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Summary of Contents for Dürkopp Adler 884
- Page 1 Service Instructions...
- Page 2 All rights reserved. Property of Dürkopp Adler GmbH and copyrighted. Reproduction or publication of the content in any manner, even in extracts, without prior written permission of Dürkopp Adler GmbH, is prohibited. Dürkopp Adler GmbH - 2021 Copyright ©...
- Page 3 Introduction This service booklet contains the instructions for setting the sewing machine head mechanisms. The directions for putting the machine into operation and for setting the positioning drive are contained in another publication. The service booklet is common for all subclasses of the machine and contains also the instructions for setting optional accessories of the machine, if this is necessary owing to their complexity.
- Page 4 General safety instructions The non-observance of the following safety instructions can cause bodily injuries or damages to the machine. 1. The machine must only be commissioned in full knowledge of the instruction book and operated by persons with appropriate training. 2.
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Page 5: Table Of Contents
Index Page Service Instructions for the Class 884 (Edition 11.2021) General Setting gauges .......... - Page 6 Index Page Electronic control and sewing machine drive - positioning motor ....Terminals to PCB connections - electromagnetic variant ..... . . Terminals to PCB connections - pneumatic variant .
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Page 7: General
Note Some shafts on the special 884 machine are provided with flat eccentric surfaces. This significantly simplifies machine adjustments. For all adjustments on flat surfaces, the first screw screwed in the direction of the eccentric surface. -
Page 8: Adjusting The Handwheel
Adjusting the handwheel Rule: The handwheel (4) is labelled with degree numbers. Certain adjustments are made with these marked handwheel positions. – Turn the handwheel until the degree value specified in the instructions is aligned with the pointer (3). – Proceed with the adjustment described. -
Page 9: Sewing Machine With Direct Drive
1.2.2 Sewing machine with direct drive – Unscrew three fixing screws on the hand wheel (5) and remove it. – Put the needle in the upper dead point and insert the setting pin (2), which is a part of the sewing machine accessories and which is fixed on the oil tray bottom side, into the crank head. -
Page 10: Bottom Feed
Bottom feed Basic setting for stitch adjustment and stitch length limit Rule: 1. When setting the stitch length at “0”, the stitch regulator gear should have as little play (clearance) as possible when you press down on the bartacking lever. 2. -
Page 11: Stitch Uniformity For Forwards And Reverse Stitching
Stitch uniformity for forwards and reverse stitching Rule: 1. When making a rough-scale adjustment to the stitch regulator gear, the machine should not feed when the stitch length is set to “0”. 2. When making a fine-scale adjustment to the stitch regulator gear, the forwards and reverse stitch lengths should only deviate in value by a half stitch. -
Page 12: Adjusting Of Feed Shaft Position And Clutch Lever Position
Adjusting of feed shaft position and clutch lever position Rule: When setting the stitch length to “0“ the groove on the feed shaft front side is in the vertical position. The feed clutch should be in the central position. – Set the stitch length to “0”. -
Page 13: Position Of The Eccentric Tappet For The Feed Movement
Position of the eccentric tappet for the feed movement Rule: When the handwheel pointer indicates “0” degrees, the feed lever (1) should not move when the bartacking lever is pressed down. – Turn the handwheel so that the pointer indicates “0“. –... -
Page 14: Switching Over The Feed Clutch
Switching over the feed clutch Rule: The clutch should be switched over when it is motionless (i.e., when it is in the dead centre point of its pendulum motion). – Loosen the screws (1) on the eccentric tappet (2). – Turn the eccentric tappet (2) so that the dash is aligned with the other dash (3). -
Page 15: Position Of The Eccentric Tappet For The Switch Over Of The Feed Clutch
Position of the eccentric tappet for the switch over of the feed clutch Rule: When the handwheel pointer indicates “313” on the scale, the dash (1) on the eccentric tappet should be lined up with the lower dash (2) on the V-shaped push rod. -
Page 16: Checking The Switch Over Of The Feed Clutch
Checking the switch over of the feed clutch Rule: The feed clutch should be switched over when it is motionless (i.e., when it is in the dead centre point of its pendulum motion). This can be detected from the rotational direction of the belt pulley (1) in front of and behind the dead centre point. -
Page 17: Wheel Feed
Wheel feed Rule: 1. The wheel feed elevation (A) over the throat plate insert should be adapted to the material thickness and hardness: Soft or thick materials – 0.6 mm Thin materials – 0.2 mm 2. The wheel feed knurling should be adapted to the sewn material character: Soft material –... - Page 18 Wheel feed (A) elevation change – Unscrew the screws (2) and dismantle the throat plate (1). – Unscrew the screws (9). – Turn the pin (5) with its upper side down. – Screw the screws (9) on. – Mount the throat plate (1) and screw the screws (2). Wheel feed replacement –...
