Presser Foot Pressure Adjustment
 

Does anyone ever adjust it?

I do, when I'm machine quilting I adjust to keep it much looser so that the quilt will move easier as I free motion.

Yep, for fmq and ruler work (novice learner here with both of these).

Yes. If I have many layers of fabric to sew through (such as with purses or bags), or a very fluffy batting, I will adjust the pressure.

Yes, I do in order for the pressure to fit the project I'm working on. However, with my new machine, I was told not to do that. It's suppose to adjust automatically...but I really need some control over it. So, I'll get on the Naughty List because I do fiddle with it.

I loosen the pressure to do FMQ and to machine sew binding onto the front of quilts. Any other time it needs to be adjusted.

My Bernina 1230 does not allow for presser foot adjustment, so I never do it. Have not needed it either. I have adjusted the pressure in some of my vintage machines -- usually to loosen it so both fabrics feed evenly under the foot.

I learned to use the presser foot pressure adjustment on my first Bernina. I really like how it makes it easy to sew on different fabrics and thicknesses.

Yes. For thick projects.... hemming geans, quilt sandwiches, binding.... if the project seems to be dragging.

With my Janome 6600 I had to constantly adjust the pressure foot pressure
specially when sewing over thick seams and for quilting. Now that I'm using
the Janome 9400 I don't have to. It seems to do it automatically. Sewing
over thick seams is a dream.