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Singer 7640 User Manual

Singer 7640
120 pages
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9
1
Needle and Presser Foot Area
ABOUT YOUR MACHINE
1. ONE STEP BUTTONHOLE LEVER automatically determines the length of the buttonhole when
lowered. (See Page 26)
2. NEEDLE THREADER LEVER is used to engage the automatic needle threader mechanism.
3. NEEDLE THREADER GUIDE holds thread securely before placing it in hook pin.
4. PRESSER BAR accommodates the presser foot holder.
5. PRESSER FOOT SCREW secures the presser foot holder (shank) onto the presser bar.
6. PRESSER FOOT holds fabric against the feed teeth while sewing. Various optional presser feet
are available, depending on fabric sewn and sewing techniques. (See Page 11)
7. FEED TEETH (OR FEED DOGS), which look like rows of teeth under the presser foot, control the
movement of the fabric under the presser foot.
8. NEEDLE PLATE covers the bobbin area and provides Àat area around presser foot for sewing.
9. THREAD GUIDE controls movement of upper thread.
10. NEEDLE CLAMP SCREW secures the needle when placed in needle clamp.
11. NEEDLE CLAMP holds the machine’s needle in position.
12. NEEDLE holds thread during stitch formation.
13. LOCK IN PLACE BUTTON helps with even feeding over extra thick seams.
14. PRESSER FOOT HOLDER (OR SHANK) holds presser foot.
15. STITCHING GUIDELINES are used as a visual reference for guiding fabric straight while sewing.
The ¿rst line is 3/8” (10mm) from center needle position. The most popular seam allowance
measurements are 1/2” (13mm) and 5/8” (16mm). The 1/2” seam allowance is the 2nd line, and
the 5/8” seam allowance is the 3rd line from center needle position.

Table of Contents

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Singer 7640 Specifications

General IconGeneral
Buttonhole Styles6
Automatic Needle ThreaderYes
Stitch Width7mm
Stitch Length5mm
Speed ControlYes
Start/Stop ButtonYes
Needle Positions13
Twin Needle CapabilityYes
LCD ScreenYes
TypeComputerized
Bobbin TypeTop Drop-In
Stitch OptionsAdjustable Stitch Length and Width
Drop FeedYes
Presser Feet IncludedAll-Purpose Foot, Zipper Foot, Buttonhole Foot, Satin Stitch Foot, Blind Hem Foot, Button Sewing Foot

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