Question about Brother SE400 Computerized Sewing Machine
The metal ring sounds like the hook you are talking about.
Timing is only one of the issues you must also adjust the needle to hook clearance and needle bar height. The tip of the hook must pass above the eye of the needle in the scarf on the back of the needle without touching the needle. Who adjusted the timing and what did they do?
Posted on Oct 13, 2013
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Posted on Jan 02, 2017
First try taking your bobbin case right out of the machine (not sure if this model has a top loading or front loading bobbin, but your manual will help you here) and floss out the tension slot with a piece of strong thread. Don't use waxed dental floss, but non-waxed would work okay. (The bobbin case is the piece that the bobbin sits in.) Look around while you have the machine open and remove any fluff and thread you can see - TURN MACHINE OFF BEFORE DOING THIS! Replace bobbin case. Replace bobbin and make sure it "clicks" into the tension slot.
Then unthread the top of the machine, clean the tension disks by passing a folded dollar bill (or any paper money, depends on what country you are in) through the disks in the direction you thread the machine. Do this several times. Re-thread making sure you follow the correct thread path.
Make sure the needle plate is on firmly.
If after all that it still won't work, I'm sorry to say that it sounds like you have a misaligned needle bar. This commonly happens after you have a major thread snaffoo and needle breakage. The needle gets caught in the thread knot, pulls to the side and breaks but if it gets seriously caught it can pull the needle bar out of place. You cannot put the needle bar back in place yourself - it's a job for the workshop. Don't sew on your machine until it is fixed. The noise you are hearing is likely to be the needle striking against the needle plate or even the bobbin. Your timing will probably need re-setting too and this needs to be done by a qualified technician.
If you really need to sew before you can get your machine into the workshop, and if you can move the needle position on your machine by pressing a "sideways" button of some sort, you could try to get the needle in the centre yourself using this feature. This will not help if it is the timing that is the major problem.
Posted on May 03, 2009
When you open the front where the bobbin goes in, is the bobbin case spinning around loosley or is it fixed in position. It sounds as if it has not been put back in properly. Take it out and hold the spring clip which stops the bobbin falling out of the bobbincase. Hold it tight and put it oooover the spindle lining up the bit for the notch. Only let go when it is firmly in position. Also check your needle. Put in a new needle and make sure its in the correct way-it may be the needle which is the problem. If you took the "race" apart where the bobbin goes it may not be put back correctly and this could cause it-however-this is only the case if the flywheel won't turn.
Posted on Jun 12, 2009
1 - Flat side of the needle is facing the back of the machine.
2 - Threaded machine with the presser foot up - always.
3 - Bobbin thread is feeding from the spool in the correct direction and through the proper guides.
Lower and raise the threaded needle, holding onto the end of the thread.
If this does not pull the bobbin thread up, the timing may need adjusting.
There is a graphic for doing this as sewusa.com or take it into the dealer for service.
Posted on Mar 10, 2010
Timing this machine is not so easy but if U want to try... Remove the left bottom panel (one central screw), and look under. U will see by the rear the vertical gear making the hook turn. At the bottom of this gear, U will see a small allen. Slack this allen screw,
LEAVE A TENSION ON THE ALLEN SCREW: eitherway the hook will not follow the gear when U bring back the assembly to retight the allen screw.
U can now turn the hook on the gear, allowing to change the timming.
Send the needle completely down and when it come up, the point of the hook has to arrive at 2.5mm. on the top of the hole on the needle.
A TRICK : It might be easier to slighly change the position of the needle in the needle bar. Check the timing and try to correct it but lowering a little bit the needle before tightening the scew, or cut a little bit top part of the needle with a grinder.
Posted on Jul 07, 2012
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