On most sewing machines the presser foot simply holds the fabric down and all movement is accomplished with a single,
bottom feed dog.The Ultrafeed™ LS-1 & LSZ-1 use a mechanical "WALKING" presser foot that moves forward and back
in time with the feed dog to ensure that the layers of fabric are consistently moving together through the machine.
Feed heavy, slippery, sticky fabrics with ease. Walk over thick hems, make the transition from thick to thin without
skipping stitches. Produce consistent stitch lengths. A variable stitch length mechanism allows for very long straight
stitches-up to 6 mm. This reduces needle pucker for professional quality upholstery and canvas work. Zig zag stitches
(LSZ-1 only) can be made up 5 mm wide and can be spaced tightly enough to bind edges (on a carpet for example).
