Duerkopp Adler 744-122 Service Instructions Manual Download Page 1

Page: 1 / 26

Contents

Page

Part 3: Service Instructions 744-122

Notes Prior to Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transport Carriage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1

Right End Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2

Left End Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3

Marking on the Material Guide Rail and the Material Stopper . . . . . . . . . . . . . . . . .

2.4

Transport Carriage Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5

Material Guide Rail Stroke Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Material Stopper Mounting and Material Stopper . . . . . . . . . . . . . . . . . . . . . .

Distance from the Material Guide Rail to the Needle . . . . . . . . . . . . . . . . . . . .

Light Barrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Synchronizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Adjusting the Machine Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1

Folding Over the Machine Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2

Adjustment Disk to the Arm Shaft Crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.3

Position of the Lower Timing Belt Pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.4

Rocker Bolt for the Hook Drive and the Left Shaft Bearing . . . . . . . . . . . . . . . . . . .

7.5

Hook Drive Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.6

Needle Avoidance Movement of the Hook (Ellipse Width) . . . . . . . . . . . . . . . . . . .

7.7

Symmetry of Looper Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.8

Hook in Hook Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.9

Setting the Hook to the Needle Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.10

Needle Rod Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.11

Needle Protector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.12

Bobbin Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.13

Needle Thread Catcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Thread Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Throw-Over Stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.1

Distance to the sewing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.2

Setting the Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.3

Setting the Height of the Counterholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

9.4

Setting the Position of the Placement Plate . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.5

Setting the Speed of the Smoother Movement . . . . . . . . . . . . . . . . . . . . . . . . .

Summary of Contents for 744-122

Page 1: ... 7 2 Adjustment Disk to the Arm Shaft Crank 14 7 3 Position of the Lower Timing Belt Pulley 14 7 4 Rocker Bolt for the Hook Drive and the Left Shaft Bearing 15 7 5 Hook Drive Housing 16 7 6 Needle Avoidance Movement of the Hook Ellipse Width 16 7 7 Symmetry of Looper Motion 18 7 8 Hook in Hook Mounting 19 7 9 Setting the Hook to the Needle Center 19 7 10 Needle Rod Height 19 7 11 Needle Protector ...

Page 2: ...For all adjustments to parts forming stitches a faultless needle must be used Upon request you will receive the following adjustment gauges Order no Application 933 80207 Dail gauge 933 80193 Angle for the looper symmetry setting 933 80194 Indicator for the looper symmetry setting 933 80200 Feeler gauge for the thread take up disk 933 80203 Gauge for the hook drive housing 933 80221 Gauge for the ...

Page 3: ...t diode and a long tap of the L W R key set the parameter value to 0 with the numeric keypad A gap of 105 mm must be set between the cast guide 8 under the machine arm and the clamp piece 5 In order to avoid a collsion of the transport carriage with the machine head during a malfunction of the step motor the safety stopper 7 is to be set at a distance of 25 mm from the machine head at the right Th...

Page 4: ...d position This position corresponds to the position of the switch b7 as described in Section 2 1 It must not be altered In order to avoid a collision of the carriage by a possible malfunction the stopper 7 is to be set at a distance of 25 mm from the cast part 8 See illustration in Sec 2 1 and the dimension sketch 2 3 Marking on the material guide rail and the material stopper The marking 3 on th...

Page 5: ... When tightening the clamping piece 8 take care that the stroke cylinder 1 is vertically aligned Measure the distance to the material slider bed with the guide rod 2 in its forward and rear positions Should the distances not be equal first loosen the guide beads 6 Achieve parallelism of the guide rod 2 by adjusting the excentrically bearinged guide rollers 5 This is to be performed appropriate to ...

Page 6: ...er 1 must be set vertically The lowering stroke should be so dimensioned that the material guide rail just barely securely lays on to the material slider bed A stroke cylinder 1 set too low worsens the laying on of the material guide rail The material guide rail which is pretensioned along its whole length could lift in the middle Loosen screw 9 Set the height of the stroke cylinder 1 appropriatel...

Page 7: ...11 10 1 2 88 mm 3 4 5 6 8 ...

Page 8: ...stopper 6 so that there is an equidistant seam interval between it and the material guide rail along their complete length e g 10 mm Tighten screw 3 The sewing unit can only be started when the material stoppers have reached their end position this is when the switch b3 for the left stopper and the switch b4 for the right stopper have been activated Turn main switch on Key in Program 63 on the PRO...

Page 9: ...ic rod 2 while at the same time holding the block 7 in its position Tighten screw 8 Pressure spring 3 holds the block 7 and roller 1 down With the roller 1 in the curve path set the distance between the clamping piece 4 and the cast edge 6 at 3 mm Tighten screw 5 Bracket 9 must switch on switch b5 when the rail is raised and switch b6 when it is lowered The gap from the bracket to the switches sho...

Page 10: ...the right The height of 14 mm above the material slider bed is an approx given due to the light barrier mounting Minimal adjustments are possible after loosening the screws 10 Turn on main switch Key in Program 63 on the PROGRAM switch and activate with the STOP key Enter the number 45 for the light barrier b45 Fasten a thin carton to the material slider bed 53 mm from the needle Loosen screw 15 I...

Page 11: ...wer much out of its upper dead point The bobbin disk must be set as per Section 7 12 First turn off the main switch to check the position Bring the needle in the lower position by turning the handwheel After turning on the main switch the machine head turns to the set position Loosen the screws of the ring 4 Hold the ring and turn the handwheel so that the bobbin disk 2 moves to the position descr...

Page 12: ...er 7 1 Folding over the machine head Turn off main switch Risk of Injury Remove the material guide rail Pull the material slider bed back so far that the machine plate is exposed Screw the clamp lever 15 out of the clamp strip 13 Remove the support 14 from the pin 16 and lower Swing the control unit away to the right Remove the clamp screw 7 and the pipe connector 8 from the rod 9 Loosen the clamp...

