Thanks for the reply and the helpful suggestions. After doing what you said, ( loosened the nuts and set the needle and vibrator foot to feeddog level). the presser
foot does move, but marginally. The photo labelled no.3 shows the max elevation that the presser foot makes. It clearly does not make the 7mm that I have seen
suggested. Please let me know where I can go from here in terms of trouble shooting the issue. My machine looks very similar to the one in your photo.
Thanks again.
Mike