Dressmaker 6102fa model dressmaker sewing machine threading

SOURCE: sewing machine dressmaker model 300z

i think you have not looped the thread around the tension on the top before putting it onto the bobbin. you need to wrap the thread in a circle around the sphere near the regualr threading lines.

SOURCE: Need Dressmaker 300z sewing machine manual

you're welcome. have a good new year.

SOURCE: Thread breaking during sewing on Ericco sewing machine

replace the needle, use a heavier thread, insure the material is advancing properly as you sew.

SOURCE: Singer Sewing Machine model 9224. Bobbin thread

If you turn the handwheel, can you see a metal ring rotating around the outer edge of the bobbin case? If not rotating, broken gear or timing belt off.
If that ring is turning, remove the needle plate and bobbin case. As this ring now rotates, you will a finger on the ring that will pass behind the needle from right to left and it should catch the thread from the eye of the needle. If this finger, the "hook" passes above the eye, you have a timing problem.

Let me know.

SOURCE: Need a manual for a Dressmaker Sew. Machine Model

This manuals is available, free, on the Singer website.
http://www.singerco.com/accessories/manuals.html
Just type dressmaker into the search box and click on search.
This will take you to the next page, just click on free download!