ...e bobbin case Loosen the mounting screws 1 of the hook Lift the hook from the hook shaft and remove Place a new hook on the hook shaft The position of the hook on the hook shaft is determined by the arrangement of the drilled holes in the bottom of the hook This assures that the hook point lies at the center of the needle again after the looping stroke is completed Insert the bottom of the bobbin ...

Page 57: ...ugh the recess in the needle plate Settings There must be a thread through feed gap of 0 6 to 1 mm between the edge 7 of the securing nose and the edge of the needle plate recess In this position the edge 8 of the top of the bobbin case lies about parallel to the needle plate The gap assures a through feed even with thicker sewing threads At the same time a sufficient jumping back of the top of bo...

Page 58: ...w 6 see photo pg 53 Set the height the plate 5 The holding wire 1 must lay on in front of the edge 2 of the top of the bobbin case 9 ATTENTION During the hook turning movement the back of the hook 10 should not strike under the holding wire 1 Set the height of plate 5 accordingly Tighten screw 6 Loosen screw 4 Slide plate 5 The clearance between the securing nose 7 and the edge of the needle plate...

Page 59: ...cting surface 7 of the bobbin hub this must be shown in the display A reflection of the left light barrier is shown in the left half of the lower line of the display by the symbol A reflection of the right light barrier is shown in the right half of the lower line of the display by the symbol If no reflection is indicated when turning the empty bobbin then the alignment of the light barrier is to ...

Page 60: ...d knife in the lower dead center Loosen screws 2 Set the height of center knife 3 Tighten screws 2 Loosen screw 1 Loosen screws 6 Set the knife holder 5 with center knife 3 to the left against the fixed knife in the needle plate The center knife 3 must lay on parallel and with a light pressure Tighten screw 1 and screws 6 Conduct a cutting trial To correct Set the center knife 3 to cutting through...

Page 61: ... the machine head to the back Loosen clamping screws 2 Turn eccentric 4 so that the center knife moves counter to the needle bars Tighten clamping screws 2 Loosen clamping screws 3 Turn the counterdisc 5 into the same position as the eccentric 4 The clamping screws of the eccentric 4 and the counterdisc 5 must be in line Tighten clamping screws 3 Tilt the machine head forward 1 2 3 4 5 61 ...

Page 62: ...r Set the knife bar drive lever 8 in its upper dead center by turning the handwheel Remove the winder cap after loosening the mounting screws Loosen screws 13 of the stroke lever 12 Put air into operating cylinder 9 and engaging cylinder 1 For this set the Program switch to 64 program P64 Activate the program by pressing the STOP key Set the Program switch to 13 solenoid valve s13 Run cylinders 9 ...

Page 63: ...s lower dead center by turning the handwheel Prerequisite The piston rod of the operating cylinder 9 must have caught in the groove 4 Check the ease of movement of the knife bar bridge 5 on the link frame 12 13 1 2 3 4 5 6 7 8 9 10 11 63 ...

Page 64: ...r that the needles will stitch into the threads during their downward movement Caution Risk of Injury Turn the main switch off Set the thread controller springs only with the main switch turned off Spring deflection Loosen screw 1 Set the regulator 3 by turning Tighten screw 1 Spring tension Loosen screw 1 Turn bushing 2 Turning clockwise Increase spring tension Turning counterclockwise Decrease s...

Page 65: ...ade by the short stroke of the cylinder 1 Through the spring suspended clamping piece 4 the thread catcher 5 lays level onto the knife 2 The knife 2 thus lies automatically for cutting A setting is not required Changing the knife and thread catcher After a certain period of operation the knife 2 loses its sharpness The blunt knife must be removed for grinding By a change to a different needle clea...

Page 66: ...g plates 5 close The underthread shears 1 cut the underthreads With every work cycle the underthread shears 1 are cleaned by a jet of air This prevents the clamping in of lint and thread ends Setting The upper edge of the underthread shears 1 must lie at the same height as the top of the needle plate Underthread shears lying too high can cause damage to the material With the underthread shears lyi...

Page 67: ...amping plates 5 The spring clamping plates must lay on level at the needle plate walls with a light spring pressure Check the safety clearance of the hook points to the pneumatically opened spring clamping plates If necessary adjust the limiter plates 4 accordingly Regulate the jet of air for cleaning the underthread shears at the throttle valve 8 The stitch formation should not be effected by the...

