Janome MyLock 234D Overlocker Manual

The Janome MyLock 234D is a professional-grade 3/4 thread overlocker with differential feed, built-in rolled hem, adjustable stitch length and width, free arm capability, built-in thread cutter, color-coded threading system, and built-in needle threader. Designed for sewing, finishing, and decorative edging on various fabrics. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Overlocker machine with differential feed system, free arm, built-in rolled hem, color-coded threading paths, built-in needle threader, and accessory kit.

Unpacking and Setup

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

1. Remove packaging materials and protective covers
2. Attach accessory box to right side of machine
3. Install foot control and power cord
4. Raise presser foot lever and needle to highest position
5. Plug into appropriate power outlet

WARNING! Machine is heavy; lift with care using both hands. Ensure stable work surface.

First-Time Operation

Power on machine; follow threading sequence carefully.

1. Thread upper and lower loopers following color-coded guides
2. Thread needles using built-in needle threader
3. Select basic overlock stitch (3-thread)
4. Test on fabric scrap to adjust tension settings
5. Practice basic seams and finishes

CAUTION! Keep fingers away from moving needles during operation.

Specifications

• Stitch Types: 3-thread overlock, 4-thread safety stitch, rolled hem
• Stitch Length: 1-4mm adjustable
• Stitch Width: 3.5-7mm adjustable
• Differential Feed: 0.7-2.0 ratio
• Speed: Up to 1300 stitches per minute
• Needles: HAx1 SP system, 2 needles included
• Power Supply: 110-120V, 60Hz
• Dimensions: 15.7" x 11.8" x 13.4" (WxDxH)
• Weight: 19.8 lbs

Controls and Settings

Main controls: Power switch, stitch length dial, stitch width dial, differential feed dial, rolled hem lever, presser foot pressure dial.

Adjustment Dials: Stitch length (1-4), stitch width (3.5-7mm), differential feed (0.7-2.0), tension discs (upper looper, lower looper, needles).

Special Features: Rolled hem conversion, free arm conversion, built-in thread cutter, built-in needle threader, LED work light.

Threading Instructions

Follow color-coded threading path for each thread.

1. Upper looper (blue path): Thread through blue guides first
2. Lower looper (green path): Thread through green guides
3. Right needle (red path): Thread through red guides
4. Left needle (yellow path): Thread through yellow guides (4-thread)
5. Use built-in needle threader for easy needle threading

Tip: Always thread with presser foot raised and needle at highest position.

Stitch Selection

Supports multiple stitch types for various applications.

1. 3-thread overlock: Basic seam finishing
2. 4-thread safety stitch: Stronger seams for heavy fabrics
3. Rolled hem: Delicate edge finishing on lightweight fabrics
4. Flatlocking: Decorative seams and appliqué
5. Differential feed adjustments for stretch or slippery fabrics

WARNING! Always test stitch settings on fabric scraps before starting project.

Maintenance & Cleaning

Regular maintenance ensures optimal performance.

1. Clean lint and dust after each use
2. Oil moving parts as specified in manual
3. Check needle condition regularly
4. Clean feed dogs and throat plate
5. Store covered when not in use

CAUTION! Unplug machine before cleaning or maintenance.

Safety Information

Always follow safety guidelines to prevent injury.

• Keep fingers away from moving needles
• Unplug when not in use or during maintenance
• Use proper lighting in work area
• Keep hair and loose clothing secured
• Do not operate if damaged or malfunctioning

Troubleshooting

Service: Contact authorized Janome service center for repairs.

Support: Visit www.janome.com or contact customer service.