Question about Brother LB6770 PRW Computerized Sewing Machine
I have a new LB6800 machine that when I try to do the embrodiery, the only thread showing on the right side of the material seems to be mostly bobbin thread. I tried adjusting the tension, but that does not seem to help. As far as I can tell the machine is threaded corrently?
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Posted on Jan 02, 2017
SOURCE: Adjusting Bobbin Tension
I looked forever to find this darn green bobbin screw. Around the opening for your bobbin is a plastic cover. If you slide it forward it will pop right off. Once you remove this, the bobbin case will lift right out. On the front you will see your green screw for adjusting your bobbin tension.
Posted on Sep 25, 2008
SOURCE: threading lower bobbin
There are some different bobbin cases for different machines but the one you have is a pretty common one with a finger sticking out on top. If you examine the bobbin case you will see a slot on the side of it and there is another piece of metal screwed onto it. This is the tension they are describing.
To thread it properly, turn the bobbincase upside down and insert the bobbin in the case so you can see it. Place your thumb on top of the bobbin and pull the thread through the slot on the side of the case and under the piece of metal(the lower tension) which I described to you earlier.. When you have done that, remove your thumb from the bobbin and pull on the thread. It should have some tension on it.
Next,placing a thumb or finger on the bobbin to keep it from falling out, turn the bobbin case over.
Keeping the finger sticking up lift the lever on the
front of the case and insert the bobbin and bobbin case onto the spindle inside the hook assembly(The part that is in the bottom of the machine that turns when the hand wheel is turned.) Don't worry about the thread that is sticking out.
Holding the upper thread under the presser foot ,turn the handwheel towards you until the top thread pulls the lower thread to the top. Pull the thread to the left of the machine, insert your fabric, lower the presser foot and begin sewing
One more thing , The finger sticking up on the bobbin case will go into a slot on the ring holding the hook inside the machine.
Hope this solves your problem.
Be sure you thread the upper part properly. It should go through the tension, then the take up lever and then the needle. Tension should be set at around 5
Posted on Jan 17, 2009
SOURCE: Set the timing
bbragg77 solution lacks a few points that I found out after talking to someone who repairs the machines.
Turn the balance wheel (counter-clockwise) so that the needle moves down and the hook is supposed to be spinning counterclockwise. As the needle reaches the bottom and starts to come back up, stop when the need reaches approximately 2 mm off the bottom. In this position, the point of the hook should be directly behind the needle.
Posted on Jul 25, 2009
it sounds like your bobbin tension is too tight. to adjust bobbin tension, remove bobbin case (remove needle plate first) and adjust bobbin tension screw on side of case until bobbin thread has a slight resistance as you pull it through the bobbin case.
this will be trial and error until you get best result. you should always try and match top and bottom threads. if the top thread is quite thick you may have continue to increase needle thread tension until balanced.
Posted on Jul 26, 2009
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