Necchi BU Sewing Machine Manual

The Necchi BU is a classic sewing machine featuring straight and zigzag stitching, built-in buttonholer, free arm capability, adjustable stitch length and width, reverse stitching, built-in light, drop feed for darning and embroidery, and multiple presser feet. Powered by 120V AC, 60Hz. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Free arm sewing machine, built-in stitch patterns, drop feed mechanism, built-in light, multiple presser feet, reverse stitch function.

Installation

Unpack and inspect contents. Place on stable surface.

1. Remove machine from packaging: Lift carefully from case.
2. Position machine: Place on sturdy table at comfortable height.
3. Connect foot pedal: Plug into machine socket.
4. Connect power: Plug into 120V AC outlet.
5. Install accessories: Attach standard presser foot.

WARNING! Machine is heavy; lift with care to avoid injury. Ensure stable surface placement.

First-Time Setup

Prepare machine for first use.

1. Wind bobbin: Follow threading diagram for proper bobbin winding.
2. Thread upper thread: Follow numbered threading path.
3. Insert bobbin: Place in bobbin case with thread pulling counterclockwise.
4. Test stitching: Use scrap fabric to test stitch quality.
5. Adjust tension: Fine-tune for balanced stitches.

CAUTION! Keep fingers away from needle area during operation.

Specifications

• Machine Type: Free arm sewing machine
• Stitch Types: Straight, zigzag, stretch stitches
• Stitch Length: 0-4mm adjustable
• Stitch Width: Up to 5mm for zigzag
• Buttonhole: One-step automatic
• Feed System: Drop feed with adjustable pressure
• Needle System: 130/705 H household needles
• Bobbin: Class 15 transparent
• Power Source: 120V AC, 60Hz
• Motor: Built-in DC motor

Controls and Settings

Main controls located on front and side of machine.

Front Panel: Stitch pattern selector, stitch length dial, stitch width dial, reverse stitch lever.

Stitch Selection: Turn dial to select straight, zigzag, or decorative stitches. Stitch Length: Adjust for fabric type (shorter for fine fabrics, longer for heavy). Stitch Width: Control zigzag width. Reverse: Hold lever for backstitching. Tension: Adjust upper thread tension dial (4-6 for normal fabrics).

Threading and Bobbin

Proper threading essential for good stitch quality.

1. Wind bobbin: Place thread on spool pin, guide through tension, wind onto bobbin.
2. Upper threading: Follow numbered path from spool to needle.
3. Bobbin insertion: Place in case, pull thread through slot, insert into machine.
4. Bring up bobbin thread: Hold upper thread, turn handwheel toward you.

Tip: Always use good quality thread and change needles regularly.

Basic Sewing Operations

Fundamental sewing techniques.

1. Straight stitching: Select straight stitch pattern, adjust length as needed.
2. Zigzag stitching: Select zigzag, adjust width for purpose.
3. Reverse stitching: Use at beginning and end of seams.
4. Seam finishing: Use zigzag to prevent fabric fraying.
5. Gathering: Use longer stitch length for easy gathering.

WARNING! Always turn handwheel toward you; never force machine.

Advanced Functions

Special features for varied sewing tasks.

1. Buttonholes: Use automatic buttonholer with buttonhole foot.
2. Zipper insertion: Use zipper foot for invisible applications.
3. Darning: Drop feed dogs for free-motion work.
4. Embroidery: Use embroidery foot with dropped feed.
5. Blind hem: Use blind hem foot and stitch.

Care & Maintenance

Regular maintenance ensures optimal performance.

1. Cleaning: Remove lint from bobbin area and feed dogs regularly.
2. Oiling: Apply sewing machine oil to moving parts as directed.
3. Needle replacement: Change needle after 8-10 hours of sewing.
4. Storage: Cover machine when not in use.

CAUTION! Unplug machine before cleaning or maintenance.

Regulatory Information

UL Listed: Complies with safety standards for household sewing machines. Copyright © Necchi; trademarks of Necchi Corporation. For support, visit www.necchi.com or contact 1-800-555-1234.

Troubleshooting

Service: 1-800-555-1234; www.necchi.com