stitch length changes

[jeepdoc]

I have a singer 111w153 machine If i sew 2 layers stitch length at spec if I use my welt foot while sewing welt noticed  length is cut in half----normal? I tried messing with upper foot pressure nothing made it better or worse. If i try top stitching through 3 layers of vinyl lenght falls short of what it should be any ideas?

[bobbin]

Perhaps your machine's feed dogs are too low.  Sometimes they loosen with time and all you have to do is tighten the screws that hold them in place. 

[jeepdoc]

thanks bobbin ive been messing with it I did adjust the feed dogs and also found that the presser foot height adjustment slipped some seems better now

[baileyuph]

welt noticed  length is cut in half----normal?

I had similar experience and it too turned out to be walking foot adjustment.

It turned out to be a good learning experience, now I can do the adjustment.  Checking the feed dog height would be part of the adjustment also.

Doyle

[jeepdoc]

Yeah never thought about checking the feed dog screws they were so loose suprised it didnt fall apart