Singer Heavy Duty Sewing Machine 6600 Manual

The Singer Heavy Duty 6600 is a robust sewing machine designed for demanding projects, featuring a powerful motor, 110 built-in stitches, automatic needle threader, top drop-in bobbin, adjustable presser foot pressure, and a heavy-duty metal frame. It supports a wide range of fabrics from delicate silks to heavy denim and leather. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Unpacking and Setup 3. First-Time Operation 4. Specifications 5. Controls and Functions 6. Stitch Selection and Settings 8. Threading and Bobbin Winding 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Heavy-duty metal frame, Automatic needle threader, Top drop-in bobbin system, LED lighting, 110 built-in stitches, Adjustable stitch length and width, Automatic tension control, Free arm capability.

Feature	Description
Motor	High-speed, powerful motor for heavy fabrics
Stitches	110 built-in stitches including utility, decorative, and stretch
Needle Threader	Automatic, one-step needle threading
Bobbin System	Top drop-in, jam-resistant bobbin
Presser Foot Pressure	Adjustable for different fabric thicknesses
Feed Dogs	Drop feed dogs for free-motion sewing
Speed Control	Adjustable sewing speed with slider
Buttonholes	One-step automatic buttonhole
Needle Position	Automatic needle up/down
Accessories	Includes various presser feet, needles, bobbins, seam ripper, and lint brush

Unpacking and Setup

Unpack and inspect all contents. Place on stable, level surface.

Remove machine from packaging: Lift machine by its carrying handle.
Attach power cord: Plug into machine and then into 120V AC outlet.
Install foot controller: Connect to machine port.
Attach accessory tray: Slide onto free arm if included.
Insert needle: Ensure flat side faces back, tighten screw securely.

WARNING! Machine is heavy; use proper lifting technique. Ensure work area is clean and well-lit.

First-Time Operation

Power on machine; familiarize yourself with controls.

Thread the machine: Follow numbered guides; use automatic needle threader.
Wind bobbin: Place thread on spool pin, wind bobbin using bobbin winding function.
Insert bobbin: Drop bobbin into case with thread rotating clockwise.
Select stitch: Use stitch selection dial or buttons.
Test sew: Use scrap fabric to adjust tension and stitch settings.

CAUTION! Keep fingers away from needle during operation. Always turn off power when threading or changing needle.

Specifications

Model: Singer Heavy Duty 6600
Stitches: 110 built-in stitches
Speed: Up to 1100 stitches per minute
Needle Positions: Left, center, right
Presser Feet: Includes all-purpose zipper, buttonhole, blind hem, overcasting foot
Bobbin: Class 15 transparent bobbin
Lighting: LED bulb for bright work area
Power Source: 120V AC, 60Hz
Warranty: 25-year limited warranty

Controls and Functions

Access controls via front panel and LCD display. Front Panel: Power switch, Stitch selection buttons, Stitch length/width adjustment, Reverse stitch button, Needle up/down button.

LCD Display: Shows selected stitch number, length, width, and recommended foot.

Stitch Settings: Length (0-4 mm), Width (0-7 mm). Tension: Automatic, with manual override (0-9). Special Functions: Mirror imaging, stitch elongation, memory function for stitch patterns.

Stitch Selection and Settings

Select from 110 stitches including straight, zigzag, stretch, decorative, and buttonholes.

Turn stitch selection dial or press buttons to choose stitch.
Adjust stitch length: Higher numbers for longer stitches.
Adjust stitch width: For zigzag and decorative stitches.
Refer to stitch chart for recommended settings and presser foot.
For buttonholes: Use one-step buttonhole function; practice on scrap fabric first.

Tip: Always test stitch on fabric scrap to check tension and appearance.

Threading and Bobbin Winding

Proper threading is essential for smooth operation.

Raise presser foot and needle to highest position.
Place thread spool on spool pin.
Follow threading guides marked on machine.
Use automatic needle threader: Lower lever, hook thread, release lever.
Wind bobbin: Place empty bobbin on winder, engage bobbin winding mechanism, press foot controller.
Insert bobbin: Ensure thread pulls clockwise when gently tugged.

WARNING! Ensure machine is off during threading. Use correct bobbin type (Class 15).

Maintenance & Cleaning

Unplug machine before cleaning. Regular maintenance ensures optimal performance.

Remove needle plate: Use screwdriver to access bobbin area.
Clean lint and dust: Use small brush or vacuum attachment.
Oil machine: Apply drop of sewing machine oil to hook race and other moving parts as per manual.
Wipe exterior: Use soft, dry cloth.

CAUTION! Do not use compressed air; it can force lint deeper. Never spray lubricants directly.

Regulatory Information

UL Listed: Complies with safety standards. FCC Part 15: Class B digital device; may not cause harmful interference. Copyright © Singer Manufacturing Company. For support, visit www.singer.com or contact 1-800-4-SINGER.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Thread bunching underneath	Incorrect threading or tension	Re-thread top and bobbin; check bobbin insertion; adjust tension.
Needle breaks	Wrong needle type, bent needle, incorrect insertion	Replace with correct needle (e.g., denim for heavy fabric); ensure needle is fully up and tight.
Machine skips stitches	Dull/bent needle, wrong needle size, incorrect threading	Change needle; re-thread; ensure proper needle for fabric.
Machine does not run	Power connection, foot controller	Check power cord and outlet; ensure foot controller is plugged in fully.
Uneven stitches	Dirty feed dogs, incorrect tension	Clean feed dogs; adjust upper thread tension.
Bobbin thread not picking up	Timing issue, threading error	Re-thread completely; consult authorized service if timing is suspected.

Reset: Turn machine off and on to reset electronic settings.

Service: 1-800-4-SINGER; www.singer.com for authorized service centers.