Stop for safety reasons - Elna Quilter's Dream 6003Q

go to this link and scroll the page you might find something to help you out.

sewing machines motor runs but will not sewing Google Search

Take it back to your service provider asap. When the safety is activated, there is an issue that could present a hazard.

Probably best to take it for service. It has stopped due to a safety issue that could be dangerous to you or the machine.

I have a feeling the sensor has been jolted just enough to make it stop. Pretty sure this can be adjusted by the dealer quickly. Worse case scenario, you'll have to replace a sensor.

sewing backwards is primarily to lock the threads at the start of a sewing process ans so stop unraveling of the stitch
it should be about 1/2 " long so you start sewing 1/2 inch , reverse back to start then reverse and sew on as normal
finish of the stitch should be the same before you raise the foot and snip the cottons

try changing the needle just in case it 's damaged
try rethread the machine, top & bobbin
make sure to use every thread guide
clean under the needle plate for loose threads or lint
if none of these suggestions help you might think about having the
machine checked to make sure nothing wrong with the parts inside

it's possible that the safety device on the machine is going out or there's another problem in the machine keeping the safety device from returning to normal the machine needs to be serviced

This is usually what happens if the bobbin case gets dislodged, its just held in place by a magnet but if you have a jam up, often gets moved out of position. Remove top metal plate, take out bobbin, and have a look at the bobbin case, should be two metal markers or red dotsmfront side that align. Lift the case out by grasping edge and lifting up and towards you, clean underneath with the little brush, remove any jammed up threads, then return case to position, aligning the marks.

it sounds like some part of the computer is going bad

when you have the foot down ready for sewing,the needle thread , pull on it slowly and make sure there is resistance through the top tension, if there isnt any then the tread will ball up underneath