Singer Heavy Duty 6600C Manual

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

Features at a Glance

Key components: Heavy-duty metal frame, powerful motor, stitch selection dial, automatic needle threader, drop-in bobbin system, built-in LED light, and accessory storage.

Unpacking & Setup

Carefully unpack all components and place the machine on a stable, flat surface.

1. Remove all packaging materials from the machine and accessories.
2. Place the machine on a sturdy table or sewing cabinet.
3. Connect the foot control pedal to the machine port.
4. Plug the power cord into the machine and then into a standard 120V AC outlet.
5. Install the needle and thread the machine (see First-Time Use).

WARNING! The machine is heavy; lift with your legs, not your back. Ensure the work area is well-lit and free of obstructions.

First-Time Use

Prepare your machine for its first stitch.

1. Raise the presser foot and insert a new needle (flat side to the back). Tighten the screw.
2. Use the automatic needle threader: Lower the lever, place thread in hook, and raise lever.
3. Wind the bobbin: Place thread on spool pin, guide through tension disc, and wind onto bobbin.
4. Insert the bobbin into the drop-in case (counterclockwise direction).
5. Pull the bobbin thread up through the needle plate slot.
6. Select a straight stitch and test sew on a fabric scrap.

CAUTION! Always turn the handwheel toward you to avoid timing issues. Keep fingers away from the needle while sewing.

Specifications

• Type: Mechanical Heavy-Duty Sewing Machine
• Stitches: 110 Built-in Stitches
• Buttonholes: 1 One-Step Automatic Buttonhole
• Speed: Up to 1100 stitches per minute
• Needle Positions: Adjustable (Left, Center, Right)
• Presser Feet: Includes All-Purpose, Zipper, Buttonhole, Button Sewing, and more
• Bobbin: Class 15 Transparent (Drop-in system)
• Lighting: Built-in LED
• Power Supply: 120V AC, 60Hz
• Warranty: 25-Year Limited Warranty

Controls and Functions

Main controls are located on the right side of the machine body.

Front Panel: Stitch Selection Dial, Stitch Length Dial (0-4 mm), Stitch Width Dial (0-7 mm), Reverse Stitch Button, Needle Up/Down Button.

Basic Operations: Power Switch, Foot Control Pedal (speed control), Handwheel (manual control), Presser Foot Lifter, Bobbin Winder Stop.

Stitch Settings: Use dials to select stitch pattern, length, and width. Refer to stitch chart on machine or manual.

Stitch Selection & Settings

Select from 110 stitches for various projects.

1. Turn the stitch selection dial to the desired pattern number.
2. Adjust stitch length: Higher numbers for longer stitches (basting), lower for shorter (fine fabrics).
3. Adjust stitch width for zigzag and decorative stitches.
4. For buttonholes: Select the one-step buttonhole symbol. Place fabric under foot; machine sews all four sides automatically.
5. Use reverse stitch button to lock the beginning and end of seams.

Tip: Always test stitch settings on a scrap of your project fabric first.

Basic Sewing Operations

Follow these steps for general sewing.

1. Raise the needle to its highest position using the handwheel.
2. Lift the presser foot and place fabric under it, aligning with seam guide.
3. Lower the presser foot.
4. Gently press the foot control to start sewing. Guide fabric gently; do not push or pull.
5. Press the reverse stitch button at the start and end to secure stitches.
6. To finish, raise the needle, lift the presser foot, and pull fabric toward the back to cut threads.
7. For free arm sewing: Remove the accessory tray to access the free arm for sleeves and cuffs.

WARNING! Never sew over pins. Remove them as you approach to avoid needle breakage and injury.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and longevity.

1. Daily: Brush out lint from bobbin area and feed dogs after each project.
2. Weekly: Oil the machine as per manual instructions (specific points only). Use only Singer sewing machine oil.
3. Monthly: Wipe the exterior with a soft, dry cloth. Check needle for burrs and replace if bent or dull.
4. Yearly: Consider professional servicing for internal cleaning and adjustment.

CAUTION! Always unplug the machine before cleaning or maintenance. Do not use compressed air, as it can force lint deeper into the mechanism.

Accessories

The machine includes a comprehensive set of accessories stored in the built-in compartment.

• All-Purpose Foot
• Zipper Foot
• Buttonhole Foot
• Button Sewing Foot
• Overcasting Foot
• Blind Hem Foot
• Seam Ripper/Lint Brush
• Spool Caps (Large and Small)
• Extra Needles (Universal)
• Class 15 Bobbins (4)
• Screwdriver

Warranty Information

Singer Heavy Duty 6600C comes with a 25-year limited warranty covering defects in materials and workmanship under normal household use. The warranty does not cover damage from misuse, neglect, commercial use, or unauthorized repairs. For warranty service, contact Singer Customer Support with proof of purchase. For support, visit www.singer.com or contact 1-800-4-SINGER.

Troubleshooting

Reset: Unplug machine for 2 minutes to reset electronic functions if display acts erratically.

Service: For persistent issues, contact Singer Customer Service at 1-800-4-SINGER or visit www.singer.com.