Tensions are out on my overlocker.

Quite often tension issues on overlockers especially new machines are simply down to the machine having been miss-threaded.

For a newer overlocker, or where the user is classed as a learner!

When threading an overlocker always make sure that the threads are passed between the tension disks. Quite a common occurrence is when the tension disks are missed and the thread is passed on either side of them, this is especially common on overlockers where the tension disks are located at the very top of the machine and only a small amount of the tension unit can be seen.

1. Lift the presser foot using the foot lifter. On some overlockers, this action releases pressure between the tension discs, which in turn allows the threads to find the correct threading paths between the tension discs.

2. Keep the thread taught while threading.

3. Double check all the threads have been correctly placed over/under the guides, of wire guide loops.

4. Always take your time threading a machine especially if it is new and you are unfamiliar with its function and always refer to the user manual.

For more experienced users, where in the past the overlocker has been working fine, then suddenly a tension problem occurs.

1. Rethread the machine with different coloured threads. This will make viewing the overlock stitch easier to fathom out which thread tension relates to the complex 4-thread overedge stitch.

2. Tweek the tensions, some overlockers require 1, 2 or 3 numbered rotations on the tension dial, while others need only 1/4 to 1/2 rotation between numbers on the dials. Only adjust one tension/thread at a time, then sew test.

3. Tip: To balance the overlock stitch, It's best to start by adjusting the thread tension to a lower setting, rather than setting the tension higher. For example, if needle 2 and looper 3 are unbalanced. Needle 2 is pulling looper 3 thread to the top fabric side: Lower the tension of needle 2 first, before tightening looper 3 tension.

Other things to look out for:

1. Start by using brand new needles of the correct type and size 12/80 is a good starting point.

2. Overlock loopers do snap, but ofter loopers can bend!

3. If the needle guides under the needle plate are slightly bent, this can cause issues.

4. Check the needle plate for damage, the tongue ofter becomes damaged. Some models have the tongue built into the presser foot. This needs to be a perfectly smooth surface.

5. Last, but not least important is the selected thread choice! The wrong type of thread can cause tension issues. Imagine using a different thread brand or type on one or more needles or loopers, It may have a different thickness, and cheaper threads may even have variable thickness! Hold your thread strand up to the light, a hairy will not allow the overlocker tensions to control the tightness and it will give an uneven stitch. Some threads stretch more than others. Using a good-quality overlocking thread can make tension problems disappear.