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Page 19: Top Feed
Top feed Position of the needle holder with single needle sewing machines Rule: The position of the needle holder is to be set according to the picture. Angular position of the needle holder Needle thickness/Nm 70 - 110 – Loosen screw (1) and turn the needle bar with the right groove edge (2) to the needle bar axis (in sewing direction) and tighten screw (1). -
Page 20: Needle Feed
Needle feed Rule: 1. The needle bar should be laterally adjusted to flush with the presser bar. 2. The wheel feed holder should be laterally adjusted to make the clearance (A) approximately twice as wider than the clearance (B). 3. The feed movement of the needle should be set, so that, with maximum stitch lengths, the needle leaves the throat plate close to the backward edge of the stitch hole. - Page 21 Fig. 1 – Loosen two screws (3) and the two screws (4). Displace the post bed feed (5) so that rule 2 is accomplished. – Set the maximum stitch length as described in chapter 2. – Set the needle to the position in which it leaves the throat plate insert.
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Page 22: Roller Foot
Roller foot Rule: 1. The location surface on the roller foot holder should be aligned in the right angle to the longitudinal axis of the machine. Between the roller foot and the wheel feeder should be a distance of (A) = 0,03 to 0,16 mm. 2. -
Page 23: Roller Foot Lifting
Roller foot lifting Rule: 1. The lifting of the roller foot via hand lever should be of 5.4 to 5.6 mm. 2. The lifting of the roller foot via electromagnet should be of 11.5 to 12.5 mm. 3. The lifting of the roller foot via knee lever should be of about 0.2 to 0.4 mm higher than the electromagnetic lifting (if existing). -
Page 24: Variator Of The Roller Foot Drive
Variator of the roller foot drive Rule: 1. With the correct position of the belt tensioner (1) the distance between the two cords of the V-belt should be (A) = 1 to 2 mm. 2. If the difference between upper and lower feed is set to zero on the setting nut (3), the graduation scale on the nut (4) should point exactly to “O”. -
Page 25: Hook Height
Setting of the needle bar and of the hook Hook height Rule: The distance A should be 1.0 up to 1.1 mm. – Loosen screws (1) and set the height (A) according to the rule. – Tighten the screws (1). Caution: Danger of injury ! Turn the main switch off. -
Page 26: Needle Bar Height, Play Of Needle To Hook Tip, Loop Stroke
Needle bar height, play of needle to hook tip, loop stroke Rule: When the handwheel pointer indicates “205” degrees (2.3 mm loop stroke), the hook tip should stand at the needle axis at the stitch length “0“. Length (A) = 1.5 mm, distance (B) = 0.02 to 0.1 mm. –... -
Page 27: Hook Tip Guard
Hook tip guard Rule: The guard plate of the hook (1) should prevent a contact between the needle and the hook tip (2). – Set the maximum stitch length according to the sewing equipment. – Dismount the throat plate. – Position the hook tip (2) on the needle and adjust the setting screw of the guard plate (1) by using an Allen key of 3 mm (3), so that the needle does not touch the hook tip (2). -
Page 28: Bobbin Housing Release
Bobbin housing release Rule: The distance measure (A) with max. release should be 0,5 mm. – Set the degree “310” on the scale of the handwheel. – Loosen screw (2) by the screwdriver (3), set the bobbin housing release (1) so that the distance measure (A) according to rule 2 is accomplished. -
Page 29: Hook Lubrication
