Question about Sew Pro QuickStitch SP-402 Mechanical Sewing Machine
The "knotting up" can reveal a lot. If you have loose threads on one side or the other, the tension on the opposite side will be the culprit.
So if the threads are on the underside as you sew, it is the top tension. Top tension ought to be between 4 & 6 (this variation to allow for the different weights of fabric in your projects).
If tensions appear correct, and the thread is definately in the channel between the discs, try raising presser foot, remove thread and with a strip piece of fabric 8 - 10" (20 - 25cm) gently insert the fabric strip and clean between the discs with a see saw / to and fro action.
It may be there is lint trapped between the discs, this will keep them slightly apart and reduce the actual tension, sometimes dramatically.
If the loose threads are on the top, it is bobbin tension that is loose, it too may have lint in the spring and be giving a "false" tension.
I would not recommend fiddling with bobbin tension without being shown, it may end up with missing small screws and spring pieces.
Hope this is of some help,
Posted on Jan 20, 2008
i have found where you can get this instructional manual for free. Go to http://www.topinnovations.com/products/sew/SP-402/SP-402.html. if you are not looking for the SP-402 they also have other sewing machine manuals at this web site and you can get the address http://www.topinnovations.com and type in the search for what you want. I hope you all like this and it helps you in time to come.
Posted on Mar 28, 2008
The problem is that you purchased a clone of the Sailrite Ultrafeed. Most people do not know how much work Sailrite puts into each Ultrafeed Sewing Machine before it is shipped to customers. They hold 17 patents on the Zigzag Ultrafeed and know this machine inside and out. So when each machine goes through the assembly line in Indiana they are then tested by Sailrite in 2 layers of canvas then 8 layers of canvas then 4 layers of vinyl fabric if it does not sew it flawlessly they fix it, Ultrafeeds work right out of the box! So, it is highly unlikely that you will be able to get the clone machine to work. It must be totally rebuilt (a 4 hours process for an experienced technician). Sailrite will not work on any clone machines. So get your money back and buy a Sailrite Ultrafeed! If you are desperate and can not return the machine you can buy a DVD that Sailrite made for the Ultrafeed (each Ultrafeed purchased gets it free) it can be purchase here: http://www.sailrite.com/Ultrafeed-Advanced-Maintenance-DVD . It will help with timing issues, but will not show you how and what to do to rebuild the machine.
Posted on Jan 01, 2009
Sounds like the timing is off. Take the bobbin out of the bobbin case and lower the needle into the needle plate. As the needle starts on the upswing, the hook should meet the needle just above the needle eye on most machines. If it isn't meeting at that point then your hook timing will need to be adjusted.
Posted on Mar 17, 2010
SOURCE: Bobbin thread will not stitch.
Have you had the machine serviced since you purchased it? This is something that should be done at least once a year.
Take the machine to a certified Singer dealer and explain what is happening. There may or may not be something that needs to be adjusted.
Your warranty is still in effect, but is now limited. Attempting to repair it yourself or having someone who is not a Singer dealer repair it will invalidate the remaining warranty.
Posted on Apr 16, 2010
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