Thread the machine before you plug it in
Threading a sewing machine means passing thread through a series of guides and tension discs so the needle can catch it and form stitches. Every machine has a slightly different path, but the principle is the same: thread goes in at the top, down through guides, and finally through the needle eye from front to back.
Start with the presser foot (the metal piece that holds fabric down) in the up position — this opens the tension discs and lets thread pass through. Raise the needle to its highest point by turning the handwheel toward you. Place your spool of thread on the spool pin at the top of the machine, then follow the threading diagram printed on your machine's body or in the manual. Thread guides are usually marked with arrows or numbers. Pull thread firmly through each one, then through the needle from front to back. Leave a 6-inch tail hanging below the needle.
If you thread with the presser foot down, the tension discs stay closed and thread cannot pass through — this is the most common threading mistake. If stitches look loopy or uneven after you start sewing, rethread the entire machine rather than guessing which step went wrong.
Key Takeaways
- Thread the machine with the presser foot up and needle at its highest point, following the diagram on your machine's body.
- Wind a bobbin (the small spool that holds thread underneath) before you start, or use a pre-wound bobbin if your machine accepts them.
- Load the bobbin into the bobbin case, pull up the needle thread to catch the bobbin thread, and you are ready to sew.
- Start sewing slowly by turning the handwheel by hand for the first few stitches, then use the foot pedal once you have control.
- Backstitch at the start and end of every seam to lock stitches in place so they do not unravel.
Wind and load the bobbin
The bobbin is a small spool that holds thread underneath the fabric. Most machines come with empty bobbins you fill yourself, though some newer machines use pre-wound bobbins you buy ready-made. Check your manual to see which type your machine uses.
To wind a bobbin on a basic machine, place an empty bobbin on the bobbin winder (a small spindle, usually on the top or side of the machine). Pull thread from your spool through a tension guide on the winder, then wrap it around the bobbin a few times by hand. Press the bobbin winder against the machine's wheel or engage the winder clutch — the exact method depends on your model. Turn the handwheel or press the foot pedal slowly. The bobbin will fill automatically. When it is full, the winder stops or disengages. Cut the thread and remove the bobbin.
Insert the full bobbin into the bobbin case (a small metal or plastic holder that sits under the needle plate). The bobbin case is usually accessed by removing a cover or opening a hinged door on the front of the machine. Thread the bobbin thread through the tension spring on the case, then close the case and replace the cover.
Bring up the bobbin thread before you sew
Before you start sewing, you need to pull the bobbin thread up through the needle plate so both threads are ready. Hold the needle thread in your left hand. Turn the handwheel toward you (one full rotation) so the needle goes down and comes back up. As the needle rises, it will catch the bobbin thread and pull a loop to the surface.
Gently pull the needle thread to bring the bobbin thread loop all the way up through the needle plate. You should now have two thread tails — one from the needle and one from the bobbin — hanging below the presser foot. Pull both tails to the back and to the right, away from the needle. This step prevents thread tangles and broken needles when you start sewing.
Position fabric and lower the presser foot
Place your fabric under the presser foot with the edge aligned to a seam guide (the marked lines on the needle plate that show how far from the needle you are sewing). For a standard seam, align the fabric edge to the half-inch line. Lower the presser foot by pushing down the lever behind it — the foot must be down or stitches will not form.
Hold both thread tails loosely in your left hand as you begin. Do not pull them hard or you may bend the needle. Position your hands so your fingers are a few inches away from the needle and you can guide the fabric without getting close to the needle path.
Sew slowly at first, then use the foot pedal
Turn the handwheel toward you by hand for the first three or four stitches. This gives you control and lets you see whether the machine is forming stitches correctly. If the needle is hitting the presser foot or fabric is bunching, stop and check your threading and bobbin before continuing.
Once the first few stitches are down, release the handwheel and rest your foot lightly on the pedal. The machine will sew as long as you press the pedal — the harder you press, the faster it sews. Start slowly and increase speed as you gain control. Guide the fabric gently with your hands; do not force it through or you may break the needle or bend it out of alignment.
To stop sewing, lift your foot off the pedal. Raise the presser foot lever to release the fabric. Raise the needle to its highest point by turning the handwheel, then pull the fabric away from the needle. Leave thread tails 4 to 6 inches long so you can tie them off or trim them later.
Backstitch to lock seams
A backstitch is a few stitches sewn in reverse at the start and end of a seam. It locks the thread in place so the seam does not unravel when you wash or wear the garment. Most machines have a backstitch button or lever near the needle — press or hold it while sewing to reverse direction.
At the start of a seam, sew forward three or four stitches, then press the backstitch button and sew backward over those same stitches. Release the button and continue sewing forward. At the end of the seam, sew forward to the edge, then backstitch three or four stitches. Raise the presser foot and remove the fabric. Trim the thread tails close to the fabric.
Adjust stitch length and tension if stitches look wrong
Stitch length is how far the fabric moves forward with each stitch. Most machines have a dial or lever marked with numbers — a setting of 2 to 2.5 is standard for most fabrics. Shorter stitches (1 to 1.5) are better for delicate fabrics or detailed work. Longer stitches (3 to 4) work for heavy fabrics or basting (temporary stitching). Turn the dial before you start sewing; changing it mid-seam can break the needle.
Tension controls how tight the thread is pulled. If the top thread is too loose, stitches look loopy on the bottom. If it is too tight, stitches look loopy on top or the thread breaks. Most machines have a tension dial numbered 0 to 9, with 5 as the default. If stitches look wrong, rethread the machine first — bad threading causes most tension problems. If stitches still look wrong after rethreading, turn the tension dial one number at a time and test on scrap fabric until stitches look even on both sides.
Frequently Asked Questions
What do I do if the needle breaks?
Stop sewing when ready and raise the presser foot. Remove the broken needle by loosening the needle clamp (the small screw or lever that holds the needle in place). Insert a new needle of the same size and type, making sure it is fully seated in the clamp. Rethread the machine and test on scrap fabric before continuing your project.
Why is thread bunching under the fabric?
Bunching usually means the bobbin is not threaded correctly through the tension spring, or the needle thread is not threaded all the way through the needle eye. Remove the bobbin case and rethread the bobbin thread through the tension spring. Rethread the needle, making sure thread passes through every guide and goes through the needle from front to back. Test on scrap fabric.
Can I sew different types of fabric on the same machine?
Yes, but you may need to change the needle and stitch length. Use a ballpoint needle for knits, a universal needle for most woven fabrics, and a heavy-duty needle for denim or canvas. Lighter fabrics like silk or cotton voile need a shorter stitch length (1.5 to 2) to prevent puckering. Heavier fabrics can use a longer stitch (2.5 to 3). Always test on scrap fabric first.
How do I know if my needle is dull or bent?
A dull or bent needle causes skipped stitches, broken thread, or fabric damage. Remove the needle and hold it up to the light, looking down the shaft. A bent needle is obvious. A dull needle may look fine but will not pierce fabric cleanly. If stitches look wrong and rethreading does not fix it, replace the needle. Needles are inexpensive and wear out with use.
What is the difference between a straight stitch and other stitch types?
A straight stitch goes forward and backward in a line and is the most basic stitch for seaming fabric. Other stitches like zigzag, stretch, or decorative stitches are selected using a dial or screen on your machine. For learning, stick to straight stitch. Once you are comfortable with threading, loading the bobbin, and guiding fabric, you can explore other stitches in your manual.