Here's the link to the Jamie Wallen you tube on setting the tension. This is how I set mine, I don't have a Nolting, but it's a good place to start. You do have to check, and possibly adjust the tension with every quilt you load. Thread, batting, backing, amount of piecing can all have an impact.
If you are having tension issues on curves, you may need to slow down.
One thing that hasn't been mentioned is the tension on your frame. You can have thread tension issues if the sandwich is loaded too tightly. You should be able to poke your finger up from underneath the quilt and grab it with your other hand.
https://www.youtube.com/watch?v=Q1mRhcquZTM