Changed To Thicker Thread, Hell Broke Lose!

[Mel07971]

Hi I'm having similar issues with my brother ls2-b837

the bottom tension is all loose has anyone found the full manual online I can only find a blurry copy, I'd like images of how to thread the machine properly as I'm sure that's the cause of the problem?!! Here's an image of the underside of the fabric if you pull the thread it will unravel and slide right out

thanks 

Mel 

Edited October 27, 2016 by Mel07971

[Zambezi]

On 4/6/2015 at 9:10 PM, Christoffer said:

I've been sewing a lot, but only on others machines (industrial walkingfoots as well).

I picked up a Brother LS2-B837 the other day and changed from a thin cotton thread to a tkt 20 (tex 150) nylon thread.

It had a 130 needle, which would be about right accordingly to the thread brand (120-140). Seams to do well on the slide test. (Tried 120 and 140 as well)

At first I tried with original thread tension, but it broke the thread. I losened both top and bottom tension a little, the bottom so that the bobbin doesnt slide down holding it in the thread, but loose enough to slide a bit with a gentle "jojo move". I would say its on the looser end now.

The top tension I did loosen a lot, because the thread did not move at all, to a point where it falls off from the tension wheels.

By the moment it will curl the top thread, and do a lot of birdnesting. Ive tried all day, with my limited error searchings skills, and I'm not even close to make one normal stitch, feels like a needle in a haystack!

 

On 4/6/2015 at 9:10 PM, Christoffer said:

I've been sewing a lot, but only on others machines (industrial walkingfoots as well).

I picked up a Brother LS2-B837 the other day and changed from a thin cotton thread to a tkt 20 (tex 150) nylon thread.

It had a 130 needle, which would be about right accordingly to the thread brand (120-140). Seams to do well on the slide test. (Tried 120 and 140 as well)

At first I tried with original thread tension, but it broke the thread. I losened both top and bottom tension a little, the bottom so that the bobbin doesnt slide down holding it in the thread, but loose enough to slide a bit with a gentle "jojo move". I would say its on the looser end now.

The top tension I did loosen a lot, because the thread did not move at all, to a point where it falls off from the tension wheels.

By the moment it will curl the top thread, and do a lot of birdnesting. Ive tried all day, with my limited error searchings skills, and I'm not even close to make one normal stitch, feels like a needle in a haystack!

 

[Zambezi]

Hi,  I have had the same  problem and believe it to be the needle getting too hot and melting the artificial thread. I have always just increase the size of the needle and the problem has stopped.  But I will certainly look at the things I've learnt above. 

[brmax]

Looks like the thread at the check spring is not correct on the last try, and maybe the spring is set to high also.

This may have happened on the last break.

I would turn it by hand several / many stitches as it looks a bit like the typical not holding top thread back at startup, even though experienced operator.

Floyd