Page 13: ...ews of the upper timing belt pulley Plug the pin 19 into the groove of the arm shaft crank Turn the timing belt pulley until the arresting pin 20 can be inserted into the deepest notch A of the adjustment disk Push the timing belt pulley to the right against the arresting pin Tighten the timing belt pulley screws Turn the handwheel until the timing belt moves to the middle of the timing belt pulle...

Page 14: ... slowly turn the lower shaft 3 Screw on gauge 1 order no 933 80221 Loosen clamp screw 5 Place the lower shaft bearing 6 on the gauge Tighten clamp screw 5 Loosen screws 4 Check to see if the rocker bolt 2 is lying so that it touches the face 3 of the lower shaft Remove the grease cap 13 and the oil drip pan 12 Loosen the set collars 15 and pulley 13 Slide the lower shaft so that there is a gap of ...

Page 15: ...ght to left the needle clearance is between 0 05 and 0 1 mm and with hook movement from left to right the tip of the downward moving needle touches the back of the hook at that moment when the hook and the needle are in the position shown in the accompanying sketch The exact dimension of the avoidance movement is dependent on the needle system and the needle thickness The ellipse width with this m...

Page 16: ...2 mm the ellipse width changes 0 1 mm Remove the throat plate Place the needle protector 16 to the rear Loosen the set collars 15 and pulley 13 Slide the lower shaft 3 in the appropriate direction until the correct dimension is attained Tighten set collars 15 so that the lower shaft 3 is tight Align and tighten the pulley 13 Loosen screw 18 and one of the screws 17 By adjusting the hook bearer 8 b...

Page 17: ...he arresting pin into notch A Fasten the angle 3 to the hook drive housing Set the indicator 1 on the hook shaft so that the tip is over the marking 2 When turning the handwheel from A to D the indicator should swing to the left When arresting in notch D the tip should again be over the marking 2 By turning the lower shaft 5 and adjusting the angle agreement is reached in both positions A and D Fu...

Page 18: ...dle center Arrest handwheel in notch C Loosen screw 7 and turn the stopper screws 8 appropriately Set a clearance of 0 05 to 0 1 mm between the hook tip and the needle Tighten screw 7 7 10 Needle bar height Turn main switch off Risk of Injury Set the needle bar height so that at the moment when the hook eye lies on the middle of the needle the upper edge of the eye of the needle lies at the center...

Page 19: ...The clearance between the hook tip and the needle should be between 0 05 and 0 1 mm The height of the needle protector 1 is properly set when its underside ends flush with the underside of the block 2 Align the needle protector 1 to the hook drive housing accordingly 7 12 Bobbin disk Turn main switch off Risk of Injury In the adjustment disk position there should be a clearance of 1 mm between the...

Page 20: ...his applies particularly to curved rails with small radii The distance at the nearest position should be about 1 mm Turn main switch off Enter Program 64 and activate with the STOP key Key in the code no 7 for the solenoid valve s7 Open Thread Catcher The thread catcher can be opened and closed with the Σ key To check the clearance the rail must be run along the open thread catcher manually This i...

Page 21: ...er When a piece of thread chain is bound off at the end of a seam and the sewing drive shut off a stroke of the thread trimmer occurs and thus the cutting stroke When the thread trimmer has clamped and cut the thread chain it again moves to the right This slackens the tensioned thread chain and thus avoids its being pulled out of the clamp by the material guide rail return run The strokes are cond...

Page 22: ...3 must be in a straight part of the rail Loosen screw 9 Set the shaft 11 in the holder 7 so that the bezel 8 can still be seen Tighten screw 9 until it touches surface With the trimmer swing out and lever 5 at the right rest place the block 6 close on the holder 7 When tightening the screw 9 take care that the plate 10 remains horizontal If the setting of the trimmer point has not been achieved th...

Page 23: ...great that the threads are cleanly cut and the counter knife 17 moves back unhindered Conduct a trimming trial in testing program P55 with three threads After entering the program and operating the Σ key the trimmer functions will occur in order d With the counter knife 17 pulled to the back and knife 20 set as per c the thread clamp plate 24 should be about 1 5 mm in front of the edge of the knif...

Page 24: ...ent to the left must be appropriate to the rail transport speed Trimmer forward cut long stroke _ throttle valve 1 Trimmer to the left tension thread chain _ throttle valve 2 Thread chain release short stroke _ throttle valve 3 Trimmer to the right slacken thread chain _ throttle valve 4 h Should the guide roller 13 not be in the material guide rail groove then the complete thread trimmer will be ...

Page 25: ...and clamping pipe 5 during the sewing sequence The stop screw 4 limits the position of the opened swung away from the stacked goods support 3 clamping pipe 5 It thus determines the opening x of the stacker The opening x can be set up between 105 and a maximum of 240 mm Loosen lock nut 4 Turn stop screw 4 until the desired opening x is reached Tighten lock nut 4 9 3 Setting the Height of the Counte...

Page 26: ...eturn movement One way restrictor 11 Regulating pull out movement The function clamping before smoothing can be activated by the pre selector b417 5 on the back of the face plate of the control unit The speed of the smoothing movement after clamping is to be regulated by the throttle 12 located on the solenoid valve strip of the sewing unit If necessary readjust the smoothing movement of the throt...

Search results

Summary of Contents for 744-122

Reviews:

Related manuals for 744-122

Brands by name

Popular brands

Duerkopp Adler 744-122, Service Instructions Manual

Search results

Summary of Contents for 744-122

Reviews:

Related manuals for 744-122

Brands by name

Popular brands