Janome CompuLock Serger Manual

The Janome CompuLock Serger is a professional-grade sewing machine featuring computerized controls, differential feed system, easy threading system, multiple stitch options, built-in rolled hem capability, adjustable stitch length and width, and automatic tension control. Designed for both home and professional use, this serger provides clean finishes for seams, hems, and decorative edges. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation & Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Threading Instructions 7. Stitch Selection 8. Maintenance & Cleaning 9. Safety Information 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Computerized control panel, differential feed system, built-in rolled hem, easy threading guides, stitch length/width dials, tension control dials, free arm capability.

Feature	Description
Differential Feed	Prevents fabric stretching or puckering
Rolled Hem	Built-in capability for narrow rolled hems
Easy Threading System	Color-coded threading guides
Stitch Length Control	Adjustable from 1-4mm
Stitch Width Control	Adjustable from 3-7mm
Tension Dials	Individual controls for each thread
Free Arm	For sewing cuffs and small circular items
LED Display	Shows stitch settings and error codes
Power Switch	Turns machine on/off
Foot Pedal	Variable speed control

Installation & Setup

Unpack and inspect contents. Place on stable sewing table.

Remove packaging materials and protective covers
Attach power cord to machine and plug into outlet
Install presser foot appropriate for your project
Thread machine following color-coded guides
Insert needles properly with flat side to the back

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

First-Time Operation

Power on machine; follow basic setup procedure.

Thread machine: Follow color-coded guides from spool to needle
Select basic overlock stitch for initial testing
Test on scrap fabric to check tension and stitch quality
Adjust tension dials if needed for balanced stitches
Practice basic seams and finishes

CAUTION! Always use proper needle for fabric type. Test stitches on scrap fabric first.

Specifications

Stitch Types: 2/3/4 thread overlock, rolled hem, flatlock
Stitch Length: 1-4mm adjustable
Stitch Width: 3-7mm adjustable
Speed: Up to 1300 stitches per minute
Differential Feed Ratio: 0.7-2.0
Needles: Standard sewing machine needles
Power Source: 120V AC, 60Hz
Weight: Approximately 15 lbs
Warranty: 25-year limited warranty

Controls and Settings

Access settings via control panel and dials. Front Panel: Power switch, stitch selection buttons, tension dials, stitch length/width controls.

Control Panel: Power, Stitch Type selection, Differential Feed adjustment, Tension controls, LED display.

Stitch Selection: Overlock (2/3/4 thread), Rolled Hem, Flatlock. Tension: Individual dials for upper/lower looper and needles. Differential Feed: Adjust for different fabric types. Stitch Length/Width: Dial controls for precise adjustments.

Threading Instructions

Follow color-coded threading path for each thread.

Turn off power before threading
Follow numbered threading guides in sequence
Use color-coded paths for different threads
Ensure threads are properly seated in tension discs
Thread needles last, from front to back

Tip: Use tweezers for difficult threading areas. Always test thread tension on scrap fabric.

Stitch Selection

Supports multiple stitch types for various applications.

Overlock Stitch: Basic seam finishing (2/3/4 thread options)
Rolled Hem: Narrow hem for delicate fabrics
Flatlock: Decorative seam for stretch fabrics
Select stitch type using control panel buttons
Adjust stitch length/width for desired effect
Test on scrap fabric before starting project
Use appropriate presser foot for selected stitch

WARNING! Do not change stitches while machine is running. Always stop completely before making adjustments.

Maintenance & Cleaning

Regular maintenance ensures optimal performance.

Clean lint buildup after each project
Oil moving parts as specified in manual
Check needle regularly for damage
Inspect and replace worn parts as needed
Store covered when not in use

CAUTION! Unplug machine before cleaning or maintenance. Use only recommended oils and cleaners.

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

Regulatory Information

UL Listed: Complies with UL safety standards. FCC Part 15: Class B digital device; complies with interference limits. Copyright © 2025 Janome; trademarks of Janome America, Inc. For support, visit www.janome.com or contact 1-800-631-0183.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Thread breaking	Incorrect tension/threading	Re-thread following guides; adjust tension; check for burrs
Uneven stitches	Differential feed setting	Adjust differential feed ratio; check thread tension
Machine won't start	Power/pedal issues	Check power connection; inspect foot pedal; reset machine
Fabric puckering	Tension/feed issues	Adjust tension and differential feed; use stabilizer
Needle breaking	Incorrect needle/bent	Replace needle; ensure proper installation; check for obstruction

Reset: Turn power off and on to reset computerized functions.

Service: 1-800-631-0183; www.janome.com