Question about SINGER 7470 Sewing Machine
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Posted on Jan 02, 2017
SOURCE: Needle hitting bobbin plate
Is the needle inserted correctly with the flat side at the rear and fully up into the holder ?
If yes, take off the needleplate, remove bobbin case and slowly rotate the handwheel towards you watching the relationship between needle, and the "hook" of the moving "race".
Set on wide zig zag........when the needle is fractionally past it's lowest point, and starting to rise, the hook should be level with the left side of the needle when on the right hand stitch of the zig...the eye of the needle will be below the hook, and ready for thread to be picked up for the stitch to form.
Any other result will mean your timing needs adjusting.
Posted on Feb 10, 2008
SOURCE: Bobbin problems
Any time you have looping on the bottom, it is almost always related to the upper tension and not anything in the bobbin area.
A good way to troubleshoot this is to turn the machine off, blow out the upper tension disk assemblies with canned air, (the machine needs to be off because most canned air uses butane as a propellant. Butane + electricity = bad;) replace your needle, and rethread your machine. Once you've threaded it to the point where you're about to put the thread through the needle, "floss" the thread forward and backward to ensure that the thread seats correctly into the tension assemblies.
Set your tension to around 4.5 for most applications, and drop your presser foot. Give the thread a gentle tug to see if the tensions have engaged the thread, then thread the needle.
If doing this does not address the problem, you probably need to have your tensions professionally calibrated. This is also true if the needle is in fact hitting something in the bobbin area. This is usually caused by the machine's timing being out of alignment, which is not something that can be fixed at home.
Posted on Sep 10, 2008
SOURCE: My needle was hitting the
The most common reason for this is that the bobbin case is inserted the wrong way. There's a slot on the bobbin case. When it's inserted into the machine this should face up. The needle comes down through this slot and picks up the thread from the bobbin. If it's put in the wrong way the needle hits against the case and cannot get through to the thread on the bobbin.
The other possibility is that the new needle doesn't fit properly. It may not be pushed fully up into the machine. Sometimes this can happen if the needle is too thick for the machine or if the screw wasn't loosened enough to allow the needle up fully.
Posted on Sep 12, 2010
Possible bent or wrong needle. If ok, check the zig-zag mechanism to see if it has come uncoupled from the needle mechanism. Good luck!
Posted on Oct 02, 2010
I think that you have had the wrong size bobbin. It should be a class 66. Look in your manual, it should tell you. If, that is not it, call Singer at 1-800-4singer and ask if it sounds like the timing and if so where can you take it to get fixed. This is a nice machine, my friend, has one and it is worth getting fixed if you like it.
Posted on Jan 02, 2011
Testimonial: "it was in the timing .problem solved. thank you for your help. "
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