How to thread - Necchi 4575 Mechanical Sewing Machine

Is that a Bernina? Which model?

Usually, if you are experiencing improper stitching and/or broken threads, it's most often a mis-threading problem. Proper threading is EXTREMELY important to successful serging.

Remove all the thread from the machine. Use colored threads that match the machine diagrams.

ALWAYS RAISE the presser foot when threading!

Thread each thread in the ORDER specified. Usually, Upper looper first, then Lower looper, then needles.

When threading each, grasp the thread below the thread tree and below the tension dial, and give it a tug to seat the thread completely. Sometimes it will pop when it seats. If the stitching has loose looping threads, most likely the thread is not seated completely.

Verify the thread path is correct for each thread before going on to the next thread.

The best tension setting is the midway point--usually marked on the dial. Then the tensions are tweaked following testing. The colored threads will help you determine which thread is misbehaving.

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Most often, it is misthreading. Remove all the threads from the machine. Then rethread each thread in the order specified and verify the thread path is correct for each. Also, when threading the tension mechanism, give each thread an extra little tug to make sure the thread is seated completely.

Oh yes, very IMPORTANT. Always raise the presser foot when threading the machine!!!

FWIW, when a thread breaks, trying to rethread that one thread will not resolve the issue because it is being threaded out of order. If rethreading the one thread doesn't work the first time, just bite the bullet and rethread every thread.

The other possibilities are the tension is too tight, poor quality thread, or a burr somewhere in the threading process of that thread is snagging the thread.

Third thread--is that the upper looper? Remove all the threads from the machine. Clip them below the thread tree, RAISE the presser foot, and then pull all 4 threads down through the needle. (Never Pull Up!!)

ALWAYS RAISE the presser foot.
Rethread beginning with the Upper Looper, then Lower Looper, then the needles. Be sure to ALWAYS thread in this order!! (On most newer machines, when threading the Lower Looper, always finish with the Lower Looper "draped" over the top of the Upper Looper.)

If a thread breaks, remove the threads and start over from the beginning as trying to fish a thread through the existing threads very SELDOM works.

Verify each thread path is correct.

When threading each thread and to insure the threads are seated in the tensioners, give each thread an extra little tug when going through the tension disk.

Be sure to oil your machine frequently to keep it operating smoothly!

Make It Handmade Threading Your Serger or Overlocker

Serger threads Threads Magazine Gatherings Forum Sewing Questions Answers

The 335 has a two thread chain stitch (stitch type 401), and the overlock side (right needle side), is a three thread plain overlock. If you are describing the plain overlock as the problem, I would first suggest the following in re-threading:

1. Thread the upper looper
2. Thread the lower looper
3. Thread the needle last (important)

If the needle threaded, you cannot re-thread the lower looper without breaking the thread.
In order to thread the lower looper, the lower looper must pass by the needle thus picking up the needle thread. So, instead of threading the lower looper thread underneath the needle thread, the looper would be threaded on top and cannot sew without breaking the thread.
Make sure that the threads are bedded between the tension disks. Check this by stretching the thread fore and aft of the tension disks as well as visually noting that the threads are not accidentally threaded behind the disks. You can also loosen the tension disks when threading so as to allow the threads to bed deeply between the disks.
Please reply with your observations.

rethread machine, make sure u thread all steps

Thread breakage occurs commonly with mis-threading. Be sure to ALWAYS RAISE the presser foot when threading the top thread. Also, since you are using 2 threads, thread one completely and then thread the other so the threads do not get twisted in the thread path. If your machine has duel tension disks, thread each tension disk separately with a single thread. Setting the thread spools to turn opposite directions may help.

Also, make sure the needle eye is the right size for the thread. Thick or thin thread could break easily in the wrong needle.

Also, use only good quality thread--no bargain bin or old threads!

twin needle thread breakage Google Search

Hello

Place spool of thread on the spool pin, found inside the carrying handle on the top right side of the machine facing the back.

