Nelco JA38 Sewing Machine Manual

The Nelco JA38 is a versatile household sewing machine featuring multiple stitch patterns, adjustable stitch length and width, built-in buttonholer, free arm capability, reverse stitching function, built-in light, and easy threading system. Suitable for various fabrics from lightweight to medium-weight materials. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Sewing machine head, foot pedal, power cord, accessory box, instruction manual.

Installation & Setup

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

1. Remove machine from packaging and remove all protective materials.
2. Attach extension table if using flatbed sewing.
3. Connect foot pedal to machine and power outlet.
4. Install needle following threading diagram.
5. Thread machine according to numbered guides.
6. Insert bobbin following bobbin winding instructions.

WARNING! Keep fingers away from needle area during operation. Always unplug when not in use.

First-Time Operation

Power on machine; test basic functions.

1. Plug in power cord and turn on power switch.
2. Select straight stitch pattern and medium length.
3. Place scrap fabric under presser foot and lower foot.
4. Gently press foot pedal to begin sewing.
5. Practice controlling speed with foot pedal.
6. Test reverse stitch function.

CAUTION! Always start with scrap fabric. Keep work area clean and well-lit.

Specifications

• Machine Type: Electric Household Sewing Machine
• Stitch Patterns: 12 built-in stitches
• Stitch Length: 0-4mm adjustable
• Stitch Width: 0-5mm adjustable
• Buttonhole: One-step automatic
• Max Sewing Speed: 800 stitches per minute
• Needle System: HA-1 standard domestic needles
• Bobbin: Class 15 transparent bobbin
• Power Requirements: 110-120V AC, 60Hz
• Weight: 12.5 lbs (5.7 kg)
• Dimensions: 15.4" x 7.1" x 12.2"

Controls and Settings

Main control panel located on front of machine.

Stitch Selector: Dial for choosing stitch patterns. Stitch Length Dial: Controls stitch length (0-4mm). Stitch Width Dial: Controls zigzag width (0-5mm). Reverse Stitch Lever: Hold for backward sewing. Thread Tension Dial: Adjusts upper thread tension (0-9).

Additional Features: Built-in bobbin winder, drop feed for darning/quilting, presser foot pressure adjustment, free arm conversion.

Stitch Selection

Twelve built-in stitches for various applications.

1. Straight Stitch: Basic sewing, topstitching
2. Zigzag Stitch: Seam finishing, appliqué
3. Three-step Zigzag: Stretch fabrics, mending
4. Blind Hem: Nearly invisible hemming
5. Elastic Stitch: Knits and stretch fabrics
6. Decorative Stitches: Seven decorative patterns
7. Buttonhole: Automatic one-step buttonhole

Tip: Always test stitch on scrap fabric before sewing project.

Maintenance & Cleaning

Regular maintenance ensures optimal performance.

1. Unplug machine before cleaning.
2. Remove needle plate and clean lint buildup.
3. Oil moving parts with sewing machine oil only.
4. Wipe exterior with soft, dry cloth.
5. Replace needle regularly (every 8-10 hours of sewing).
6. Store in dry area covered when not in use.

CAUTION! Use only sewing machine oil. Never use household oils.

Accessories

Standard accessories included with machine.

Safety Information

Important safety precautions for operation.

• Always unplug machine when changing needles, cleaning, or not in use
• Keep fingers away from moving needle
• Do not place anything on foot pedal when not in use
• Use proper lighting in work area
• Keep machine dry and away from water
• Supervise children and inexperienced users
• Disconnect power during electrical storms

WARNING! Never operate with damaged cord or plug.

Regulatory Information

UL Listed: Complies with UL safety standards. FCC Part 15: Class B digital device. Copyright © 2025 Nelco Sewing Machines. All rights reserved. For technical support, visit www.nelcosewing.com or contact 1-800-555-NELCO.

Troubleshooting

Service: 1-800-555-NELCO; www.nelcosewing.com