Simplicity SL1220 Sewing Machine Instruction Manual (Model SL1220) - 17 Pages. Lost your sewing machine's manual? We've got you covered! This instruction manual is the ultimate guide to unlock the full potential of your Simplicity SL1220. No more confusion or frustration—just clear, concise instructions right at your fingertips. What's inside? Everything you need to know from setting up to mastering your sewing machine and all its features. The physical copy of the instruction manual is a soft-cover printed photocopy.