I was cutting out some blocks this morning, nothing complicated, I just needed a few more squares and rectangles. When I started on the rectangles, my cutter seemed really wobbly.

I actually wrecked my first set of rectangles- of course I was cutting four at a time. I tightened the bolt on the cutter but I don't know if I was just in too much of a hurry or what! Maybe I will try putting in a new blade because I really like this red ergonomic cutter...

I have done something like that and realized for some reason, my ruler was not actually touching the fabric the whole time. There is a lip on one end of the ruler which allows for it to sit above the fabric if I do not place it correctly. Once I made sure the ruler was flat on the fabric, my problem was solved. Hope you have better luck the next time you try to cut your fabric.

Hope u fixed it!

Tightening the bolt usually works for me. If not then I check how securely I'm holding down the ruler.

Nope, the ruler was not moving, must have been the cutter...

I have had the bolt on the cutter come loose, a cracked blade--no idea how I managed to do that--and if you're talking about the right handed Martelli rotary cutter--the Olfa blades don't fit it quite right which makes it wobble. It needs the blade with only a small circle in the middle--not the kind that is a circle with tabs.

I have also had a lump in my cutting mat from fleece and flannel cause wonkyness (new quilting word--LOL). And cutting mats that are just crap--they have a rough, pebbly texture instead of smooth & slightly rubbery.