Originally Posted by
PaperPrincess
There are 3 main things that can make your blocks come out wrong. Cutting is the first one. Make sure that you are accurately measuring. If you use a quarter inch foot, you may still have to adjust your needle position. Also, fabric and thread weight will affect your seam so it's a good idea to check at the beginning of every project. Here's how to check:
http://www.quiltingboard.com/tutoria...ce-t89997.html
I was going to suggest the same tutorial... or one like it. It took me a long time to be consistent with my quarter inch seam. Some patterns can be fudged a bit without much notice if they are "off" but as you challenge yourself with intermediate patterns, you will want them to match up. Besides, I am a little OCD and needed to achieve an accurate quarter inch seam and now I am a much happier quilter.