Wind your bobbin by placing thread on the spool pin, threading through the tension disc, and running the bobbin winder until it stops

A bobbin is the small spool that holds thread underneath your fabric while you sew. On a Janome machine, winding a bobbin takes about two to three minutes and uses the same thread you'll use on top. The process is straightforward once you know where each part goes and in what order to thread the machine.

You'll need an empty bobbin (plastic or metal, depending on your Janome model), a spool of thread, and your machine. Most Janome machines come with several bobbins in the accessory box. If you've lost yours, Janome bobbins are inexpensive and widely available online or at fabric stores.

Key Takeaways

  • Place the thread spool on the spool pin at the top of your machine, with the spool cap holding it in place.
  • Thread the bobbin winder by running thread through the tension disc and then wrapping it around the bobbin three times by hand.
  • Snap the bobbin onto the bobbin winder spindle and press the foot pedal or button until the bobbin stops automatically.
  • Cut the thread and remove the bobbin when the winder shuts off — do not force it or try to stop it mid-wind.
  • Wind a fresh bobbin before you start sewing, not during a project, so you have a backup ready.

Set up the spool and thread path

Start with your machine unplugged or the power switch in the off position. Place an empty bobbin to the side for now — you'll attach it in the next step. Take your spool of thread and slide it onto the spool pin, which is the vertical metal rod at the top left of your machine (on most Janome models). The spool should sit flat against the machine, not tilted.

Place the spool cap (a small metal or plastic disc) over the end of the spool pin to hold the spool in place. The cap should fit snugly but not so tight that you can't remove it later. Now bring the thread down and to the right, toward the bobbin winding area. You'll see a small metal or plastic disc with a slot or notch — this is the tension disc for bobbin winding. Thread the end of your thread through this disc. The thread should sit in the slot, not just rest on top of it.

Attach the bobbin and wrap the thread

Look for the bobbin winder spindle, a small rod that sticks out from the right side of your machine (the exact location varies by Janome model, but it's always near the bobbin winding area). Pick up your empty bobbin and slide it onto this spindle. The bobbin should sit flat and centered on the spindle, with the thread hole facing toward you.

Now take the thread that's already threaded through the tension disc and wrap it around the bobbin three times by hand, going around the bobbin's edge. After the third wrap, hold the thread end loosely in your hand. This wrapping prevents the thread from slipping when the bobbin starts to spin. Do not pull the thread tight — just wrap it gently so it sits on the bobbin's surface.

Start the bobbin winder

On most Janome machines, there's a small lever or button next to the bobbin winder spindle. Push this lever or button to engage the bobbin winder. At the same time, press the foot pedal down slowly, or press the start button if your machine has one (some newer Janome models have an electronic start button instead of a foot pedal). The bobbin will begin to spin.

As the bobbin spins, the thread will wind onto it automatically. Keep your hand near the thread end for the first few seconds — if the thread slips, you can guide it back onto the bobbin. Once the thread is winding smoothly and evenly, you can let go. The bobbin will fill gradually, and you'll see the thread building up in neat layers.

Know when the bobbin is full

Most Janome machines have an automatic bobbin winder stop. When the bobbin reaches the right fullness, a small lever or sensor will trigger, and the winder will shut off on its own. You'll hear a slight click or feel the machine stop. This usually happens in two to three minutes, depending on how fast you're pressing the foot pedal.

Do not try to stop the winder by hand or force the bobbin off the spindle while it's still spinning. Wait for the machine to stop completely. If the winder doesn't stop after three minutes, your machine may not have an automatic stop, or the stop mechanism may need adjustment — check your machine's manual for your specific model.

Remove the bobbin and trim the thread

Once the winder has stopped, press the lever or button again to disengage the bobbin winder. Gently slide the full bobbin off the spindle. Take a pair of scissors or thread snips and cut the thread close to the bobbin, leaving a short tail (about one inch) sticking out. This tail helps you pull the thread up through the bobbin case later when you're ready to sew.

If you wrapped the thread around the bobbin by hand at the start, you may see a loose end of thread still attached to the bobbin winder spindle. Cut this off as well. Your bobbin is now ready to insert into the bobbin case.

Common mistakes to avoid

The most common error is threading the bobbin winder without going through the tension disc. If you skip this step, the thread will wind too loosely, and your bobbin will not have enough thread on it. Always thread through the tension disc first, even though it's straightforward to miss.

Another mistake is wrapping the thread around the bobbin too many times or too tightly before you start winding. Three loose wraps is the standard — more than that can cause the thread to bunch up or slip. If you wrap it too tight, the thread may break when the bobbin starts to spin.

Do not try to stop the bobbin winder by hand or pull the bobbin off while it's spinning. This can break the thread, damage the winder mechanism, or cause the bobbin to wind unevenly. Always wait for the automatic stop, or turn off the machine if the stop doesn't engage.

Frequently Asked Questions

Can I use the same bobbin over and over?

Yes. Janome bobbins are reusable. When a bobbin runs out of thread during sewing, you wind it again with fresh thread. Over time, bobbins can wear out or crack, especially if they're dropped or exposed to heat. If a bobbin looks damaged or warped, replace it with a new one.

What if my thread keeps slipping off the bobbin while I'm winding?

This usually means the thread is not threaded through the tension disc, or it's not wrapped around the bobbin enough times at the start. Stop the machine, rethread through the tension disc, wrap the thread around the bobbin three times, and try again. Make sure the thread sits in the tension disc slot, not just resting on top of it.

How many bobbins should I wind before I start sewing?

Wind at least one bobbin before you begin a project. If you're sewing for more than an hour or using a lot of thread, wind two or three bobbins so you have backups ready. This saves you from having to stop and wind mid-project.

Do I need to use the same thread color on the bobbin as on top?

You can use the same color or a different one, depending on your project. For most sewing, matching thread colors looks best. If you're sewing a seam that will be hidden, you can use any color on the bobbin. Just make sure the thread weight and fiber match — do not mix heavy thread on top with thin thread on the bobbin.

What if my Janome machine doesn't have an automatic bobbin stop?

Older Janome models may not have an automatic stop. In that case, watch the bobbin as it fills. When it looks full (the thread should reach near the top edge of the bobbin), turn off the machine or release the foot pedal. Cut the thread and remove the bobbin. It takes practice to judge the right fullness, so wind a test bobbin first if you're unsure.