Singer Sewing Machine M3400 Manual

The Singer M3400 is a mechanical sewing machine designed for beginners and intermediate sewers, featuring 23 built-in stitches, a 4-step buttonhole, automatic needle threader, adjustable stitch length and width, free arm capability, built-in LED light, and drop feed for free-motion sewing. Powered by 110-120V AC, this versatile machine handles various fabrics with ease. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Unpacking and Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Stitch Selection Guide 7. Threading and Bobbin 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Mechanical sewing machine body, foot pedal, power cord, accessory kit, instruction manual.

Feature	Description
Built-in Stitches	23 stitches including straight, zigzag, decorative, and stretch
4-Step Buttonhole	Easy manual buttonhole creation
Automatic Needle Threader	Simplifies threading process
Stitch Length/Width Control	Adjustable for different fabric types
Free Arm	For sewing cuffs and tubular items
Drop Feed	Enables free-motion sewing and darning
Built-in LED Light	Illuminates sewing area
Reverse Stitch Lever	For reinforcing seams
Bobbin Winding System	Built-in bobbin winder
Accessory Storage	Built-in compartment for feet and tools

Unpacking and Setup

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

Remove machine from packaging: Lift carefully from carrying case.
Attach foot pedal: Connect pedal cord to machine port.
Connect power: Plug power cord into machine and wall outlet (110-120V).
Install needle: Loosen needle clamp screw, insert needle with flat side to back, tighten.
Wind bobbin: Follow bobbin winding instructions in manual.

WARNING! Keep fingers away from needle area during operation. Ensure machine is unplugged during setup.

First-Time Operation

Plug in machine and power on; follow basic threading steps.

Thread upper thread: Follow numbered threading path on machine.
Insert bobbin: Place bobbin in case with thread unwinding counterclockwise.
Select stitch: Turn stitch selection dial to desired pattern.
Adjust settings: Set stitch length (0-4) and width (0-5) as needed.
Test sew: Use scrap fabric to practice stitching.

CAUTION! Always start with needle in highest position. Keep hands clear of moving parts.

Specifications

Model: Singer M3400 Mechanical Sewing Machine
Stitches: 23 built-in stitches
Buttonhole: 4-step manual buttonhole
Stitch Length: Adjustable up to 4mm
Stitch Width: Adjustable up to 5mm
Speed: Up to 750 stitches per minute
Presser Feet: Includes all-purpose, zipper, buttonhole, button sewing feet
Needle: Standard domestic needle system 130/705H
Power Source: 110-120V AC, 60Hz
Weight: 13.2 lbs (6 kg)
Warranty: 25-year limited warranty

Controls and Settings

Main controls located on front and side of machine.

Front Panel: Stitch selection dial, stitch length dial, stitch width dial, reverse stitch lever, bobbin winder, thread tension dial.

Side Controls: Handwheel, power/light switch, foot pedal jack, presser foot lever, drop feed lever.

Stitch Length: 0-4mm adjustment (0 for bobbin winding). Stitch Width: 0-5mm adjustment for zigzag and decorative stitches. Tension: Dial 1-9 (4 is normal). Needle Position: Adjustable with handwheel.

Stitch Selection Guide

Stitch dial includes symbols for each stitch type.

Straight Stitch (1-3): For seams, topstitching, basting.
Zigzag Stitch (4-6): For finishing edges, appliqué, stretch fabrics.
Decorative Stitches (7-15): For embellishment and decorative sewing.
Stretch Stitches (16-19): For knit fabrics and elastic materials.
Buttonhole Stitch (20): 4-step process for creating buttonholes.
Blind Hem Stitch (21): For nearly invisible hems.
Overcast Stitch (22-23): For finishing seam edges.

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

Threading and Bobbin

Proper threading ensures smooth operation.

Upper Threading: Raise presser foot, follow numbered path from spool to needle.
Automatic Needle Threader: Lower lever, hook thread through guide, release.
Bobbin Winding: Place spool on pin, thread through tension disc, wind bobbin.
Bobbin Insertion: Remove bobbin case, insert bobbin with thread counterclockwise.
Bring Up Bobbin Thread: Hold upper thread, turn handwheel to bring up bobbin thread.

WARNING! Ensure machine is off when threading. Keep thread path clean.

Care & Maintenance

Regular maintenance ensures optimal performance.

Cleaning: Unplug machine. Remove needle plate to clean lint with brush.
Oiling: Apply sewing machine oil to moving parts as indicated in manual.
Needle Replacement: Change needle after 8-10 hours of sewing or for new project.
Storage: Cover machine when not in use to prevent dust accumulation.

CAUTION! Unplug before cleaning. Use only Singer-recommended oil.

Regulatory Information

UL Listed: Complies with UL safety standards. FCC Part 15: Class B digital device. Copyright © Singer Manufacturing Company. All rights reserved. For support, visit www.singer.com or contact 1-800-4-SINGER. Serial number located on machine base.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Machine won't run	Not plugged in/power issue	Check power connection; ensure foot pedal is connected.
Thread bunching underneath	Incorrect threading/tension	Re-thread upper and bobbin thread; adjust tension.
Needle breaks	Wrong needle/bent needle	Replace needle; ensure it's inserted correctly.
Uneven stitches	Dirty feed dogs/thread issue	Clean feed dogs; re-thread with quality thread.
Machine skips stitches	Dull needle/wrong needle type	Change needle; use correct needle for fabric.
Buttonhole doesn't form	Incorrect steps/stabilizer missing	Follow 4-step sequence; use stabilizer for lightweight fabrics.
Noise during operation	Lint buildup/needs oiling	Clean and oil machine as per manual.

Reset: Unplug machine for 5 minutes to reset electronic components.

Service: 1-800-4-SINGER; www.singer.com for authorized service centers.