KH4000 Automatic Free-Arm Sewing Machine Operating instructions
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Lervia KH 4000 Lervia Automatic Free-Arm Sewing Machine 1. Intended Use 4 2. Technical data 4 3. Package contents 4 4. Operating elements 4 5. Safety instructions 5 6. Setting up 6 7. Switching On / Off 6 8. Threading 7 a) b) c) d) e) Threading the lower bobbin Threading the lower thread Threading the upper thread Retrieving the lower thread Threading with 2 needles 9. Attaching accessories a) b) c) Changing needles Changing the stitch plate Changing the snap-on foot 10.
Lervia KH 4000 Operating instructions Lervia Automatic Free-Arm Sewing Machine 3. Package contents (see front fold-out page) ● 1 sewing machine 1. Intended Use The sewing machine is intended ... - for use as a movable machine, - for sewing of typical household textiles and ... - only for private household use. The sewing machine is not intended ... - to be installed at a fixed location, - for processing of other materials (e.g.
Lervia KH 4000 5. Safety instructions Warning against injuries and material damages: Like any other electrical device, a sewing machine can cause serious, even life-threatening injuries. To avoid this, and in order to work safely: According to legislation, you as the user of an electrical appliance are responsible for preventing possible accidents through safetyconscious behaviour: • Before initial use of your sewing machine, read these operating instructions thoroughly.
Lervia KH 4000 6. Setting up • Place the sewing machine on a stabile table. • Plug the foot switch into the connection socket g of the machine and ... • insert the plug into the wall socket. If the worktop is not completely even, you can compensate for slight unevenness as follows: • Pull the box compartment 2@ off to the side, it is only slid on, not firmly attached. • You can turn the adjusting foot 1& that becomes visible underneath in order to make the sewing machine rest properly.
Lervia KH 4000 8. Threading Warning: Make sure that the sewing mahine is switched off and the plug has been pulled out of the socket when threading in order to avoid injury if the sewing machine should be accidentally switched on. i t a) Threading the lower bobbin To load the lower bobbin with thread: • Pull out one of the two thread spool carriers i on top and place a spool of thread there. • You can place a felt pad underneath the spool of thread , so that the bobbin runs evenly.
Lervia KH 4000 b) Threading the lower thread Turn the handwheel s in an anti-clockwise direction to fully raise the needle. • Pull the box compartment 2@ off to the side, it is only slid on, not firmly attached. • Then open the gripper flap “ situated behind it. “ 2@ 18a • Fold out the folding lever case l ... 18a of the bobbin 1* • and pull out the bobbin case l as shown.
Lervia KH 4000 1* • Unwind approximately 10 cm of thread from the spool and slide this into the bobbin case l so that the spool unwinds anti-clockwise. 18c • Pull the unwound end of the thread through the gap 18b in the side wall of the bobbin case ... • under the tension spring 18c , 18b 18d • until the thread comes out the slit the bobbin case. 18d in For optimal setting of the lower thread tension, see Chapter 10.
Lervia KH 4000 • Put the bobbin case l back on the pin and ... 1* ” • turn the bobbin case l until the driver catches in the notch. 18e 18e • Lay the excess thread such that it does not bind anywhere ... • then close the gripper flap ”. • You can simply slide the box compartment 2@ back on – for instance if you need this as an "extension table" for sewing large material. You can also leave the box compartment off, for example for free-arm sewing of arms, trouser legs, etc.
Lervia KH 4000 t e i 2$ s ; r 19a 19b j c) Threading the upper thread • You can place a felt pad underneath the spool of thread, so that the bobbin runs evenly. To pass in the upper thread, it is not necessary to open the front of the sewing machine. The illustration is for guidance only. Before you begin threading, turn the handwheel s anti-clockwise to position the threading hook e in the uppermost position. Use the foot lever j to raise the needle retainer ; .
Lervia KH 4000 d) Retrieving the lower thread • Turn the handwheel s in an anti-clockwise direction to fully raise the needle. • Use the foot lever j to raise the needle retainer ; . • With the left hand, firmly hold the end of the upper thread that comes through the eye of the needle. • Then use your right hand to turn the handwheel s one full turn anti-clockwise. • The upper thread now pulls up the lower thread in a loop ”.
