Circles not circle but oval

I Recently Added the Falcon laser rotary roller to my 5w laser. According to the instructions that came with it. I had to enter $101=60.375. It then tells me after use to change $101 to 80. What does that mean? Also with the rotary off, and back to normal cutting, my circles are oval. I am assuming i have something wrong and cant figure it out. Never had issues before the rotary. Any ideas or suggestions?