A mail inserter has a first web driver (100) to move a web (5) from a web supply (2) and a second web driver (150) to feed the web to a cutter (220) for cutting the web (5) into sheets, wherein the first and second web drivers have different velocity profiles to allow a web loop (XLOOP) to form between the web drivers. The loop is variable between a maximum size and a minimum size. When the loop reaches the minimum size, the first web driver (100) is running at its maximum speed. If the second web driver (150) suddenly stops, at this point the first web driver (100) is decelerated at a rate such that when the first web driver (100) stops, the web loop is at its maximum size. The acceleration of the first web driver (100) is at a constant rate which is inversely proportional to the difference between the maximum loop size and the minimum loop size.
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