How do I change the tension husqvarna 3610

SOURCE: Sewing Machine Thread Tension problems

What size needle are you using?

SOURCE: bottom of stitch is bunched with alot of thread and machine jams

Try these time savers:
Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test, then let me know, we can go to step 2. If not, try different spool of thread, same test until you get a smooth pull (tip: always check your thread this way when you thread your machine)
Step 2:
Pull on your threaded bobbin thread while it’s in the machine. Does it pull smooth and even? If so, go to step 3. If not, try a new bobbin (bobbins get bent or distorted if wound too tight).
Clean thoroughly in the hook and bobbin case area and oil 1-2 drop is all.

SOURCE: Husqvarna bobbin thread jamming

Make sure the bobbin thread "clicks" into the tension slot. However, thread nests underneath are usually caused by the top thread, not the bobbin. Make sure your thread is seating itself in the top tension disks. To do this, put the spool on the machine, pull off about 12 or 15 inches of thread, then hold this thread down with one finger on your right hand as you take the thread tail through the threading path with your left hand. When you get to the needle, tug the thread (still holding it down up top) to be sure it seats in the tensions disks. You must also have the presser foot UP while you do this to ensure that the tension disks are open. Watch the first thread guide after the spool as you sew to make sure the thread is not jumping out of there (a common problem with Des1 machines, fixed with SEs - no comfort to you and me!). I have put a small piece of tape across there with the end turned back on itself so no sticky bit is going to catch on the thread.

SOURCE: skipping stitches and knotting up underneath.

Hello,
Here are a few things to try.

* Raise your feed dogs if your machine has this feature.

* When you start to sew a seam, hold the upper and bobbin thread tails. Hold them back and out of the way as you sew your first couple of stitches. This will keep them from getting caught in your machine.



* Your fabric may require a different needle. Generally, heavier fabrics require larger needles and thinner fabrics, smaller needles. You may also need a larger needle if you’re sewing through many layers of fabric. And make sure to use a ballpoint needle for knit fabrics and a sharp needle for woven (or a universal needle for either). And make sure your needle is appropriate for the type of thread you’re using.


* Adjust the pressure of your pressure foot, it may be too light for your fabric.


* If your upper thread and bobbin threads are different types, try using the same thread for both. And use a good quality, brand name thread.



* Change your needle plate. Try switching to a needle plate with a smaller hole (a straight stitch needle plate).


Important Note: If you change your needle plate, check to make sure your needle aligns perfectly with this smaller hole before starting to sew. A misaligned needle could hit the plate and break, which could be dangerous. And make sure to change your needle plate back for zigzag and other wide stitches.

Hope this helps.

SOURCE: top stitch tension looping, underneath stitch is ...

check that you have threaded it right