Duerkopp Adler 550-16-23 Service Instructions Manual
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Also See for 550-16-23:
- Parts list (46 pages) ,
- Operating instructions manual (26 pages) ,
- Installation instructions manual (8 pages)
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Contents
Part 3: Servicing Instructions 550-16-23 and 550-16-26
1.
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1
Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
Description of the integral adjustment disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3
Position of the integral adjustment disc with respect to the arm-shaft crank . . . . . . . . . . .
2.
Upper/lower synchronous-belt shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
Position of the synchronous-belt pulley on the lower shaft . . . . . . . . . . . . . . . . . . . . . .
2.2
Upper/lower shaft synchronous-belt tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Needle-bar height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Shuttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
Aligning the shuttle shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
Changing the shuttle-drive synchronous belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3
Loop stroke and gap between shuttle tip and needle . . . . . . . . . . . . . . . . . . . . . . . . .
4.4
Bobbin-housing holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
Material feed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2
Underfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Replacing the feed belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3 Feed-belt tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.4 Replacing the drive belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3
Overfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 Feed belts: overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Changing the feed belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Tensioning the feed belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.4 Drive-shaft play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.5 Changing the synchronous belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
Sewing foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1
Height of the presser bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2
Sewing-foot lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3
Sewing-foot pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4
Adjusting the sewing-foot stroke height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.2 Stroke timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.3 Stroke height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.
Thread cutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2
Control cam for blade-movement timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Summary of Contents for Duerkopp Adler 550-16-23
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Page 1: Table Of Contents
Contents page: Part 3: Servicing Instructions 550-16-23 and 550-16-26 General ........... . Gauges . - Page 2 Contents page: Cutter-blade position ..........Counter-blade cut pressure .
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Page 3: General
General These Servicing Instructions describe the adjustment of the 550-16-23 and 550-16-26functional sewing units. CAUTION: The activities described in these Servicing Instructions may only be carried out by specialist personnel or other appropriately trained persons. Caution: danger of injury Before all repair, conversion and maintenance work turn off the main switch and isolate the machine from the pneumatic supply. -
Page 4: Gauges
1.1 Gauges The machine can be precisely adjusted and checked with the gauges listed below. The locking pin 1, which can be found in the machine’s accessory pack, is used to lock the arm shaft in the various positions required for adjustment. -
Page 5: Description Of The Integral Adjustment Disc
1.2 Description of the integral adjusting disc The machine can be locked in all adjustment positions using locking pin 2 and the adjustment disc 3 integral to the synchronous-belt pulley on the arm shaft. There are 6 notches on the adjustment disc. These are marked A, B, C, D, E and F on the hand-wheel 1. -
Page 6: Position Of The Integral Adjustment Disc With Respect To The Arm-Shaft Crank
1.3 Position of the integral adjustment disc with respect to the arm shaft CAUTION: Adjustments carried out with the adjusting disc will only be correct if the disc itself has been adjusted as described below. If the arm shaft is moved, all subsequent settings must be checked and adjusted if necessary. -
Page 7: Upper/Lower Synchronous-Belt Shafts
Upper/lower synchronous-belt shafts 2.1 Position of the synchronous-belt pulley on the lower shaft Caution: danger of injury Turn off the main switch. The position of the lower belt pulley may only be inspected and adjusted with the machine switched off. Regulation and inspection The first screw of the belt pulley 2 must bite on the flat area of the lower shaft 1. -
Page 8: Upper/Lower Shaft Synchronous-Belt Tension
2.2 Upper/lower shaft synchronous-belt tension Regulation and inspection The tension in the belt should be such as to produce an exact transmission between the upper and lower shafts. Excessive belt tension may lead to disproportionate wear and noise. Caution: danger of injury Turn off the main switch. -
Page 9: Needle-Bar Height
Needle-bar height Caution: danger of injury Turn off the main switch. The needle-bar height may only be checked and adjusted with the machine switched off. Regulation and inspection In the loop-stroke position (adjustment position A) the shuttle tip 7 must be at the centre of the needle 8 and 3 mm above the upper edge 6 of the eye of the needle. -
Page 10: Shuttle
Shuttle 4.1 Aligning the shuttle shaft Caution: danger of injury Turn off the main switch. The shuttle shaft may only be adjusted with the machine switched off. Regulation and inspection The shuttle shaft 1 is factory-aligned. When it is correctly aligned the shuttle 3 is equidistant from the shuttle-drive housing 2 at every point. - Page 11 – Undo screw 7. – Remove the left and right casings 6 and 8. – Remove screws 10 and 12. – Remove the centre-holder 11 and needle plate 9. – Undo the shuttle screw 14 and extract the shuttle from the drive housing.
