Overlock Sewing Machine Manual

The Overlock Sewing Machine is a professional-grade serger designed for creating finished seams, preventing fabric fraying, and producing professional-quality edges on various fabrics. It features differential feed, adjustable stitch length and width, built-in rolled hem capability, easy threading system, and multiple stitch options for different fabric types. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Differential feed system, built-in rolled hem, color-coded threading, adjustable stitch length and width, free arm capability, built-in thread cutter.

Safety Instructions

Read all instructions before operating the machine.

1. Always unplug machine when not in use or during maintenance.
2. Keep fingers away from moving parts and needles.
3. Do not operate with damaged cord or plug.
4. Use proper lighting to ensure good visibility.
5. Keep work area clean and free from obstructions.

WARNING! Never operate machine with guards removed. Always disconnect power before changing needles or performing maintenance.

Machine Setup

Unpack and assemble machine on stable surface.

1. Remove all packaging materials and protective covers.
2. Place machine on sturdy table or sewing cabinet.
3. Connect foot control to machine.
4. Plug power cord into grounded electrical outlet.
5. Install needle following directional arrow.
6. Thread machine according to color-coded guides.

CAUTION! Ensure machine is on stable surface to prevent tipping. Use proper needle for fabric type.

Specifications

• Stitch Types: 3-thread overlock, 2-thread overlock, rolled hem, flatlock
• Stitch Length: 2.0-4.0mm adjustable
• Stitch Width: 3.0-7.0mm adjustable
• Speed: Up to 1300 stitches per minute
• Differential Feed Ratio: 0.7-2.0
• Needle System: HAx1 SP
• Looper Thread: Standard serger cones
• Power Requirements: 120V, 60Hz
• Weight: 15.4 lbs (7 kg)
• Dimensions: 13" x 11" x 12"

Controls and Settings

Main controls: Power switch, stitch length dial, stitch width dial, differential feed dial, tension dials (4), presser foot lever, handwheel.

Adjustment Dials: Upper looper tension, lower looper tension, right needle tension, left needle tension, stitch length, stitch width, differential feed.

Stitch Selection: 3-thread overlock for standard seams, 2-thread for lightweight fabrics, rolled hem for narrow edges, flatlock for decorative seams. Tension Settings: Balanced tension for most fabrics, adjust for specialty fabrics.

Threading Instructions

Follow color-coded threading path for proper operation.

1. Raise presser foot and needle to highest position.
2. Follow numbered threading guides (1-4) in order.
3. Thread upper looper (blue guide) first.
4. Thread lower looper (green guide) second.
5. Thread right needle (red guide) third.
6. Thread left needle (yellow guide) if using 4-thread.
7. Pull threads under presser foot toward back.

Tip: Always thread with presser foot raised to open tension discs.

Stitch Selection

Select appropriate stitch for your project requirements.

1. 3-thread overlock: Standard seam finishing for most fabrics
2. 2-thread overlock: Lightweight fabrics and delicate materials
3. Rolled hem: Narrow hemming for scarves, napkins, sheers
4. Flatlock: Decorative seams for activewear and knit fabrics
5. Differential feed: Adjust for stretchy or slippery fabrics

WARNING! Always test stitch on fabric scrap before starting project. Adjust tensions as needed.

Maintenance & Cleaning

Regular maintenance ensures optimal performance.

1. Unplug machine before cleaning.
2. Remove needle plate and clean lint buildup.
3. Oil moving parts as specified in manual.
4. Wipe exterior with soft, dry cloth.
5. Check needle for damage before each use.

CAUTION! Use only recommended oil. Do not use compressed air for cleaning.

Accessories

Standard accessories included: Screwdriver, tweezers, lint brush, oil, spare needles, spool caps, instructional DVD.

Optional accessories: Gathering foot, piping foot, blind hem foot, elastic foot, seam guide.

Regulatory Information

UL Listed: Complies with UL safety standards. FCC Part 15: Class B digital device. CE Certified: Meets European safety standards. Copyright © 2025 Overlock Sewing Machines. For technical support, visit www.overlock-support.com or contact 1-800-555-SEWING.

Troubleshooting

Service: 1-800-555-SEWING; www.overlock-support.com