User manual LERVIA KH 4000 AUTOMATIC FREE-ARM SEWING MACHINE

[. . . ] KH4000 Automatic Free-Arm Sewing Machine Operating instructions y q w er t u i o a s 2% 2$ 2# 2@ 2!f g j d h 2) ; l k Lervia KH 4000 Lervia Automatic Free-Arm Sewing Machine 1. Threading a) b) c) d) e) a) b) c) 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 Changing needles Changing the stitch plate Changing the snap-on foot Setting Setting Setting Setting Setting the the the the the upper thread tension lower thread tension presser foot pressure stitch width stitch length 4 4 4 4 5 6 6 7 7 8 11 12 12 11. Sewing a) b) c) d) e) f) g) h) i) j) k) l) m) n) o) p) q) r) s) t) u) v) w) a) b) c) d) e) f) To place the material To start a seam To finish off a seam Guiding the material Changing the sewing direction Selecting a stitch pattern Straight stitch Zigzag Stitch pattern table Blind hem Material-Thread-Needle Table Seam guide Overcast stitch Stretch seams Sewing buttonholes Buttonhole table Sewing on buttons "Edge-to-edge" sewing Decorative stitches Sewing a zipper Sewing with the twin needle Embroidery Thread cutter Clean the gripper area Clean the feeder Clean the casing Oil the gripper track What else needs oiling? [. . . ] · The lower thread tension is set correctly if the bobbin case l can be turned slowly and evenly ("fall down test"). l - 15 - Lervia KH 4000 c) Setting the presser foot pressure w Here you can set the pressure with which the material is pressed onto the stitch plate. · 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. · Turn the handwheel s in an anti-clockwise direction to fully raise the needle. y s · Select a stitch width from 0 - 5 on the selector wheel y. . . "0" straight "1" narrow "5" wide Important: When the twin needle is inserted, the selector wheel may not be set any higher than "3". A higher setting will cause the twin needle to break! d e) Setting the stitch length Here you can set how far the material is to be transported during sewing. This therefore determines the gap (length) between the stitch points. · Select the stitch length from 0 - 4 on the selector wheel d. . . "0" if the material should not be transported. "1" short "4" long - 16 - Lervia KH 4000 11. Sewing s If you have placed the thread and everything is set correctly, as described in the previous chapters: 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. " · Step very carefully on the foot switch ­ just enough to do the first 3-4 sewing motions. While doing this, guide the material with the right hand. · Once the first sewing motions have been performed successfully, hold the lever for backward operation 2# pressed briefly . . . · and press again on the foot switch ­ just until you have returned to the starting point of the seam. When you now want to continue with the seam from that point, it is held firmly by several overstitches. 2# c) To finish off a seam Sew back and forth at the end of the seam using the reverse lever, as at the start of the seam. The end of the seam is now also held firmly. - 17 - 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. · For stretchable materials, it can be necessary to guide the material in before and after the sewing foot to prevent it from pulling in. e) Changing the sewing direction You have arrived at a certain point, and you now want to continue sewing in a different direction. [. . . ] If you are unable to remedy the problem yourself, please contact the customer service department (see warranty card). 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. Fault / Problem: Check: Possible remedy: Machine is not sewing - is only the handwheel turning?Material is not being moved through Stitch length wheel set to "0"?Is the contact pressure of the sewing foot too low? [. . . ]