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Page 12: Changing The Shuttle-Drive Synchronous Belt
4.2 Changing the shuttle-drive synchronous belt Caution: danger of injury Switch the machine off. The belt may only be changed with the machine switched off. Changing the belt – Remove screws 1 and 2 and cover 3. – Undo screw 5 on the sprocket 4. –... -
Page 13: Loop Stroke And Gap Between Shuttle Tip And Needle
4.3 Loop stroke and gap between shuttle tip and needle Regulation and inspection The loop stroke is the path taken by the needle bar from bottom dead centre to the point at which the shuttle tip is at the centre of the needle. The loop stroke is 1.8 mm long. -
Page 14: Bobbin-Housing Holder
4.4 Bobbin-housing holder Caution: danger of injury Turn off the main switch. The bobbin-housing holder may only be adjusted with the machine switched off. Regulation and inspection The gap between the bobbin-housing holder 1 and the centre of the shuttle 2 must be at least equal to the thickness of the yarn so that the yarn can pass freely through it. -
Page 15: Material Feed
Material feed 5.1 General The upper and lower belt feeds are driven by two separate step motors. Step motor 1 for the lower belt feed is connected to the drive transmission with a slip clutch. Step motor 2 for the upper belt feed is directly connected to the feed belts. -
Page 17: Underfeed
5.2 Underfeed 5.2.1 Changing the feed belts Caution: danger of injury Turn off the main switch. The feed belts may only be changed with the machine switched off. Changing the feed belts – Undo screw 2. – Pivot tension rollers 1 and 3 from the feed belts. –... -
Page 18: Feed-Belt Tension
5.2.3 Feed-belt tension Regulation and inspection The feed-belt tension should be such that the step length is exactly transmitted. Excessive feed-belt tension can produce disproportionate wear and functional tension. Caution: danger of injury Turn off the main switch. The feed-belt tension may only be adjusted with the machine switched off. -
Page 19: Replacing The Drive Belt
5.2.4 Changing the drive belt Caution: danger of injury Turn off the main switch. The drive belt may only be changed with the machine switched off. Releasing the feed-belt tension – Undo screw 2 and move tension rollers 1 and 3 away from the feed belts 4. - Page 20 15 14 13 12 Changing the belt – Undo screw 11 on the slip clutch. – Undo screw 14 and remove the setting ring 15. – Undo screw 13 on the inner setting ring. The screw is in contact with the flat area. Loosen the screw until the setting ring can be pushed over the shaft.
- Page 21 Fitting the drive unit – Replace the bearing block 7 with the shaft 8 and fit the feed belts. – Screw the bearing block tight with screws 5 and 6. Adjusting the synchronous-belt tension – Undo screws 5 and 6. –...
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Page 22: Overfeed
5.3 Overfeed 5.3.1 Feed belts: overview... -
Page 23: Changing The Feed Belts
5.3.2 Changing the feed belts Caution: danger of injury Turn off the main switch. The feed belts may only be changed with the machine switched off. Remove the sewing foot with feed belts. – Raise the sewing foot and lock it in the up position with press-button 1. - Page 24 Removing the feed belts at the sewing foot – Undo screw 13. – Pull off the right-hand side 12 of the sewing foot. – Remove the link plate 14. – Remove belts 15 and 16. Fit the feed belts to the sewing foot The narrower belt must be mounted on the right of the sewing foot.
- Page 25 Fitting the sewing foot with feed belts – Place the feed belts on the drive pulleys 9. – Place the feed belts 15 and 16 on the sewing-foot rollers, mount the sewing foot on the presser bar and secure with screw 4. –...
