Contact us

Solent Sewing Machines Ltd
Unit 5 & 10 Warrior Business Centre
Fitzherbert Road
Farlington
Portsmouth
PO6 1TX
UK

Monday – Thursday: 09:00 – 17:00
Friday: 09:00 – 14:00
Saturday – Sunday: Closed

shop@solentsew.co.uk

+44 (0)23 9232 5975

 

Please complete the form below, so we can provide quick and efficient service. If this is an urgent matter please contact Customer Support on +44 (0)23 9232 5975.

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We are based on the South coast of England, on the northern outskirts of Portsmouth. We are approximately 100km from Gatwick and Heathrow airports, 80km from Bournemouth airport and 35km from Southampton airport.

The following routes are recommended to reach us by road (not applicable for welding demonstrations):
- From London, Kent, East and North - from the M25 motorway travel South on the A3 / A3(M)
- From the South East (except Kent) - head West on the A27
- From the West - head East on the M27 / A27. 
- From M27 / A27 take the Farlington junction and head north toward Drayton & Farlington. At the traffic light (next to Sainsburys) turn right into Fitzherbert Road. The Warrior Business Centre is on the right hand side, Solent Sewing Machines is in unit 5.

Call us +44 (0)23 9232 5975, Mon - Thu: 9am - 5pm, Fri: 9am - 2pm

How a Sewing Machine Works

June 22, 2018

Have you ever wondered what was inside your sewing machine? If you were to take the casing off, you would find an intricate set up of shafts, gears and mechanics that all work together to make your sewing machine run. Today, we’re going to take an up-close look at the part of the sewing machine where all the magic happens, the needle and bobbin assemblies, to see how stitches are formed.

View of the needle on the downstroke. Shown without thread or bobbin

Creating a Lock Stitch

To understand how a stitch is made we’re going to take a look directly under the needle plate. Beneath the sewing machine’s needle is a bobbin, which is a small spool of thread. The bobbin sits in a shuttle that moves with the rhythm of the machine.

When you engage your sewing machine, the needle is pushed down through the fabric. Once the needle reaches its deepest level, it begins its ascent back through the fabric. As the needle begins to pull up, the friction of the needle against the fabric and thread forces the thread out one side of the needle creating a loop. The needle has a groove on one side, which allows the thread to slip without friction. Since the thread can slip on that side of the needle only one loop is created, on the opposite side of the groove. At this exact moment, a hook on the bobbin shuttle catches the loop of thread and interlocks it with the thread feeding off the bobbin. The two threads then interlock around the fabric pieces to create a lock stitch.

Some sewing machines, like the Sailrite Ultrafeed LS-1 & LSZ-1, have a walking presser foot. This walking foot mechanism helps to ensure that proper stitches are created. The walking foot is timed with the machine to help pull the fabric into position for needle puncture on the downstroke and to hold it in place through the upstroke. By holding the fabric in place as the needle rises the walking foot helps to ensure that a proper loop is created under the fabric.

Thread loop being hooked by the bobbin shuttle. Shown without bobbin thread

When Timing Goes Bad

This process requires exact timing within the machine’s movement to successfully create a stitch. When the timing in your sewing machine goes awry, it results in dropped stitches or other problems. If the hook reaches the loop too early or too late a stitch is not created. Similarly, as the needle rises, if the fabric is not secure against the machine it will rise with the needle and a loop won’t be formed.

If you experience dropped stitches with your sewing machine and you suspect timing issues, check your machine’s guidebook for more information. The Sailrite Ultrafeed Guidebook contains detailed troubleshooting solutions including how to reset your machine’s timing.

Learn more about Sailrite Sewing Machines, how they work, and all of their great features in our sewing machine category.

***text and images from Sailrite.com***