Nelco Sewing Machine B310 Manual

The Nelco Sewing Machine B310 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, foot pedal control, and easy threading system. Suitable for various fabrics including cotton, denim, silk, and synthetic materials. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation and Setup 3. First-Time Operation 4. Technical Specifications 5. Controls and Functions 6. Stitch Selection Guide 7. Threading Instructions 8. Maintenance and Cleaning 9. Accessories Included 10. Safety Precautions 11. Troubleshooting

Features at a Glance

Key components: Main body with free arm, Foot pedal, Power cord, Bobbins, Needles, Presser feet set, Instruction manual.

Feature	Description
Stitch Patterns	12 built-in stitch patterns including straight, zigzag, and decorative
Stitch Length Control	Adjustable from 0-4mm
Stitch Width Control	Adjustable from 0-5mm
Built-in Buttonholer	One-step automatic buttonhole
Free Arm	For sewing cuffs and tubular items
Reverse Stitch	For reinforcing seams
Built-in Light	LED work area illumination
Foot Pedal	Speed control with foot operation
Thread Tension	Adjustable upper thread tension
Bobbin System	Drop-in bobbin with clear cover

Installation and Setup

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

Connect power: Plug power cord into machine and wall outlet (220V AC, 50Hz).
Install needle: Loosen needle clamp screw, insert needle with flat side facing back.
Wind bobbin: Place empty bobbin on winder, thread through bobbin winding tension disk.
Insert bobbin: Open bobbin cover, drop bobbin into case with thread clockwise.
Thread upper thread: Follow numbered threading guide on machine.

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

First-Time Operation

Plug in machine and turn on power switch.

Select straight stitch: Turn pattern selector to straight stitch position.
Set stitch length: Adjust to medium setting (2.5mm).
Practice on scrap fabric: Place fabric under presser foot, lower foot lever.
Start sewing: Gently press foot pedal to begin stitching.
Reverse stitching: Press reverse button to secure seam ends.

CAUTION! Always use correct needle for fabric type. Replace bent or damaged needles immediately.

Technical Specifications

Machine Type: Electric Household Sewing Machine
Stitch Patterns: 12 built-in patterns
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 needles
Bobbin Type: Class 15 transparent bobbins
Power Requirements: 220V AC, 50Hz, 70W
Weight: 6.5 kg
Dimensions: 330mm x 165mm x 255mm

Controls and Functions

Main Controls: Power switch, Stitch pattern selector, Stitch length dial, Stitch width dial, Reverse stitch button, Handwheel.

Operation Panel: Pattern symbols, Stitch length indicators, Stitch width indicators, Thread tension dial.

Basic Functions: Straight stitch for seams, Zigzag stitch for finishing edges, Buttonhole stitch for buttons, Decorative stitches for embellishment, Reverse stitch for reinforcement, Free arm for circular sewing.

Stitch Selection Guide

Pattern 1-3: Straight stitches (various lengths)

Pattern 4-6: Zigzag stitches (different widths)

Pattern 7-9: Decorative stitches (scallop, honeycomb)

Pattern 10: Blind hem stitch

Pattern 11: Elastic stitch

Pattern 12: Buttonhole stitch

Turn pattern selector dial to desired stitch number.
Adjust stitch length and width as needed.
Test stitch on scrap fabric before sewing project.

Tip: Use longer stitches for basting, shorter stitches for fine fabrics.

Threading Instructions

Upper Threading:

Raise presser foot and needle to highest position.
Place spool on spool pin.
Follow numbered threading path: Through first thread guide, around tension disks, through take-up lever, down to needle.
Thread needle from front to back.

Bobbin Threading:

Wind bobbin on bobbin winder.
Insert bobbin into case with thread moving clockwise.
Pull thread through slot and under tension spring.
Close bobbin cover.

Maintenance and Cleaning

Daily: Remove lint from bobbin area and feed dogs with brush provided.

Weekly: Oil moving parts with sewing machine oil (2-3 drops).

Monthly: Clean tension disks with soft cloth.

CAUTION! Unplug machine before cleaning or maintenance. Use only sewing machine oil.

Accessories Included

All-purpose foot
Zipper foot
Buttonhole foot
Button sewing foot
Seam ripper
Brush
Needles (assorted sizes)
Bobbins (4 pieces)
Screwdriver
Spool cap

Safety Precautions

Always unplug machine when not in use, during threading, or when changing needles.

Keep fingers away from moving needle. Do not pull fabric while sewing.

Use proper ventilation when sewing for extended periods.

Store in dry place away from children and pets.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Needle breaks	Wrong needle size, bent needle, pulling fabric	Replace needle, use correct size, don't pull fabric
Thread bunching	Incorrect threading, tension too loose	Re-thread machine, adjust tension
Skipped stitches	Blunt needle, wrong needle type	Replace needle, use correct needle for fabric
Machine jams	Thread caught in bobbin, lint buildup	Clean bobbin area, remove tangled thread
Uneven stitches	Incorrect tension, dirty feed dogs	Adjust tension, clean feed dogs
Motor not running	Power cord disconnected, foot pedal issue	Check power connection, inspect foot pedal

Service: For technical support, contact authorized Nelco service center. Warranty: 2 years on motor, 1 year on parts.