Duerkopp Adler 744-122 Service Instructions Manual
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Duerkopp Adler 744-122 Service Instructions Manual

Duerkopp Adler 744-122 Service Instructions Manual

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Contents
1.
Notes Prior to Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Transport Carriage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
Right End Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Left End Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
2.4
Transport Carriage Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5
Material Guide Rail Stroke Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Material Stopper Mounting and Material Stopper . . . . . . . . . . . . . . . . . . . . . .
4.
Distance from the Material Guide Rail to the Needle . . . . . . . . . . . . . . . . . . . .
5.
Light Barrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
Synchronizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.
Adjusting the Machine Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1
Folding Over the Machine Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2
Adjustment Disk to the Arm Shaft Crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.
Thread Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.
Throw-Over Stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.1
Distance to the sewing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.2
Setting the Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.3
Setting the Height of the Counterholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.4
Setting the Position of the Placement Plate . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5
Setting the Speed of the Smoother Movement . . . . . . . . . . . . . . . . . . . . . . . . .
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Summary of Contents for Duerkopp Adler 744-122

  • Page 1: Table Of Contents

    Contents Page Home Part 3: Service Instructions 744-122 Notes Prior to Adjustments ........Transport Carriage .

  • Page 2: Part 3: Service Instructions 744-122

    Part 3: Service Instructions 1. Notes prior to adjustment Transport carriage These servicing instructions describe the Caution in the area of moving machine parts adjustments to the sewing unit in the appropriate - Risk of Injury - order. Here it is to be noted that the various adjustment The transport carriage is guided on the extension positions are interdependent.

  • Page 3: Right End Position

    2.1_ Right End Position If the right position has been set with the L<-W->R key, right diode bright, then the carriage will stop at the right. The distance between the middle of the cylinder 4 and the middle of the needle should be 212.5_mm in the right end position.

  • Page 4: Left End Position

    Fine Adjustment 2.3 Marking on the material guide rail and the material stopper – Switch on main switch. – With the right diode lit and a longer tap of the The marking 3 on the rail and the marking 2 on the L<-W->R key, set the parameter to 0 with the material stopper must lie exactly opposite each numeric keypad.

  • Page 5: Transport Carriage Guide

    2.4 Transport Carriage Guide Turn main switch off - Risk of Injury - With curved material guide rails the guide rod 2 is moved within an allowable range crosswise to the direction of sewing. The range is properly set if there is a distance of 135 mm between the transport carriage 3 and the clamping piston 4 when the guide rod 2 is pulled to its rest at the front of the unit.

  • Page 6: Material Guide Rail Stroke Cylinder

    2.5 Stroke cylinder for the material guide rail Turn main switch off - Risk of Injury - A perfect laying-on of the material guide rail is dependent on the setting of the stroke cylinder 1. As described in 2.4, the stroke cylinder 1 must be set vertically.
  • Page 7 88 mm...

  • Page 8: Material Stopper Mounting And Material Stopper

    3._ Material stopper mounting and material stopper Turn main switch off The sewing unit can only be started when the - Risk of Injury - 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 The material stopper mounting 2 must be in a have been activated.

  • Page 9: Distance From The Material Guide Rail To The Needle

    4._ Distance from the material guide rail to the needle Turn main switch off - Risk of Injury - With the roller 1 in the curve path the distance – Pressure spring 3 holds the block 7 and roller 1 between the rubber covering of the material guide down.

  • Page 10: Light Barrier

    5._ Light barrier By seam configurations without distance measurement, e.g. Program P01, the material edges at the beginning and end are registered by the light barrier. In order that the position of the 1st stitch can be corrected for diagonally-fed material edges, the median value 5 must be selected with the when adjusting.

  • Page 11: Synchronizer

    6. Synchronizer The machine head should position when the bobbin disk 2 is at the level of the bearer plate 3. It should not jut out of the bearer plate 3 so that, even with a closed flap 1, a bobbin thread knotted to the thread stand can be drawn through (threaded) unhindered.

  • Page 12: Adjusting The Machine Head

    7._ Adjusting the machine head For some settings the machine head must be arrested in certain positions. The adjustment disk attached to the upper belt wheel has four notches, A, B, C and D, for this. In conjunction with the arresting pin 6 the letters on the handwheel show the position of the notches.

