Question about Brother Sewing Machines
This can be caused by the incorrect routing of the bobbin thread or incorrect tension of the thread.
Posted on Apr 13, 2010
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Posted on Jan 02, 2017
Question: How does one find the tension discs??? I have a White 1740 with a top drop in bobbin and I went thru the same problems as night_wolf above, then, ultimately, the top thread will now not pick-up the bobbin thread through the fabric. It picks up the bobbin thread without fabric in play, but once fabric is added (for free motion quilting) it won't pick it up. This is after using the machine for the last 10 days to piece and quilt without a problem until this morning.
I'm at a loss.
Posted on Feb 12, 2008
A few steps to help you troubleshoot:
Remove the needleplate from your machine and inspect the opening for any rough spots... run your finger over the area to feel for any sharp bits. If you discover some rough spots, they can be smoothed using a fine emery cloth. Use this gently - don't want to distort needle opening, just smooth the roughness.
If no rough spots on needleplate, open the bobbin cover and turn the handwheel towards you until the hook (little pointy part of bobbin area) is towards the bottom of the machine. Run your finger over the point to feel for any rough spots. Again - a fine emery cloth can smooth this. Be VERY careful to not flatten the hook - just a little smoothing to get rid of rough bits. Too much can ruin the hook. If you're uncomfortable with this, don't hesitate to take to your Pfaff tech and point out the rough bits.
You can loosen the large setscrew on the side of the case to allow you to blow out whatever may be trapped.
Use a flashlight and look down into the top of the machine/takeup lever area. You may be able to see a bit of thread and remove it. If you can't see an offending bit, try "Flossing" your upper thread path by grasping the thread close to the spool and after it comes out of the needle. Run the thread back and forth through the thread path to see if you can dislodge anything
Kim & Linnette
Posted on Jun 13, 2008
this is a common problem, don't worry it's easy to fix. take the spool of thread off, remove the bobbin. look for any stray thread pieces in or around the bobbin case, rethread the top of the machine and when you do, follow the threading guide precisely and ---here's the trick---make certain that the thread goes between the tension discs.
Posted on Jan 17, 2009
Rule of thumb.. Loops on the bottom, problem on the top. Loops on the top, problems on the bottom.
Set your upper tension at 4, and rethread the machine from the top. Just before you thread the needle, but the presser foot down. If the thread pulls right thru easily, then the thread is not thru the tension wheel right. Because, if you can't pull the thread thru with the presser foot down, you have it threaded right.
Posted on Apr 25, 2009
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