Lervia KH 4000 9. Attaching accessories Warning: Make sure that the sewing machine is switched off and the plug has been pulled out of the sokket to prevent accidents caused by un-intentional switching on. a) Changing needles • Turn the handwheel s in an anti-clockwise direction to fully raise the needle. 20a • Loosen the clamping screw old needle out. 20a and pull the • Insert the new needle, with the flat side toward the back.
Lervia KH 4000 c) Changing the snap-on foot With the sewing machine you are provided with four snap-on-feet, which you can simply use as required: blind hem foot zipper foot buttonhole foot button foot To change the snap-on foot: • Turn the handwheel s in an anti-clockwise direction to fully raise the needle. • Position the foot lever j in the upward position in order to lift the needle retainer ; up. ; • Press the lever 19d upward.
Lervia KH 4000 10. Settings The tension of the upper and lower thread is set correctly if the twining of the two threads cannot be seen on the top or bottom sides of the material after sewing. If even one of the two tensions is not set correctly, an unclean seam will result. The stitches will then lie flat on the material. r a) Setting the upper thread tension • You can select the strength of the upper thread tension by turning the selector wheel for the upper thread tension r. If this thread is ...
Lervia KH 4000 c) Setting the presser foot pressure Here you can set the pressure with which the material is pressed onto the stitch plate. w • Now set the contact pressure on the selector wheel w. "0" if no pressure is to be applied, for example for darning with free-hand stitches "1" for light fabrics (curtains) "2" for average fabrics (normal) "3" for heavy fabrics (jeans). d) Setting the stitch width Here you can set the width of seam for zigzag patterns.
Lervia KH 4000 11. Sewing If you have placed the thread and everything is set correctly, as described in the previous chapters: s a) To place the material j • Turn the handwheel s in an anti-clockwise direction to fully raise the needle. • Use the foot lever j to raise the needle retainer ;. ; • Place the material under the sewing foot and lower the sewing foot back down. b) To start a seam • Hold the two thread ends run to the back ” firmly with the left hand.
Lervia KH 4000 d) Guiding the material • Only guide normal materials as shown in the diagram. Avoid pulling it, as this can cause the needle to bend or break. • Very fine materials pull inward slightly during sewing. To prevent this, lay a thin paper under the material and sew this in with the material. When you have finished sewing, carefully pull the paper away from the material; the result is a very clean stitch.
Lervia KH 4000 f) Selecting a stitch pattern y To select a particular pattern, take the following steps: • Select the stitch pattern with the stitch pattern selector h. • Select the stitch length by means of the d selector wheel. h • Select the stitch width by means of the selector wheel y. • Attach the respective snap-on foot, as described in Chapter 9. d You can find the required settings in the table on the next page. If two values are set for the stitch length, these are understood as "from ...
Lervia KH 4000 i) Stitch pattern table Stitch pattern Stitch length Sewing foot Stitch width A Straight stitch B-E Zigzag 1-5 F Blind stitch 3-5 G Blind hem H Three-step zigzag stitch 3-5 I Slant over edge stitch 3-5 J Single overlock stitch 3-5 K Honeycomb stitch 3-5 L 3-fold zigzag M Stretch straight stitch 0 N Shell stitch 3-5 O Honeycomb stitch 3-5 p 3-edged block stitch 3-5 q Semi-circular stitch 3-5 R-T Buttonhole Free-hand embroidery Without
Lervia KH 4000 j) Blind hem • Fold the material as shown. Make the fold as wide as you want the finished seam to be: The lower fold should be inset by about 5 mm. • Use the blind hem foot . While sewing, check the hem width and needle position to be sure the hem is even. • Sew the blind hem on the underside of the material, so that only the peak of the zigzag stitch pierces the top part of the material. When you have finished sewing, push the left of the material over to the right and smooth out.
