I just got a pfaff 7570 so excited because of the IDT dual feed on the pfaff and i just started machine quilting (been hand quilting for 4 years). i'm working on a project and was able to quilt a couple pieces no problem. cotton fabric on top and bottom, fusible fleece inbetween. I tried to run a straight stitch down this piece about 10" wide x 50" long and i got what i guess it called puckering. the back of the piece which is next to the feed dogs is perfect. but this is the top of the fabric that sits against the fleece that isn't fused. i relieved the tension that didn't work. i even tried to start in the middle instead on the ends that didn't work. i've redone this piece 3x getting worse results everytime. i take it off the machine and here is what it looks like. i can not figure out the problem. i'm using just my regular foot pfaff foot "0" with the idt on. so its feeding fabric from top and bottom which means this shouldn't happen! help anyone.

Are you applying any side to side tension with your hands while sewing it? I find I get better results that way.

Is there another foot to be used with the dual feed? Bernina has a dual feed but the foot is different. I am not sure how your regular foot can provide dual feed.

Bernina has a dual feed foot AND a walking foot for quilting. But they're different manufacturers. I'm sure someone that has your same brand machine can give you tips.

I had the same problem with fusible batting. I won't be using the fusible on big projects anymore, I will stick with basting spray and safety pins.

I have never had a problem with my dual feed. I have used polyester and cotton batting, but never fusible. I do have a problem if I use basting spray. It seems to gum up the needle and cause skipped stitches, so I only use safety pins.

You need some kind of basting. If I read this right, you fused the back to the batting, but not the top? That is probably why the top is shifting on you and puckering.
Try spray basting or pinning the top down too :wink: :D:D:D

spray baste or pin--just check your idt foot is engaged the black attatchment sits at the back of the needle shaft needs to sit low into the back of the foot you have on--it can be dissengaged and sits higher and away from the foot

If you have a darning foot try that. It doesn't put any tension on the top so it can flow through easily.

I'm sorry i didn't mention this, yes I did baste the entire thing before I quilted it, with pins. I always baste the fabric.