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Page 26: Tensioning The Feed Belts
5.3.3 Feed-belt tension Caution: danger of injury Turn off the main switch. The upper feed belts may only be tensioned with the machine switched off. Adjustment The tension in the two feed belts must be such as to ensure that stitch lengths are transmitted exactly. -
Page 27: Drive-Shaft Play
5.3.4 Drive-shaft play Regulation and inspection To avoid friction losses in the upper-belt-feed drive there should be minimum play between the feed pulleys 1 and the bushing 2. There must be a perceptible gap at the sides of the drive shaft 4. Caution: danger of injury Turn off the main switch. -
Page 28: Changing The Synchronous Belt
5.3.5 Changing the synchronous belt Caution: danger of injury Turn off the main switch. The synchronous belt may only be changed with the machine switched off. – Undo screws 2 and 3 and the cover 4. – Undo the four screws 6 and remove the motor 7 with sprocket 9 and cover plate 5. -
Page 29: Sewing Foot
Sewing foot 6.1 Presser bar height Caution: danger of injury Turn off the main switch. The height of the presser bar may only be adjusted with the machine switched off. Regulation and inspection When the sewing foot is in contact with the lower feed belts there should be a gap of 0.5 - 1.0 mm between the presser block 2 and the lifting cylinder 1. -
Page 30: Sewing-Foot Lift
6.2 Sewing-foot lift There is clearance of 8 mm under the sewing foot when it is raised. Clearance is fixed: it cannot be altered. CAUTION: DANGER OF BREAKAGE The knurled-head screw 1 for the sewing-foot stroke height must always be fully screwed in. -
Page 31: Sewing-Foot Pressure
6.3 Sewing-foot pressure Regulation and inspection The sewing-foot pressure must be such that the fabric is neither loose nor compressed. Do not apply more pressure than is necessary. Adjustment – Undo locknut 2. – Adjust the sewing-foot pressure by turning screw 1: clockwise to increase pressure anticlockwise to reduce it. -
Page 32: Adjusting The Sewing-Foot Stroke Height
6.4 Adjusting the sewing-foot stroke height 6.4.1 General Adjusting the sewing-foot stroke height makes it easier to turn the fabric for rounded seams. The fabric is released by briefly raising the sewing foot with the needle down. The stroke movement of the sewing foot originates from eccentric 4 on the arm shaft and is transmitted to the presser bar by a cable 2. -
Page 33: Stroke Height
6.4.3 Stroke height Caution: danger of injury Turn off the main switch. The sewing-foot stroke height may only be adjusted with the machine switched off. Regulation and inspection With the adjustment wheel 4 in position “0" the sewing foot must not be raised. -
Page 34: Thread Cutter
Thread cutter 7.1 General The control cam 2 determines the motion of the thread cutter and the timing of the blade movement. This ensures that the timing coincides with the movements of the stitch-forming components. The thread cutter is operated electro-pneumatically. -
Page 35: Control Cam For Blade-Movement Timing
7.2 Control cam for blade-movement timing Regulation and inspection Before the thread cutter functions there must be a gap of 0.2 to 0.3 mm between the external diameter of the control cam 2 and roller 1. With the machine locked in position C the control cam must be in the position shown at left. -
Page 36: Cutter-Blade Position
7.3 Cutter-blade position Caution: danger of injury Turn off the main switch. The position of the cutter blades may only be checked and adjusted with the machine switched off. Regulation and inspection When the thread cutter system is in its normal position, the thread puller blade 5 should overlap the counter-blade 4 by 1 mm. -
Page 37: Counter-Blade Cut Pressure
7.4 Counter-blade cut pressure Caution: danger of injury Turn off the main switch. The counter-blade cut pressure may only be checked and adjusted with the machine switched off. Regulation and inspection The needle and shuttle threads must be severed with the minimum possible pressure. -
Page 38: Thread-Guiding Components
Thread-guiding components 8.1 Needle-thread tension release Caution: danger of injury Turn off the main switch. The needle-thread tension release may only be adjusted with the machine switched off. Regulation and inspection Press on the axle of the needle-thread tensioner to open it by about 1 mm. -
Page 39: Thread-Tensioning Spring
8.2 Thread-tensioning spring Regulation and inspection The thread-tensioning spring 1 must keep the needle thread under tension at least until the needle tip has penetrated the fabric. Caution: danger of injury Turn off the main switch. The thread-tensioning spring may only be adjusted with the machine switched off. -
Page 40: Bobbin Winder
8.3 Bobbin winder Regulation and inspection The bobbin winder must turn off automatically when the bobbin is fully wound to a point 0.5 mm below the rim. Caution: danger of injury Turn off the main switch. The bobbin winder may only be adjusted with the sewing machine switched off. -
Page 41: Proximity Switch
Proximity switch Regulation and inspection After the thread is cut the machine must halt in position C of the adjustment disc. The gap between the proximity switch 3 and the trip cam 4 must be about 0.5 to 1.0 mm. Caution: danger of injury Turn off the main switch. -
Page 42: Lubrication
10. Lubrication Regulation and inspection The oil level must not fall below the “Minimum” mark. Caution: danger of injury Turn off the main switch. Work on the lubrication system may only be carried out with the machine switched off. Oil can cause skin eruptions. Avoid protracted contact with the skin. -
Page 43: Oil Circulation
10.1 Oil circulation The oil passes from the oil reservoir 1 to the sump 4, from where the lubrication points in the arm and sewing-head regions are supplied. The oil thrown off by the crank mechanism passes back to the sump 4 along the wick 3. -
Page 44: Maintenance
11. Maintenance Caution: danger of injury Turn off the main switch. Maintenance work on the sewing unit may only be carried out when it is switched off. The maintenance work to be carried out daily or weekly by the machine operators (cleaning and lubrication) is described in the operating instructions (part 1).
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