Lervia KH 4000 k) Material-Thread-Needle Table Please refer to the details for the various materials. Material Thread Needle Presser foot pressure See p. 16 Stitch length Straight stitch ZZ Stitch length selection Light Middle Heavy Nylon Cotton 80 Cotton jersey Man-made fibre 60 Silk Silk 50 Woll-silk Man-made fibre 50 silk 80 (12) Poplin Cotton 60-80 80-90 (12-14) Fine Jersey Man-made fibre 60 70 (10) 1 1-3 1-4 2 0.5-3 0.5-4 3 0.5-3 0.
Lervia KH 4000 l) Seam guide • Use the seam guide for sewing longer hems or seams that should have an even distance to the edge of the material. 2! • Screw the seam guide into the threaded hole on the right of the stitch plate 2!. Set the desired seam width, then tighten the knurled screw. • While sewing, the edge of the material must touch the seam guide. The seam guide can also be screwed in obliquely for sewing corners.
Lervia KH 4000 o) Sewing buttonholes • Attach the buttonhole foot , as described in Chapter 9. • Refer to the table for: - the required stitch length - the required stitch pattern - the required method for sewing. • When finished, you can cut the buttonhole in the middle, as shown. p) Buttonhole table Pattern selector (Stitch pattern) Sewing Method Settings/stitch length R 1. Set selector to "R" 2. Sew the left side 3. Raise needle S 4. Set selector to "S" 5. Sew 5-6 stitches 6.
Lervia KH 4000 q) Sewing on buttons • Attach the button foot and ... • place the darning plate on the existing zigzag stitch plate, as described in Chapter 9. • Lay the button between the button foot and the material and lower the button foot down. • Turn the handwheel s anti-clockwise. Check whether the needle passes cleanly through both button holes. • Adjust the stitch width of the zigzag mode as necessary.
Lervia KH 4000 t) Sewing a zipper Using the zipper foot you can sew along the right and left-hand edges of the zipper without damaging the zipper or the needle. The zipper foot is also useful for sewing edges or parallel seams. • Attach the zipper foot , as described in Chapter 9. • Then select the straight stitch (A) as stitch pattern. • Fold over approximately 2 cm of material and lay the zipper under the material fold such that the links just protrude.
Lervia KH 4000 u) Sewing with the twin needle • Insert the twin needle with the flat side toward the back. • Thread the thread as for normal sewing. Both threads are threaded together through the guides – up to the twin needle. • Only there are the two upper threads threaded separately. • Make certain that the setting for the stitch width is not greater than "3" – otherwise, the needle will break off.
Lervia KH 4000 12. Care After each use, remove any pieces of thread, material, and fluff. Only in this way will you ensure that the sewing machine continues to work correctly and lasts for a long time. Warning: Make sure that the sewing machine is switched off and the plug has been pulled out of the socket to prevent accidents caused by unintentional switching on.
Lervia KH 4000 c) Clean the casing Danger!: Never open any parts of the machine casing other than those described in this manual. There are no operating elements inside. Otherwise there is a risk of injury and potentially life-threatening accidents. ” • Clean all plastic surfaces with a soft, dry- cloth. • Do not use cleansers or abrasive materials – the casing could be scratched. • The parts of the appliance may never be submerged in water or other liquids! This could damage the appliance.
Lervia KH 4000 13. Troubleshooting f) Storing Keep the sewing machine ... - at a dry location so that no rust forms on the metal mechanical parts, - always under the supplied covers to prevent dust from entering the sewing machine, - outside the reach of small children or elderly persons, so that they cannot endanger themselves through unsupervised operation. Fault / Problem: Material is not being moved through If something is not working, you can use the table below to try and correct the fault.
Lervia KH 4000 The bulb no longer lights? If the bulb is burned out, replace it with an identical one purchsed from a specialised dealer. The designation is "15W - E14". • Use the supplied screwdriver to loosen the screw on the front side of the front cover q. • Take off the front cover q . • Unscrew the defective bulb 2% and screw a new one into the socket. 2% q 14. Warranty and service The warranty conditions and the service address can be found on the warranty slip. 15.
Lervia KH 4000 - 32 -
ID Nr.: KH4000-05/05-V4 Kompernaß GmbH Burgstrasse 21 · D-44867 Bochum www.kompernass.