Hook lubrication Rule: The screw (2) is to be unscrewed by 1.5 revolution from the position where the lubrication is fully closed. – Screw the choking screw (1) by means of a screwdriver (2) and loosen it back by 1.5 revolution according to the rule. –... -
Page 30: Thread Setting
Thread setting Thread regulator, check spring, bolt for the thread lever mechanism Rule: 1. The right edge of the thread regulator (1) should end at figure 2 on the scale. 2. The check spring (5) should be set to the distance measure of (A) = 15 mm. -
Page 31: Bobbin Winder
Bobbin winder Rule: 1. When the bobbin winder is switched off, the distance between bobbin winder wheel and belt pulley should be (A) = 0.8 mm. 2. The winding procedure should stop automatically, when the bobbin is filled up to 0.5 mm underneath the the bobbin edge. –... -
Page 32: Thread Cutter Thread-Pulling Knife Height
Thread cutter Thread-pulling knife height Rule: At the turning to its adjusting position the thread-pulling knife (1) should touch the counter knife (3) without pressure. – Slightly turn the thread-pulling knife (1) so that its locking screw (2) is accessible for the hexagonal key 2.5 mm (5). –... -
Page 33: Starting Position For The Thread Pulling Knife
Starting position of the thread-pulling knife Rule: If the thread-pulling knife (1) is locked in the starting position with a needle shank (2), the electric motor shock absorber (4) and the lever (3) should be positioned at the stop. – Dismantle the throat plate insert in the recess (6). -
Page 35: Angle Position (Timing) Of Control Cam And Clearance Between Cam And Roller
Angle position (timing) of control cam and clearance between cam and roller Rule: If the control cam (3) is locked with the pin (1) according to the picture: 1. On the hand wheel there should be the angle 100°. 2. Between the control cam (3) and the roller (4) there should be the distance (A) = 0,1 mm. -
Page 36: Bobbin Thread Clamp
Bobbin thread clamp Rule: The clamping force of the spring (1) should be high enough so as the tension needed to pull out the bottom thread is approximately the same as the tension needed to pull this thread from the hook bobbin. –... - Page 37 Electronic control and sewing machine drive - positioning motor All operating instructions and parameter sheets are available at the manufacturers´ websites (see www.efka.net, www.duerkopp-adler.com, www.hohsing.com, etc.). Selected instructions concerning the control and drive setting needed for the operators are included in the Operating instructions. Selected instructions needed for the technician to set the drive are included in the Operating instructions.
- Page 38 Terminals to PCB connections - electromagnetic variant Description of DA178-2 (9850 688001) switchboard connection X11 - main connection cable to control unit X12 - keypad (Taster) X13 - terminals for solenoid connection 1,2,3 – supply voltage +24V 4 - VR (backtacking) 5 - FL (foot lifting) 6 - FS (thread tensioner) 7 - STL OUT (half stitch)
- Page 39 Terminals to PCB connections - pneumatic variant Description of DA199_2 (9850 838000) switchboard X11 - 37-pole connector (to control box) X12 - thread tensioner valve X13 - secondary thread tensioner valve X14 - bartacking valve X15 - sewing foot valve X16 - keypad X17 - bobbin thread monitor X18 - light barrier...
- Page 40 DÜRKOPP ADLER GmbH Potsdamer Str. 190 33719 Bielefeld Germany Phone +49 (0) 521 925 00 E-Mail: service@duerkopp-adler.com www.duerkopp-adler.com...
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