Thread your machine and wind a bobbin first

Before you sew anything, your machine needs thread on top and a wound bobbin underneath. The bobbin is a small spool that holds thread in the lower part of the machine. Most machines come with at least one bobbin and a bobbin winder — a spindle that spins thread onto the bobbin quickly.

To wind a bobbin, place an empty bobbin on the winder spindle (usually on the right side of your machine), thread the end through a tension disc on the winder, and press the foot pedal or press a button — this varies by machine. Wind until the bobbin is full and the machine stops automatically. Then remove it and trim the thread tail.

Next, thread the top of the machine. Raise the presser foot (the metal piece that holds fabric down) — this opens the tension discs so thread can pass through. Follow the thread path marked on your machine: usually down from the spool, through guides, through the tension discs, and down toward the needle. Thread the needle from front to back, then pull both the top thread and bobbin thread toward the back of the machine. You are now ready to sew.

Key Takeaways

  • Wind a bobbin with the bobbin winder before threading the machine, and always raise the presser foot before threading the top thread.
  • Thread the machine by following the marked path on your machine, then thread the needle from front to back and pull both threads toward the back.
  • Set your stitch length to 2.5 millimeters for a standard seam, and test on scrap fabric before sewing your project.
  • Hold both threads behind the presser foot as you start, and guide fabric with your hands rather than pushing it into the needle.
  • Backstitch at the start and end of every seam to lock the stitches so they do not unravel.

Insert the needle and set your stitch length

The needle is the most important part of your machine — a bent or dull needle will skip stitches, break thread, or damage fabric. Needles come in different sizes and types. For most beginners, a size 80/12 universal needle works for light cotton and quilting cotton. If you are sewing heavier fabric like denim, use a size 90/14 or 100/16.

To insert the needle, lower the presser foot, then loosen the needle clamp (a small screw on the side of the needle holder). Insert the needle flat side facing the correct direction — check your manual, as this varies by machine brand. Push it up as far as it will go and tighten the clamp. A needle inserted backward or too low will not pick up the bobbin thread.

Now set your stitch length. Most machines have a dial or digital display. A stitch length of 2.5 millimeters is standard for everyday sewing. Shorter stitches (1.5 to 2 millimeters) are stronger and work for seams that take stress. Longer stitches (3 to 4 millimeters) are faster and work for basting or temporary seams. Start with 2.5 and adjust once you see how your machine sews.

Test your tension and practice on scrap fabric

Tension controls how tight or loose your stitches are. If the top thread is too tight, it will pull the bobbin thread to the surface and pucker the fabric. If it is too loose, the seam will be weak and thread will hang in loops underneath. Most machines have a tension dial numbered from 0 to 9, with 4 or 5 as the default starting point.

Before sewing your project, sew a test seam on two pieces of scrap fabric the same weight as your project. Sew a straight line for about 4 inches. Look at both sides of the seam. The stitches should look the same on top and bottom — a balanced line of thread with no loops or puckering. If the top thread is loose, turn the tension dial up slightly (toward 6 or 7). If the bobbin thread is showing on top, turn it down (toward 2 or 3). Test again after each adjustment.

Once the tension looks right, practice sewing straight lines on scrap fabric. Sew slowly using the foot pedal — do not rush. Your hands should guide the fabric gently; the machine feeds it automatically. You are learning the feel of the pedal and how the machine moves fabric, not pushing it through.

Position fabric and backstitch to lock your seam

Place two pieces of fabric under the presser foot with the edges you want to join aligned. Lower the presser foot — this engages the tension discs and holds the fabric in place. Hold both the top thread and bobbin thread behind the foot with your left hand, and use your right hand to guide the fabric as it feeds.

Press the foot pedal slowly to start sewing. The needle will go down and come back up, picking up the bobbin thread and forming a stitch. Keep the fabric moving straight and at a steady pace. If you need to stop, raise the presser foot and the needle will stay in the fabric so you can reposition.

