janome 3434d serger manual

The Janome 3434D Serger is a professional-grade 3/4 thread overlock machine designed for home and light commercial use. It features differential feed for handling various fabric types, built-in rolled hem capability, easy threading system, adjustable stitch length and width, free arm capability, and built-in thread cutter. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 3/4 thread overlock capability, Differential feed system, Built-in rolled hem, Free arm design, Built-in thread cutter, Stitch length and width controls.

Unpacking and Setup

Carefully unpack all components and place on stable surface.

1. Remove machine from packaging: Lift from base, not by free arm.
2. Install foot control: Connect to machine and power source.
3. Position machine: Ensure adequate workspace and lighting.
4. Connect power: Plug into appropriate electrical outlet.
5. Install accessories: Attach standard presser foot and thread spools.

WARNING! Machine is heavy; lift with proper technique. Ensure stable work surface.

First-Time Operation

Power on machine; follow threading diagram.

1. Thread machine: Follow color-coded threading path for upper and lower loopers.
2. Test stitches: Use scrap fabric to test tension settings.
3. Adjust tensions: Use tension dials to achieve balanced stitches.
4. Practice basic seams: Begin with straight seams on medium-weight fabric.
5. Experiment with differential feed: Test on stretch and woven fabrics.

CAUTION! Keep fingers away from moving needles. Always use proper threading sequence.

Technical Specifications

• Type: 3/4 Thread Overlock Machine
• Stitch Length: 1-4mm adjustable
• Stitch Width: 3-7mm adjustable
• Differential Feed Ratio: 0.7-2.0
• Speed: Up to 1300 stitches per minute
• Needles: HAx1 SP system, size 11/80 or 14/90
• Thread: Standard serger thread or all-purpose thread
• Power Requirements: 120V, 60Hz
• Dimensions: Standard serger size with free arm capability
• Weight: Approximately 15.4 lbs (7 kg)

Controls and Settings

Main controls located on front and side of machine.

Front Panel: Stitch length dial, Stitch width dial, Differential feed dial, Thread tension dials (4), Presser foot lever, Power switch.

Stitch Length: Adjust from 1mm (short) to 4mm (long). Stitch Width: Adjust from 3mm (narrow) to 7mm (wide). Differential Feed: Adjust from 0.7 (gathering) to 2.0 (stretching). Thread Tension: Four individual dials for perfect stitch balance. Presser Foot: Lever-operated lifting mechanism.

Threading the Machine

Follow color-coded threading path for proper operation.

1. Raise presser foot and needles to highest position.
2. Follow numbered threading sequence: Upper looper (blue), Lower looper (green), Right needle (red), Left needle (yellow).
3. Use threading tool for difficult-to-reach areas.
4. Pull threads under presser foot toward rear of machine.
5. Test thread tension on scrap fabric before beginning project.

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

Stitch Selection and Applications

Versatile stitch options for various sewing applications.

1. 3-thread overlock: Basic seam finishing, ideal for most fabrics.
2. 4-thread safety stitch: Strong seam for garment construction.
3. Rolled hem: Narrow hem for lightweight fabrics and decorative edges.
4. Flatlocking: Creates flat seams for activewear and decorative effects.
5. Gathering: Use differential feed for controlled gathering.
6. Lettuce edge: Stretch technique for decorative edges on knits.

WARNING! Always test stitches on scrap fabric. Adjust tensions for different fabric types.

Maintenance and Cleaning

Regular maintenance ensures optimal performance.

1. Daily: Brush away lint from feed dogs and loopers.
2. Weekly: Oil machine according to lubrication points diagram.
3. Monthly: Remove throat plate and clean race hook area.
4. As needed: Replace needles regularly for best stitch quality.
5. Storage: Cover machine when not in use to prevent dust accumulation.

CAUTION! Unplug machine before cleaning or maintenance. Use only recommended lubricants.

Safety Information

Always follow safety guidelines to prevent injury.

• Keep fingers away from moving needles and cutting blade
• Unplug machine when not in use or during maintenance
• Use proper lighting to ensure clear visibility
• Keep work area clean and organized
• Do not operate with damaged power cord
• Keep machine away from water and moisture
• Store accessories properly to prevent loss or damage

Troubleshooting

Service: Contact authorized Janome service center for professional repairs.

Support: Visit www.janome.com or contact customer service at 1-800-631-0183