The needle and thread get stuck at the bobbin and the lo light come on my 8077

1. Replace thread with good thread. (Check by holding to light to see if there is fuzz).
2. Adjust the bobbin tension. The tension on top is set to three and the bobbin tension should be equal to this amount.
3. Replace needle.
4. Check the top tension with tension foot down to see if the thread can move or does it get stuck? If it gets stuck the tension control may need adjusted or cleaned.
5. Pull the bobbin thread above the throat plate and pull on the thread. It must have some tension but not get stuck.
TENSION TENSION TENSION IS THE PROBLEM!

CHECK THESE FIRST::
NEW NEEDLE.
MAKE SURE NEEDLE IS INSERTED THE RIGHT DIRECTION. LOOK AT YOUR INSTRUCTION BOOK.
MAKE SURE INSERTED IS TOTALLY INSERTED.
CHECK TO SEE IF THE BOBBIN THREAD IS STUCK. ALSO, ENOUGH LENGTH OF BOBBIN LENGTH EXTENDED TO ALLOW THE NEEDLE TO PULL IT UPWARDS.
MAKE SURE THE BOBBIN THREAD IS INSERTED THE RIGHT DIRECTION AND SET WITH CORRECT TENSION.
CHECK TOP NEEDLE TENSION TO INSURE THERE IS TENSION ENOUGH TO PULL THE BOBBIN THREAD ABOVE THE THROAT.
IF THESE DON'T WORK YOU MAY NEED TO GO TO YOUR LOCAL REPLAIRMAN.

try changing the needle
make sure the thread has not come off the thread take up lever
make sure the bobbin is turned the right way in the bobbin case
make sure the bobbin is not over filled
make sure the bobbin is not damaged
it's very possible that the machine could be slightly out of time

The needle thread breaks
1. the needle thread is not threaded properly
2. The needle thread tension is to tight
3. The needle is bent or blunt
4. The needle is incorrectly inserted
5. The needle thread & the bobbin thread are not set under the presser foot when starting to sew
6. the threads were not drawn to the rear after sewing
7. The thread is either to heavy or to fine for the needle


Bobbin thread breaks

1. There is a right way & wrong way to insert the bobbin in the case --when you insert the bobbin in if it doesn't stitch correctly turn the bobbin over see if that helps or bobbin case is not inserted correctly

2. Lint has collected in the bobbin holder

3. The bobbin is damaged & doesn't turn smoothly

4. Lower thread tension is two tight

Try http://www.fixsewingmachine. com I also suggest that you clean bobbin case. Now, when needle is "stuck", this requires patience and care in "jiggling" the hand wheel to and fro until needle point begins to clear the jammed area. Carefully snip one thread that moves up under needle and jiggle hand wheel by carefully turning hand wheel toward you to see if you can move the take-up lever all the way up to the UP position. Look at bobbin case area and remove bobbin. Cut bobbin thread and remove bobbin case. Sweep gently with brush underneath case and carefully, gently sweep over the feed dogs, poking very ends of brush bristles into "teeth" area to remove lint, fuzz ball/s, and any loose thread/s. Raise presser foot, remove (possibly bent) needle. Insert new needle of appropriate size for fabric weight. Make sure needle pushed all the way up into needle bar groove, at side to back. Keep presser foot RAISED while rethreading. This allows thread to locate tension discs, and HOLD THREAD TAUT. Replace bobbin, making sure thread is EVENLY distributed on it. Imablanced bobbins cause jams, and bobbins with burrs and scratches can real havoc as well as the hook part of the shuttle where the bobbin fits. Smooth such areas with emery cloth carefully, ever so gently. Hope my suggestions are a solution for you. Jimmy

There has to be a problem in your threading or your needle. You may have the needle inserted backwards, flat side has to face rear or the needle is bent. Totally unthread your machine and make sure that there are no tangles and that it feeding the right way. Watch how they show your for threading and winding the bobbin, plus threading the bobbin. Good luck, but I truly think it is in your threading.

I've had the Lo come on my screen of my sewing machine also, but normally when I turned it off it corrected the jam up.
Lo- A button is pressed when the machine halts due to a overload
wait 15 seconds to recover
if thread jamming causes the overload, remove the tangled thread
check the bobbin area for lint & loose threads
also check to see if the bobbin is warped
check you needle to see if it's bent-roll on a flat surface to see if it rolls correctly
if it's blunt it makes a popping sound when going thru fabric
let me know if these suggestions help

you might have a bent needle

Try changing your needle