At the start and end of every seam, backstitch to lock the stitches. To backstitch, sew forward about half an inch, then press the reverse button (or lever) and sew backward over the same stitches for half an inch. Then release reverse and sew forward again. This locks the thread so it cannot unravel when you wash or wear the garment. Do the same at the end of the seam.

Trim threads and remove fabric without breaking the needle

When you reach the end of your seam, raise the presser foot and the needle. Pull the fabric away from the machine toward you — do not pull to the side, as this can bend the needle. Trim the thread tails with scissors, leaving about 4 inches so you can tie them off if needed, or trim closer if you backstitched (backstitching usually holds without tying).

If you need to remove fabric before reaching the end of a seam, always raise the presser foot first. Lowering the presser foot disengages the tension discs and allows you to pull fabric out without breaking the needle or thread. Many beginners forget this step and snap needles by yanking fabric while the foot is still down.

Troubleshoot common problems on your first seams

If your needle breaks, stop when ready and replace it. A broken needle usually means it was inserted backward, inserted too low, or the fabric was pulled while the presser foot was down. Check the insertion and try again.

If stitches are skipped (the needle misses picking up thread), the needle may be bent, dull, or inserted incorrectly. Replace it with a fresh needle and re-thread the machine. Skipped stitches can also mean the top thread is not fully seated in the tension discs — raise the presser foot and re-thread from the spool.

If thread breaks while you are sewing, stop and check the bobbin — it may be empty or wound unevenly. Also check that the presser foot is raised before threading; if you thread with the foot down, the thread will not seat in the tension discs. If the top thread keeps breaking, the needle may be bent or the thread may be old and brittle.

If fabric puckers or the seam is wavy, your tension is too tight or your stitch length is too short for the fabric weight. Loosen the tension slightly and increase stitch length, then test on scrap fabric again.

Know when to call a repair person

If your machine does not pick up the bobbin thread no matter how many times you re-thread, or if it makes a grinding noise, the machine may need professional service. Repair shops can clean the bobbin area, replace worn parts, and adjust tension mechanisms that cannot be fixed by the user. Most repairs cost between $50 and $150, depending on what is wrong.

If you have an older machine that belonged to a family member or came from a thrift store, a repair person can service it before you start sewing. A basic cleaning and tension check takes about an hour and is worth the cost if you plan to use the machine regularly.

Frequently Asked Questions

What size needle should I use for my fabric?

Size 80/12 universal needles work for most light to medium fabrics like cotton and linen. Use size 90/14 for heavier fabrics like denim or canvas, and size 70/10 for very thin fabrics like silk or lightweight cotton. The first number is the metric size; the second is the American size. Check your fabric weight and choose accordingly.

Why does my thread keep breaking?

Thread breaks most often because the presser foot was down when you threaded the machine, so the thread did not seat in the tension discs. Raise the foot and re-thread from the spool. If it still breaks, the needle may be bent or dull — replace it. Old thread can also break; if your thread is more than a few years old, buy new thread and try again.

How tight should my tension be?

Tension should be tight enough that stitches look the same on both sides of the fabric with no loops or puckering. Most machines start at 4 or 5 on the dial. Test on scrap fabric and adjust up or down by half a number at a time until the seam looks balanced. Write down the number that works for your fabric so you can return to it.

Can I sew without backstitching?

You can, but backstitching locks the thread so it will not unravel when washed or worn. For practice seams on scrap fabric, backstitching is not necessary. For any seam on a finished project, backstitch at both the start and end. It takes only a few seconds and makes your seams much more durable.

What should I do if the fabric is not feeding straight?

Guide the fabric gently with your hands, but do not push it — the machine feeds automatically. If fabric is pulling to one side, check that the presser foot is fully lowered and that you are not pulling the fabric sideways. If the problem continues, the feed dogs (the metal teeth under the presser foot) may need cleaning. Raise the presser foot, use a small brush to remove lint and dust, and try again.