How to connect thread to 91k5, 91k6

[Wizcrafts]

13 hours ago, ddiuni said:

There is no manual, and I have no idea why sewing is not working.

These are the main causes of a failure to sew:

• The top thread is not going through the top tensioner, the check spring, all thread guides and especially - the take-up lever.
• If the top thread doesn't go through the take-up lever you cannot pull up a stitch.
• Make sure the needle is threaded from the rib side to the scarf side.
• The needle isn't aligned so the scarf faces the hook. Identify where the point of the hook is and aim the scarf in the needle to face it.
• The hook to needle timing is out. The hook is usually timed to intersect the needle after it has lifted from bottom dead center about 3/32 inch, at 1/16 inch above the top of  the eye. If the top thread path is correct, there will be a nice loop formed at pick-off time.
• The bottom thread isn't set right. Your machine is much different than any other I've ever seen. If the bottom thread missed going through or around some moving part the top thread can't pick it up on the upstroke. Since your machine's bobbin, or bottom thread is far below the usual location, it must rely upon coming up to the top, then feeding inside a revolving shuttle that has a tension spring, then out of that spring.

[ddiuni]

59 minutes ago, Wizcrafts said:

 

• 스카프가 후크를 향하도록 바늘이 정렬되지 않았습니다. 고리의 끝이 어디인지 확인하고 스카프가 바늘을 향하도록 합니다.

Let's check them one by one.
Today, I accidentally changed my mind and changed the position of the needle.
I put the needle so that the scarf is on the right side so that the thread goes from left to right.
Then, it becomes sewing, but the upper thread clumps toward the lower thread.
(For 91k5,6, the needle must be inserted so that the groove is on the left and the scarf is on the right. Is that correct?)
Maybe the timing isn't right.
Let's do it slowly, one by one, as described.

[RockyAussie]

2 hours ago, ddiuni said:

Then, it becomes sewing, but the upper thread clumps toward the lower thread.

Show a picture please. It may be just needing tighter top tension or it may be too tight down below for some reason.

[ddiuni]

On 2021. 11. 17. at 오전 11시 24분, RockyAussie said:

사진을 보여주세요. 상단 장력이 더 필요하거나 어떤 이유로 아래가 너무 조일 수 있습니다.

 

[ddiuni]

The photos from #13 are photos taken with the thread slightly pulled upwards.
Seeing that the upper thread clumps at the bottom, something is wrong, but I don't know where it is.

[Wizcrafts]

I have yet to single a photo of the top of the machine where the top tension and take-up mechanism resides. A thousand photos of the needle and throat plate won't help if there is something wrong up above them on top of the head. Let's see how the machine is threaded ON TOP. I mean, the top of the machine, where the top thread goes through tensioners, springs and guides, then through the take-up lever. Show us those areas, please.

[ddiuni]

[ddiuni]

[RockyAussie]

Pictures are very blurry and hard to make out. I can not see a thread return spring nor a thread take up lever. From the angle of the last photo above could you take a picture with the needle down then one with the needle 1/2 way up? Do not reduce the photo size quite so much.

[Wizcrafts]

No take-up lever!