  • Page 13: Adjustment Disk To The Arm Shaft Crank

    7.2_ Adjustment disk to the arm shaft crank The deepest notch A on the adjustment disk must – Loosen the screws of the upper timing belt be set in- line with the groove in the arm shaft pulley. crank. – Plug the pin 19 into the groove of the arm shaft (Only with the adjustment disk in this position can crank.

  • Page 14: Rocker Bolt For The Hook Drive And The Left Shaft Bearing

    7.4 Rocker bolt for the hook drive and left lower shaft bearing Turn main switch off - Risk of Injury - – Loosen screws 4. – Check to see if the rocker bolt 2 is lying so that The distance between the needle center and the it touches the face 3 of the lower shaft.

  • Page 15: Hook Drive Housing

    7.5 Hook drive housing Turn main switch off - Risk of Injury - The needle tip should point to the middle of the hook shaft and the lower edge of the hook shaft lie parallel to the bottom of the throat plate. This means a clearance of 50.5 mm between the lower edge of the hook shaft and the throat plate rest.
  • Page 16 – Then set the hook shaft 6 at its highest point – Loosen the set collars 15 and pulley 13. with the handwheel. Slide the lower shaft 3 in the appropriate Read the difference from the dial gauge. direction until the correct dimension is attained. If the result does not agree with the given –...

  • Page 17: Symmetry Of Looper Motion

    7.7 Symmetry of looper motion Turn main switch off - Risk of Injury - Symmetry of looper motion means that in the direction of machine rotation from notch A to notch D the indicator 1 makes a pendulum movement to the left from marking 2 and returns again precisely above the marking 2 when D is reached.

  • Page 18: Hook In Hook Mounting

    7.8 Hook in the hook bearer Turn main switch off - Risk of Injury - In relation to the machine plate the hook front should be in a position of 89° 30’, that is, the hook tip must point slightly forward of the theoretical line of hook movement.

  • Page 19: Needle Protector

    7.11 Needle protector Turn main switch off - Risk of Injury - The needle protector is to hinder a diversion of the needle into the hook path. The hook and needle bar height must be set as described above. When in the course of the hook movement from right to left the hook tip reaches the needle and one presses against the needle at this moment, the needle should lay onto the needle protector.

  • Page 20: Needle Thread Catcher

    7.13 Needle thread catcher When sewing without a stitch chain, that is, by slits or seam interruptions, the bobbin and needle threads are drawn after by a certain amount. The thread trimmer then cuts off both threads. The bobbin thread is held clamped by the trimmer and the needle thread by the thread catcher 6.

  • Page 21: Thread Trimmer

    8. Thread Trimmer Function When the material edge is registered by the light When the thread trimmer has clamped and cut the barrier the thread trimmer swings to the left and thread chain, it again moves to the right. This tensions the clamped thread chain for a secure slackens the tensioned thread chain and thus seam beginning.
  • Page 22 Adjusting a) The trimmer point 4 should not cover the stitch hole in the throat plate. This applies especially in the curve of the rail. (Danger of breaking the needle.) The edge 3 of the trimmer point should lie to the left at the circular recess in the material slider bed as shown in the illustration.
  • Page 23 b) The trimmer point must lay on at the front and be tight but easily moveable on the material slider bed. This is necessary so that no threads can get between the trimmer point and the material slider bed. – If the trimmer point does not lay on, adjust the trimmer accordingly.
  • Page 24 f) With switched on cutting stroke the counter knife 17 should move so far to the front that the middle of the catcher groove 30 lies about even with the needle. – Enter testing program 55 and switch on the cutting stroke position (long stroke) with the key to check.

  • Page 25: Throw-Over Stacker

    – Loosen both clamping screws 6. 9. Throw-Over Stacker – Set the counterholder 9 to the desired height. – Tighten clamping screws 6. The following base settings of the throw-over stacker were made at the factory. 9.4 Setting the Position of the They are to be corrected only in exceptional cases.

  • Page 26: Setting The Speed Of The Smoother Movement

    9.5 Setting the Speed of the Smoother Movement The pull-out and return movements of the smoother 5 are to be quick but not jerky. The speeds of the movements are regulated at the one-way restrictors 10 and 11. – One-way restrictor 10: Regulating return movement –...

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