Lead thread through the upper thread guide, located just beyond the machine's handle.


Lead thread through the second upper thread guide, found a few spaces to the left of the first upper thread guide mentioned in Step 2.

Bring thread around the second upper thread guide down into the thread guide.


Lead thread toward you down through the tension discs.

Continue to pull thread down through the ****. Forming a "U" shape, bring thread back up the left side of the guide, catching the check spring as the thread moves back up through the guide on the left side.

Bring thread up to the take-up lever and insert thread through the eye of the lever in a right-to-left motion.

Lead thread downwards, slipping it down through the horizontal thread guide.

Guide thread through the wire thread guide that is attached to the needle clamp.

Insert thread through needle from front to back, pulling thread four to six inches to create a thread extension. The machine is now threaded.

Hello

Place spool of thread on the spool pin, found inside the carrying handle on the top right side of the machine facing the back.


Lead thread through the upper thread guide, located just beyond the machine's handle.


Lead thread through the second upper thread guide, found a few spaces to the left of the first upper thread guide mentioned in Step 2.


Bring thread around the second upper thread guide down into the thread guide.


Lead thread toward you down through the tension discs.


Continue to pull thread down through the ****. Forming a "U" shape, bring thread back up the left side of the guide, catching the check spring as the thread moves back up through the guide on the left side.


Bring thread up to the take-up lever and insert thread through the eye of the lever in a right-to-left motion.


Lead thread downwards, slipping it down through the horizontal thread guide.


Guide thread through the wire thread guide that is attached to the needle clamp.


Insert thread through needle from front to back, pulling thread four to six inches to create a thread extension. The machine is now threaded.

Clean out the bobbin area.

Thread the machine with the presser foot up. This opens the tension so the thread can enter. Threading with the foot down closes the tension and the thread cannot enter as it should. When you sew, the top thread is loose and cannot properly connect with the bobbin thread to form a tight stitch. The stitching does not hold and pulls right out.

Thread breakage - top thread? Check the thread spool to be sure there aren't any nicks to catch the thread.

When the thread breaks, check the spool pin to see if the thread is unwinding too fast and wrapping around the pin. Thread nets can help stop this. You can find them at sewing machine dealers.

Solution taken from "Handbook for Huskylock Sewing Machine Models 1001L/1000L/1000"

1. Raise the presser foot by using presser foot lever. When the presser foot is raised, the two thread tension discs in the thread tension control panel are released so that thread passes freely between them. Otherwise thread tension may not be correct.

Important! When threading the needle, always be sure to lift the presser foot lever, and also take care to thread in the proper order.

Threading order:
1. Upper looper thread (green)
2. Lower looper thread (blue)
3. Double chain stitch looper thread (purple) in case of 5 thread stitch or double chain stitch
4. Right needle thread (red)
5. Left needle thread or double chain needle thread (yellow)

Caution!
Because the left thread tension dial (yellow) is used for either the left needle or the double chain stitch needle, these needles will never be used at the same time.

Upper looper (green) sequence:
1. Thread holder (silver triangle openings attached to thread holder stand)
2. Thread guide (flat silver clips just behind thread tension disc)
3. Thread tension disc (circular knobs with numbers for tension setting)
4. Pull thread around upper looper guide and upper looper
5. Pull thread into hole of upper looper

Lower looper (blue)
Repeat 1, 2, 3.
4. Pull thread around guide (see color coded chart inside front serger cover).

Easy threading mechanism (for lower looper)
1. Pull out the lower looper threading lever
2. Thread the lower looper and position the thread on hook of the lower looper
threading lever.
3. Push the lower looper threading lever back to its basic position while
holding the end of the thread.

Caution:
When returning the lower looper threading lever, always make sure that the two
blue triangle marks (directional arrows) meet each other.

Right needle thread (red)
Left needle thread (yellow)
Important: Thread the needles after threading of lower looper and upper looper.
First raise the presser foot lever, and then thread the needle threads in order shown in color coded thread guide.