Cutting off a finished scarf before finishing the whole warp, is quick and easy with this technique.  Make a two stick heading after you have finished the first scarf by weaving one inch of plain weave or as close as you can get; insert 2 sticks into the next 2 sheds and weave at least one inch more.

Here is the scary cutting part.  Cut between the finished scarf and the one inch of plain weave you wove.  Remove your scarf from the front apron rod.  Then fold the two sticks and tie them to the apron rod as shown below.  Voila! You are back in business and you don’t have to re tie on your warp, so your tension remains consistent.