Question about Sewing Machines
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Posted on Jan 02, 2017
it might be possible that screw pulled away due to the vibration as it became loose and after working the machinary it did like this.
so try after tighting it properly.
dont rate it until it satisfies u
Posted on Sep 25, 2008
it sounds like the needle hook timing is out. You need to get the needle in the lowest position and measure the gap from the needle to the hook point on the bobbin shuttle. It should be 1/4". You will need to remove the foot and foot plate to be able to see. I use a 1/4" drill bit as a gauge. If you need to adjust it, you will need to remove the free arm cover to the right of the foot and loosen the 2 allen head screws that hold the drive gear. Adjust the gap, tighten the screws and retry. Usually if the needle catches the thread to early, it will make a bad stitch and the upper thread will break. If it catches to late, it will make thread loops and the machine will skip stitches. Good luck, these are a good machine and worth fixing. Phil
Posted on Nov 13, 2008
SOURCE: thread or bobbin tension
Thread tension. Beware of adjusting the bobbin screw. Pfaffs maintain their tensions just fine without adjusting the bobbin tension, unless you're using some crazy thick or fine thread. If you must change your bobbin tension, you would be well-advised to buy an extra bobbin case, because re-calibrating your tensions after changing them can be less than fun.
Increase your top tension, and your looping should cease. I normally keep my tension around 4.5. Also make sure you're using a good quality thread, and that there's nothing in the upper tension assemblies. Sometimes a tiny piece of debris can keep the top tension from applying enough tension, so turning the machine off and blowing some canned air in there can help as well.
Posted on Mar 11, 2009
it sounds like the thred tenshion is to loos or the timing has sliped a little and its off a bit this can also happen with wear on the gears or just a loos fixing letting the timing slip back a bit,
Posted on Nov 20, 2009
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