Question about Brother LS-1217 Mechanical Sewing Machine

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Timing problem The problem started by loud metal sound like needle hit something, than machine stopped because of bunching threads underneath the fabric. It looks like the hook is not timed with the needle anymore: 1) The needle does not bring up the bobbin thread , 2) The hook does not catch the thread from the needle at all: The hook point passes the needle in the middle of the needle hole, when it should pass it just below the midpoint of the scarf on the back of the needle, what is above the hole of the needle, as I understand. Is it possible to adjust the rotation of the hook in this model of sewing machine? In older sewing machines this rotation adjustment was possible by loosening the three large set screws on the backside of the hook that secure it to the rotating shaft. What can be done for this model?

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  • Anonymous Aug 11, 2008

    the nnedle is going up before the thread catches from bobbin

  • Anonymous Mar 22, 2014

    machine hesitates when I step on the peddle (belt adjustment? wiring is fine). Also, tension and timing needs adjusting.

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You might have to look at loosening the set screws for the gear on the lower shaft that drives the hook driver gear . Loosen the screws, slide the gears apart, then adjust the hook so it is entering the scarf of the needle on the upstroke. Slide the gears togeather so they mesh again and it should be back in time. There are other factors though such as needle height adjustment which is done with the needle bar and hook and needle clearance (the distance between the needle and hook) which should be about .030. I'm a Bernina tech but many machines work the same principle. Good luck.

Posted on Aug 23, 2007

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2 Answers

The bobbin thread is bunching up


hi Lois.
this is all i could find out.
Check Your Tension Settings. Looping underneath the fabric usually occurs when there is not enough tension in the needle thread to pull the bobbin thread. Sometimes thread bunching can be caused by something as simple as the tension dial being inadvertently turn.
or try this link.
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or this one,
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if you go to this link a little window might open up in the middle of the page just close the little window down.
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not sure if this will help you...Check Your Tension Settings. Looping underneath the fabric usually occurs when there is not enough tension in the needle thread to pull the bobbin thread. Sometimesthread buching can be caused by something as simple as the tension dial being inadvertently turned.

WHY IS THREAD BUNCHING UNDERNEATH MY FABRIC ? ' eBay

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Thread on my consew 225 keeps balling the thread on the bottbottom


Sounds like bird nesting. The upper thread accumulates under the fabric creating a series of loops and knots.

First: Install a brand new needle and make sure it is installed facing the correct direction. (A new needle is the least expensive fix for most sewing machine issues.)

Second: Remove the thread. RAISE the presser foot and rethread from the beginning. Make sure it is threaded correctly (consult the owner's manual).

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How and Why to Bring up the Bobbin Thread

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Jan 21, 2014 - There are lots of reasons for sewing machine thread bunching up, and ... or bird nesting, on the top of your fabric, the culprit has something to do ... Frequent dusting underneath the throat plate and along the thread .... It looks like it's hardly been used but the top thread keeps tangling below the material.

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Top thread is bunching underneath


bunching underneath is an indication that the top tension is incorrect
switching projects and materials also that attention has to be given to tension adjustment both bottom and top
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I just bought it and its sounds like metal getting hit by the needle, and the thread bunches up underneath fabric.


if it is brand new then have it fixed under warranty
if used then it appears that the needle/bobbin timing is out with the needle hitting the bobbin carrier ot the hook hitting the needle.
bunching up of thread under the material is a sign of upper tension to light
suggest that you have a service done to fix it.

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Thread is knotting up on bottom of fabric causing it to stop


1.check the needle & see if it's bent--if so replace
2.lay the needle on a flat surface & roll the needle over if it doesn't roll true replace
3.check for blunt needle-if needle makes a popping sound when needle penetrates fabric
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1 Answer

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are you doing embroidery? if so turn off jump stitch cutting if possible. is the machine threaded correctly (pull needle thread out of machine and thread again with presser foot raised.

check for foreign matter in needle tension assembly. ensure there is sufficient needle thread tension.

the thread you see caught up underneath the fabric will be needle thread and indicates insufficient needle thread tension or something preventing the needle thread from being pulled up into the fabric (maybe a damaged bobbin case, or bobbin case position finger, or damaged needle plate hole).

goodluck,
scott

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Thread is bunching underneath fabric


Needle in correct? Be sure your bobbin is not in upside down and turning the wrong way. Possibly the hook that the bobbicase fits in/on has been hit by a needle and caused a burr that is catching the thread as it comes around. The burr would have to be polished off or hook replaced. The machine could be slightly out of time also.

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