cashs_mom

I'm trying to remember, but I think for thicker fabrics you need to increase pressure on the presser foot not reduce it. I rarely have to use this feature on my Bernina's so I'm not sure but you could try that. I would just use a hump jumper or anything thick to raise the front or back of the presser foot. I find it easier in the long run.

Edit: After a quick search, I found that I didn't remember correctly and you have to lessen the pressure on the presser foot for thick seams or fabrics. You could try dialing it down another number.