Check your tools. Do your rulers all measure the same? Different brands are not always the same measurements. If you start making a quilt with one ruler, you need to stick with it all the way through.
Does your ¼” foot of your sewing machine measure the same as the ¼” on your ruler? If they are not identical ¼” you’re going to have problems. They need only be ½ a thread width different and your points won’t be accurate.
To get your seams to match pressing is the key. When you finish a row of stitching lay the iron on top of the stitching line and press.
On the wrong side turn fabric over and gently press seam towards the darker fabric. If you don’t press the stitching line first you run the risk of the thread stretching which will cause seams to not line up.
How often you change your blade depends on how you treat it. If you hit the side of your ruler or run over a pin, you will create a dead spot in the blade. It will need to be replaced.
Cleaning and oiling your blade on a regular basis will give you a lot longer life. After every project you finish, pull your rotary cutter apart and wipe the build up of lint away. Put a few dabs of machine oil on a soft cloth and wipe blade. Reassemble your cutter.
