Singer M3400 Sewing Machine Manual

The Singer M3400 is a versatile mechanical sewing machine featuring 34 built-in stitches, a 4-step buttonhole, automatic needle threader, adjustable stitch length and width, free arm capability, and a built-in LED light. It is designed for beginners and intermediate sewers, offering easy operation for a variety of sewing projects. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Mechanical sewing machine with built-in stitches, Free Arm, Automatic Needle Threader, LED Light, Foot Pedal, Accessory Storage.

Unpacking and Setup

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

1. Remove machine and accessories from packaging.
2. Attach the Free Arm accessory (if applicable).
3. Plug the power cord into the machine and then into a standard 120V AC outlet.
4. Insert the foot pedal plug into the machine's port.
5. Install the needle and presser foot as described in the threading section.

WARNING! Keep fingers away from the needle area during setup and operation. Ensure the machine is unplugged when threading or changing accessories.

First-Time Operation

Power on the machine using the power switch; the LED light will illuminate.

1. Wind and insert the bobbin following the threading guide.
2. Thread the upper thread using the automatic needle threader.
3. Select a basic straight stitch (stitch #1) using the stitch selector dial.
4. Place fabric under the presser foot, lower the presser foot lever, and gently press the foot pedal to start sewing.
5. Practice on scrap fabric to adjust stitch length and tension.

CAUTION! Always start with the needle in the highest position. Do not force the fabric; let the feed dogs move it.

Specifications

• Model: Singer M3400
• Stitches: 34 Built-in Stitches
• Buttonhole: 4-Step Manual Buttonhole
• Needle Threader: Automatic
• Lighting: Built-in LED Light
• Stitch Length: Adjustable up to 4mm
• Stitch Width: Adjustable up to 5mm
• Free Arm: Yes
• Max Sewing Speed: 750 stitches per minute
• Power Source: 120V AC, 60Hz
• Included Accessories: All-Purpose Foot, Buttonhole Foot, Zipper Foot, Button Sewing Foot, Darning Plate, Pack of Needles, Bobbins, Seam Ripper/Lint Brush, Auxiliary Spool Pin, Screwdriver

Controls and Settings

Access all functions via dials and levers on the front and side of the machine.

Main Controls: Power Switch, Stitch Selector Dial, Stitch Length Dial, Stitch Width Dial, Reverse Stitch Lever, Bobbin Winder Spindle, Handwheel.

Stitch Length Dial: Adjusts from 0 (for buttonholes) to 4mm. Stitch Width Dial: Adjusts from 0mm to 5mm for zigzag and decorative stitches. Tension Dial: Adjusts upper thread tension (typically set between 4-5 for balanced stitches). Presser Foot Pressure: Adjustable via dial on top of machine for different fabric thicknesses.

Stitch Selection and Applications

Refer to the stitch chart on the machine or manual for specific stitch numbers and uses.

1. Straight Stitch (1-3): For basic seaming, topstitching, and basting.
2. Zigzag Stitch (4-6): For finishing edges, sewing stretch fabrics, and appliqué.
3. Decorative Stitches (7-24): For embellishing projects.
4. Stretch Stitches (25-34): For knits and elastic fabrics to prevent popped seams.
5. 4-Step Buttonhole (B1-B4): Use the buttonhole foot and follow the numbered steps marked on the machine.

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

Threading and Bobbin Winding

Supports standard sewing thread and Class 15 transparent bobbins.

1. Winding the Bobbin: Place spool on spool pin. Guide thread through bobbin winding tension disk. Place empty bobbin on spindle, push to the right. Hold thread end, press foot pedal until bobbin is full, then cut thread.
2. Inserting the Bobbin: Open the bobbin cover. Place bobbin in case with thread unwinding counterclockwise. Pull thread through the slot and under the tension spring. Close the cover.
3. Threading the Upper Thread: Raise presser foot and needle to highest position. Follow numbered threading path on machine. Use the automatic needle threader by pulling the lever down towards you, hooking the thread, and releasing the lever.

WARNING! Ensure the presser foot is raised when threading to open the upper tension discs.

Maintenance & Cleaning

Unplug the machine before any maintenance. Regularly clean lint and dust from the bobbin area and feed dogs using the lint brush.

1. Remove the needle plate and bobbin case to access the bobbin area.
2. Use the lint brush to remove all lint and thread fragments.
3. Apply a small drop of sewing machine oil to the hook race (as indicated in the manual) every few months or after extensive use.
4. Wipe the exterior with a soft, dry cloth.

CAUTION! Do not use compressed air, as it can force lint deeper into the mechanism. Use only sewing machine oil; other oils can damage the machine.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Singer Manufacturing Company. For support, visit www.singer.com or contact Singer customer service. This product is designed for household use only.

Troubleshooting

Reset: Unplug machine for 60 seconds to reset electronic components.

Service: For technical support, visit www.singer.com or contact authorized Singer service centers.