Janome Acufeed 1/4" Seam Foot for MC7700 &6600 The Janome Acufeed 1/4" Seam Foot Sews a 1/4" seam allowance quickly and accurately. This foot is great for piecing quilts and topstitching. The Janome Acufeed 1/4" foot is designed to work with the Memory Craft Professional AcuFeed system (7mm).