Page 68: ...ward should not pull the needle threads out of the needle thread clamp At the same time a firm stitch pull must still be assured at the beginning of sewing Caution Risk of Injury Turn the main switch off Set the thread puller only with the main switch turned off Loosen lock nut 3 Set the deflection of the thread puller 4 by turning the stop screw 2 Tighten lock nut 3 Set the movement speed of the ...

Page 69: ... with the main switch turned off Correcting the bobbin capacity Remove the winder cap 3 after loosening the mounting screws Loosen the clamping screw 2 slightly Set the bobbin capacity by turning the operating cam 1 Turning in the direction of the arrow A Decrease bobbin capacity Turning in the direction of the arrow B Increase bobbin capacity Tighten clamping screw 2 Replace the winder cap 3 agai...

Page 70: ...ve the needle from needle holder 3 ATTENTION A change of a needle holder is only possible when the affected needle bar is in the low position The other needle bar must be turned off Push latch 1 downward and hold Turn on both needle bars by turning the handwheel Turn the handwheel farther Before reaching the upper dead center manually press the needle bar to be turned off under the needle holder A...

Page 71: ...ar Set the height of the needle holder 3 see Chapter 11 6 Tighten screw 2 Check the entry of the needle into the needle hole of the needle plate Check and or set the sideways clearance of the needle to the hook see Chapter 11 7 The change of the second needle holder occurs in the same manner 2 3 4 2 3 71 ...

Page 72: ...e height of the spar 5 The lowered transport rollers 1 must touch roller 2 The angle 3 can be swung out Therefore there must be a certain clearance between the angle 3 and the draw off device Align the height of spar 5 appropriately Tighten the mounting screws on the clamping piece 7 Set the lowering speed of the transport rollers 1 at the one way restrictor valves 8 and 9 The lowering movement sh...

Page 73: ...ly An uncontrolled advancing is to be avoided Regulate the advance speed of the transport roller at the throttle valve 4 Setting the clamp on pressure During the advance the clamping plate 1 operated by cylinder 3 holds the reinforcement strip clamped During the transport and sewing procedures the clamping plate 1 is raised Loosen lock nut 5 Set the clamp on pressure of the clamping plate 1 by tur...

Page 74: ...clamp only with the main switch turned off Setting the holder 6 Loosen the screw on the clamping piece 2 Set the height of the holder 6 With the knee switch operated the extended piston rod must press on the cloth slider plate Tighten the screw on the clamping piece 2 Loosen the screws on the clamping piece 1 Align the holder 6 toward the back in direction of the machine head The piston rod should...

Page 75: ... alignment of the waistband clamp 4 establish how much of the waistband is to be engaged Tighten screws 7 Tilt the machine head to the back Regulate the movement speed of the waistband clamp 4 at throttle valve 8 The movement should occur quickly but not with a jerk 7 4 8 75 ...

Page 76: ...ies pack 55 mm in front of the needles The light barrier should recognize the reflecting foil precisely at this point The first line of the display must show B44 If necessary correct the alignment Scan the reflecting foil 1 by pushing the transport carriage back and forth The first line of the display must show B44 along the whole length If the display changes to B44 Align the reflecting light bar...

Page 77: ...uld lie in front of and the last stitch behind the flap edge see illustration a Loosen screws 7 at joint picture b or c Slide the light barrier b44 counter to or in the direction of transport until the position of the seam is achieved as per illustration a Tighten screws 7 a b c b44 1 2 b44 3 4 5 6 b44 7 77 ...

Page 78: ...he stacker open the counterholder 7 lies under stacked goods support 2 The clearance y between the counterholder 7 and stacked goods support 2 is adjustable between 30 and 170 mm For material which is just barely clamped by the stacker on the feed side a smaller clearance y must be set Loosen both clamping screws 8 Set the counterholder 7 to the desired height Tighten clamping screws 8 12 5 3 Sett...

Page 79: ...2 3 4 5 y 7 1 8 6 9 10 1 2 3 4 5 79 ...

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Duerkopp Adler 745-22, Service Instructions Manual

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