Originally Posted by
KalamaQuilts
measuring the seam is not the best way to judge your seam alloowance. you need to measure the units sewn together to see if you are hitting it. I have dozens of 3.5" unfinished 9 patches I've sewen over the years to check seam allowance over the years on different machines. .
I cut 1.5" strips (pressed fabric, unpressed fabric grows when pressed after sewing), sew 3 strips together, slice into 1.5" strips again and make your 9 patch and press. If at that point you have an exact 3.5" square you seam allowance is on the sweet spot.
This makes sense to me. I will measure again. I’ve made a lot of quilts and I’ve not had this severe an issue. I’ve always been able to work with it. This is a different style of block, I guess I could say. I was really blessed to find it so soon. I’ll use this way of measure in the future, thanks.