Introduction
This manual provides comprehensive instructions for the safe and efficient operation, setup, and maintenance of your Elna Explore 340s Mechanical Sewing Machine. Please read this manual thoroughly before using the machine to ensure proper function and to prevent damage.
Safety Information
- Always unplug the machine from the electrical outlet when removing covers, lubricating, or when making any other user servicing adjustments mentioned in the instruction manual.
- Keep fingers away from all moving parts. Special care is required around the sewing machine needle.
- Use only accessories recommended by the manufacturer as contained in this manual.
- Never operate the sewing machine if it has a damaged cord or plug, if it is not working properly, or if it has been dropped or damaged.
Product Overview
The Elna Explore 340s is a versatile mechanical sewing machine designed for various sewing projects, offering 23 built-in stitches including utility, stretch, and decorative options. It features a jam-proof top-loading bobbin and a portable design with an extra-wide sewing bed.
Key Features
- 23 Built-in utility, stretch, and decorative stitches.
- Jam-proof, top-loading horizontal rotary hook bobbin system.
- Automatic one-step buttonhole function.
- Built-in needle threader for ease of use.
- Free-arm sewing capability by removing the accessory tray.
- Adjustable thread tension and presser foot pressure.
- Lightweight and portable, yet robust for various sewing tasks.
Machine Components

Figure 1: Front view of the Elna Explore 340s Mechanical Sewing Machine, showing stitch selection dial, tension dial, and main body.

Figure 2: Angled front view of the Elna Explore 340s, highlighting the stitch pattern display and control dials.

Figure 3: Rear view of the Elna Explore 340s, showing the power input and foot controller connection.
Included Accessories
The following accessories are included with your Elna Explore 340s sewing machine:

Figure 4: Included accessories: various presser feet, bobbins, seam ripper, needle set, screwdriver, and other tools.
- Standard foot A
- Overedge foot C
- Zipper foot E
- Satin stitch foot F
- Blind hem foot G
- Automatic buttonhole foot R
- Quilting guide bar
- Bobbins (x3)
- Seam ripper
- Needle set
- Lint brush
- Screwdriver
- Spool holder small (x1)
- Spool holder large (x1)
- Additional spool pin
- Spool felt
- Foot controller
- Hard cover
Setup
Unpacking and Placement
- Carefully remove the machine from its packaging.
- Place the machine on a stable, flat surface.
- Ensure adequate lighting for your work area.
Power Connection
- Connect the foot controller plug to the machine's power socket.
- Insert the power plug into a suitable electrical outlet.
- Turn on the power switch, usually located on the side of the machine.
Winding the Bobbin
- Place a spool of thread on the spool pin.
- Guide the thread through the upper thread guide and around the bobbin winding tension disc.
- Place an empty bobbin onto the bobbin winder spindle.
- Wind the thread a few times manually around the bobbin.
- Push the bobbin winder spindle to the right.
- Press the foot controller to start winding. Stop when the bobbin is full.
- Cut the thread and push the bobbin winder spindle back to the left.
Inserting the Bobbin
- Open the bobbin cover plate.
- Insert the wound bobbin into the bobbin case, ensuring the thread unwinds counter-clockwise.
- Guide the thread through the tension spring and into the thread guide slot.
- Replace the bobbin cover plate.
Threading the Upper Thread

Figure 5: Close-up view of the needle area, showing the thread path through the needle and presser foot.

Figure 6: Detailed view of the built-in needle threader mechanism, simplifying the threading process.
- Raise the presser foot lever.
- Place the spool of thread on the spool pin.
- Guide the thread through the upper thread guide.
- Follow the numbered threading path down the front of the machine, around the tension discs, and up to the take-up lever.
- Thread the take-up lever from right to left.
- Continue guiding the thread down to the needle bar thread guide.
- Use the built-in needle threader (refer to Figure 6) or manually thread the needle from front to back.
- Pull about 6 inches of thread through the needle eye.
Operating Instructions
Stitch Selection
Turn the stitch selector dial to choose one of the 23 available stitches. Refer to the stitch chart on the machine for visual guidance. Adjust the stitch length and width dials as needed for your chosen stitch and fabric type.

Figure 7: Example of a decorative stitch being applied to fabric, demonstrating the machine's capabilities.
Basic Sewing
- Place your fabric under the presser foot.
- Lower the presser foot lever.
- Turn the handwheel towards you to lower the needle into the fabric at the starting point.
- Press the foot controller gently to begin sewing. Increase pressure for faster sewing.
- To reverse stitch (backtack), press and hold the reverse lever/button.
- When finished, raise the needle to its highest position, lift the presser foot, and pull the fabric away.
- Cut the threads using the thread cutter on the machine.

Figure 8: The Elna Explore 340s machine actively sewing a piece of fabric, set up in a home environment.
Automatic One-Step Buttonhole
- Attach the automatic buttonhole foot R.
- Place a button in the buttonhole foot's holder to measure the size.
- Select the buttonhole stitch pattern on the stitch selector dial.
- Pull down the buttonhole lever.
- Begin sewing. The machine will automatically sew the buttonhole to the correct size.
Free-Arm Sewing
To convert the machine to free-arm sewing, simply slide off the accessory storage box. This exposes the narrow free arm, ideal for sewing cuffs, sleeves, and other small, circular items.

Figure 9: The free arm of the Elna Explore 340s, exposed by removing the accessory tray, suitable for sewing cylindrical items.
Maintenance
Cleaning the Bobbin Area
- Always unplug the machine before cleaning.
- Remove the needle and presser foot.
- Remove the bobbin and bobbin case.
- Use the lint brush to remove any lint or dust from the bobbin area and feed dogs.
- Reassemble the bobbin case and bobbin.
Needle Replacement
- Always unplug the machine before replacing the needle.
- Loosen the needle clamp screw.
- Remove the old needle.
- Insert a new needle with the flat side facing the back of the machine, pushing it up as far as it will go.
- Tighten the needle clamp screw securely.
Note: Replace needles frequently, especially when sewing different fabric types or if the needle becomes dull or bent.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Skipped Stitches | Incorrect needle size/type, bent needle, improper threading. | Replace needle, re-thread machine, ensure correct needle for fabric. |
| Thread Breakage | Incorrect tension, poor quality thread, improperly wound bobbin, burr on needle plate. | Adjust tension, use good quality thread, re-wind bobbin, check for burrs. |
| Fabric Puckering | Incorrect tension, wrong stitch length, inappropriate presser foot pressure. | Adjust tension, increase stitch length, adjust presser foot pressure. |
| Machine Not Starting | Power cord not connected, foot controller not connected, power switch off. | Check all connections, ensure power switch is on. |
Specifications
- Model: Elna Explore 340s
- Dimensions (Product): 6.7 x 16.49 x 11 inches (D x W x H)
- Item Weight: 14.3 pounds
- Stitch Count: 23 built-in stitches
- Bobbin Type: Jam-proof, top-loading horizontal rotary hook
- Buttonhole: Automatic one-step
- Needle Threader: Built-in
- Free Arm: Yes
- Manufacturer: Elna
- UPC: 732212490507
Warranty and Support
For detailed warranty information, please refer to the warranty card included with your Elna Explore 340s sewing machine. Keep your proof of purchase for warranty claims.
For technical support, service, or to purchase genuine Elna parts and accessories, please visit the official Elna website or contact your authorized Elna dealer. Contact information can typically be found on the Elna website or in your product packaging.
Online Resources: www.elna.com





