- pinning one side to the leaders on the take up bar,
- rolling the backing onto the take up bar,
- pinning the opposite side to the leaders on the backing bar,
- rolling the backing onto the backing bar,
- then re-pinning the backing to the take up bar so the backing lays flat.
I'm not that patient. I pin one side to the take up bar leaders. Roll the backing up until the opposite end just reaches the leaders on the backing bar. Pin that side to the leaders. A quick look shows me if the backing is square. If it's not, then I slide the leaders to the left or right until the backing is square.
Squared by sliding the front leaders to the right and the back leaders to the left:
Notice the diagonal seams? What's that all about?
If your backing is to narrow or short extra fabric naturally must be added. But if extra fabric is added to one side then there will be bulk where the seam lays on top of itself as the quilt is rolled up on either the take up or backing bar. Definitely a problem.
Diagonal seams do not stack. This means no bulk throwing off the even advancement of the quilt onto the bars.
Is there any benefit to quilters who use domestic machines for quilting? I think so.
Say you have the perfect piece of backing but it's just a bit too narrow or too short. The problem is solved with a diagonal cut.
Here's a rectangle. It's either too short or too narrow.
With a diagonal cut like this:
We can make it longer by sliding the two sides:
Or wider by sliding in the opposite direction:
If the backing needs to keep it's length but needs to be wider, then this just might be the answer:
By adding the rectangle between the diagonal cut the backing keeps it's length and is made wider. If the quilter does not have the same fabric for this step, another fabric could be used. Adding the second fabric this way does not yell "I ran out of the fabric I needed". Which is what happens if the quilter just adds the different fabric to one side of the quilt. Putting the fabric on a diagonal through the centre makes this a design choice. Not an oops.