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Alfa 3050 Manuel D'instructions page 5

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KNOW YOUR MACHINE
Name of Parts ........................................................... 4
Standard Accessories ............................................... 6
Extension table .......................................................... 6
GETTING READY TO SEW
Connecting the Power Supply .................................. 8
Controlling Sewing Speed ........................................ 8
Speed control slider ................................................ 8
Foot control ............................................................. 8
Function Buttons and Keys ..................................... 10
Reverse button ..................................................... 10
Auto-Lock button ................................................... 10
Up/Down needle button ........................................ 10
Mode key .............................................................. 12
Direct pattern selection ......................................... 12
Dropping the Feed Dog .......................................... 14
Changing the Presser Foot ..................................... 14
Detaching and Attaching the Foot Holder ............... 14
Raising and Lowering the Presser Foot ................. 16
Balancing Thread Tension ...................................... 16
Auto tension .......................................................... 16
Manual tension adjustment ................................... 16
Changing Needles .................................................. 18
Winding the Bobbin ................................................. 20
Removing the bobbin ............................................ 20
Setting the spool of thread .................................... 20
Additional spool pin ............................................... 20
Threading for bobbin winding ............................... 20
Inserting the bobbin .............................................. 22
Threading the Machine ........................................... 24
Built-in Needle Threader ......................................... 26
Drawing Up the Bobbin Thread .............................. 26
BASIC STITCHES
Straight Stitch ......................................................... 28
To sew ................................................................... 28
Changing sewing direction ................................... 28
Securing a seam ................................................... 28
Altering the stitch length ....................................... 30
Altering the needle drop position .......................... 30
Using the seam guide lines .................................. 32
To sew from the edge of thick fabric ..................... 32
Variety of Straight Stitches and
Recommended Feet ............................................... 34
Zigzag Stitch ........................................................... 36
Altering the stitch width ......................................... 36
Altering the stitch length ....................................... 36
Variety of Overcasting Stitches ............................... 38
Overcasting with zigzag stitch .............................. 38
Multiple zigzag stitch (Tricot stitch) ....................... 38
Overcasting stitch ................................................. 38
Double overedge stitch ......................................... 40
Buttonholes ............................................................. 42
Variety of buttonholes ............................................. 42
Square buttonhole .................................................. 42
To sew ................................................................... 44
Altering the buttonhole width ................................ 48
Altering buttonhole stitch density .......................... 48
Double layer buttonhole .......................................... 48
Round end and keyhole buttonholes ...................... 50
Altering the buttonhole width ................................ 50
TABLE OF CONTENTS
Corded buttonhole ................................................. 52
Button Sewing ........................................................ 54
Darning .................................................................. 56
To sew a shorter darning ..................................... 56
To adjust the evenness of darning ....................... 56
Zipper Sewing ........................................................ 58
Attaching the zipper foot ...................................... 58
Fabric preparation for zipper sewing .................... 58
To sew .................................................................. 58
Blind Hem ............................................................... 62
DECORATIVE STITCHES
Knit stitch ................................................................ 64
Shell Tucking .......................................................... 64
Satin Stitches ......................................................... 64
Applique Sewing .................................................... 66
Scallop Stitch ......................................................... 66
Patchwork .............................................................. 66
Smocking ............................................................... 68
Fagoting ................................................................. 68
Cross Stitch ............................................................ 68
Pattern Combination .............................................. 70
Correcting Distorted Stretch Patterns .................... 72
CARE AND MAINTENANCE
Replacing the Light Bulb ........................................ 72
Cleaning the Hook Race ........................................ 74
Inserting the bobbin holder ..................................... 74
Problems and Warning Signals .............................. 76
Troubleshooting ..................................................... 79
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