So, here we go. "The Binding Gizmo" tool is the clear acrylic piece that comes with the spiral booklet you see next to the tool. Thea did a fantastic job giving you 26 pages of great information about binding fabric requirements & how to cut straight & bias binding in a way that gives you the longest strips. The booklet is filled with step-by-step instructions that gives you a fantastic visual presentation.
Once you've prepped your binding (I usually use 2 1/2" wide bias strips that are pressed to 1 1/4" and then roll them "jelly roll" fashion and stick the roll in a sandwich bag to keep it from unrolling), lay it on your quilt edge, matching its raw edges with the quilt's raw edges. Next, lay the Gizmo on top, lining up its dark line with the end of the binding. Put a pin through the binding and the quilt at the end of the Gizmo....notice the purple flower pin at the left side of the Gizmo. The pin marks where you'll start sewing the binding to the quilt. Now with a pencil, mark the binding in the slot that corresponds to the width of your binding. (She has several slots for different sizes)
Next, using the Gizmo ruler, measure 3" above the end of the binding and put another pin to mark the spot where you'll stop sewing after you've attached the binding all the way around the quilt.
Here's the "jelly roll" of binding all rolled up and kept under control in a sandwich bag.
Time to sew! Begin stitching at the first purple flower pin. (I like a 3/8" seam allowance so that my binded edge is full and not hollow feeling)
Here I've sewn all around the quilt and I've arrived at that second purple flower pin...the stopping spot.
Time to take the quilt away from the machine and re-measure & mark for the closure. Lay the binding you just were sewing on top of the beginning section. By pulling the starting end out a little from the edge of the quilt you can once again lay the Gizmo on top, lining up the dark line with that sticking out end. Now mark the top binding section in the correct slot.
Now, open up the ending section, right side up. I've put a pin on the line I made through the slot.
Open up the beginning section of the binding and place it face down to the right of your last drawn line...or on the side closest to the quilt using a right angle. (Sorry I used batiks in the photo!) You'll sew a diagonal seam joining these 2 sections together...the seam will be parallel to the edge of the quilt...the same direction as the white marking pencil.
Once sewn I like to let it lie back in position to make sure everything rests where it should. Time to trim the seam. I trim it to 1/2" so that the bulk is distributed nicely.
Press open the seam.
Voila! Time to finish attaching the perfectly closed binding. You too will love this tool!
One other helpful hint: Whether I'm doing square or rounded corners, I always press my binding open on the front side to help it turn nicely to the back. I also always "make-up" all the corners, press them and then pop some binding clips on them before I ever start hand stitching the binding in place. I find that when I do this, the corners are nicely "pressed" in position when I get to them to sew and it makes fiddling with the corners effortless.
Now I really do have to go clear some flat surfaces!! Happy stitchin' for the soul!