My husqvarna Viking h class I bought brand new in sept has stoped sewing forward iv changed the needle taken off the spool case checked for fluff or fabric build up in at a loss as what to try now iv only used it twice !!!! Thanks in advance ps I have power and the moter is working

SOURCE: bobbin thread/feed dog eating fabric

This is a very common problem with really lightweight fabric and can often be cured (if doing straight stitching) by using a straight stitch needle plate and foot. The wider needle plate and foot openings on newer machines give the machine/thread a wider area to pull the fabric into the machine. By using a straight stitch plate/foot you remove the wide opening, eliminating the majority of the problem.

Also - try using a specially coated needle (Teflon or other non-stick finish). The thread feeds more smoothly through the needle and the needle more smoothly through the fabric, causing less drag into the needle plate opening.

Hope this helps. Don't hesitate to respond to this if you have further specific questions. We're always happy to help

Happy stitching,
Kim & Linnette
www.sewingexpressions.com

SOURCE: thread jams & wheel axel cannot turn

there are a couple of things that come to mind.  
Bobbin:   wound with uneven tension.  Try taking the bobbin, rewind that thread onto another bobbin and wind slowly.  make sure the thread feeds onto the new bobbin evenly.
upper thread:  catching on something or not flowing off the spool easily.
you're doing well, sounds like you consulted the manual and used your noggin, hang in there and let me know if this doesn't help.  we can troubleshoot some more!

SOURCE: husqvarna viking Platinum 775 fabric won't advance

Most of the time the bobbin case gets hung under the feed dogs, take your needle plate off and the bobbin cover there is a gray colored finger with a number 10 torx screw holding it in you can also try a small flat head screw driver, remove that finger and then remove your bobbin clean the hook out and replace the bobbin making sure it seats itself on the hook with the small notch on the bobbin case lining up with a small metall spring on the back right side of the hook area.

SOURCE: Sewing thick fabric and machine won't send it through

Sergers are not really meant to sew very thick material. The blades have a maximum amount of range, or thickness that they can reach to cut. If you go outside that range, get ready for a big repair bill! You can break loopers and even the needle plate when you "push" a serger. My advise would be to use you sewing machine for the, "pounding" work. The type of material matters too, A thick Quilt like fabric can be sewn becatuse it's not dense material. A thinner harder denim could max out at 3 layers because of it"s hard finish. If the fabric you're sewing isn't dense like, you could just need new knives.

SOURCE: I have a Husqvarna Mega Quilter Viking. The

If you're sure you're using the correct needles, you should take it to a service tech to align it properly.