Pfaff select 4.0 Owner's Manual - Page 22
The IDT, Integrated Dual Feed
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Operate your Pfaff select The IDT (Integrated Dual Feed) For sewing any fabric precisely Pfaff provides the ideal solution: the Integrated Dual Feed, IDT system. As on industrial machines, the IDT feeds the fabric from the top and bottom at the same time at the same stitch length. The fabric is fed precisely. On light fabrics such as silk or rayon the dual feed prevents puckering of the seam. The even feeding action also ensures perfect matching of checked and striped fabrics. The IDT keeps all layers of quilt projects aligned to prevent stretching of the top layers. Engaging the IDT Raise the presser foot. Press the IDT down until it engages. Important! For all work with the Integrated Dual Feed IDT, use presser feet with the center back cut-out. Disengaging the IDT Hold the Dual Feed with two Àngers at the ribbed ankle. Press the IDT down, then pull it away from you and release the IDT slowly upward. 22