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Quiltville
Custom Quilting
http://www.quiltville.com Putting it "OnPoint"!!(Click here for printerfriendly version)Figuring the math for diagonal quilt settings! Here is the math formula for finding out the sizes of triangles you will need for a quilt that is set "block to block" WITHOUT sashings:
Example#2:
*Note*
I like to round my
numbers up a bit when cutting the squares for side triangles. For
instance, if your closest fraction is 1/8", I personally would round it
up to the 1/4". If the closest fraction is 3/8", then I would round it
up to the 1/2". The blocks will float inside the top a bit
when pieced with bigger triangles, but I trim it down after the top is
together.
Lay out the triangles and corners with your blocks. Begin sewing the quilt into rows starting at one corner. Your first row will have one corner block, two large setting "wing" triangles, and the corner triangle. Your second row will have three blocks, two wing triangles...etc. Each row will get larger as you get to the center of the quilt. I like two assemble the quilt rows together as I go until there are two halves of the top.....and then sew the two halves together in one long seam.
After the top is
together, use your ruler and rotory cutter to
trim the edge of the quilt 1/4" away from the corners of the blocks at
the quilt top edge. This gets rid of all the dog ears from sewing the
rows together too.
What if my quilt has SASHINGS?! What sizes do I cut? The side and corner
triangles need to be cut using the same calculations above, only we now
add the sashing measurement to the block measurement as one unit.
The sashing is considered to be part of the block when calculating the
side and corner triangles. Say you have an 8" finished block size, but
you are setting the quilt with 2" finished sashing. You would figure
that you need setting triangles for a 10" finished block size (8" block
+ 2" sashing) to set your quilt.
