Okay. You need to use a walking foot in order to do quilting. This is because quilted fabric is thick, and a general foot will not go through the layers without messing up the machine.
Here are the instructions my singer came with:
Here is a youtube video from Singer on how to do this (note this is not my machine):
Okay, this is what is taken off. The above is what is used for general sewing.
In the middle is the general foot. There is a little pressed in tab in the back of the sewing machine, and the foot falls right off.
On the left is the thing that holds up the general foot. It unscrews. Use the screw on the right to unscrew the screw, and then the thing on the left just falls down. [On a side note, the BH is the button holer lever – this is not used in the case of the walking foot].
The huge white piece is the walking foot.
It has a little lever on the right which goes up and down. Make sure it goes above the needle bar when installing it. The needle bar is the what the yellow arrow below is pointing to. The little lever on the walking foot is pointed to by the orange arrow.
Done and done, it’s all installed! 🙂