Jethro, just a thought that you can try as a last resort. I had a similar issue on my A5, I couldn't get it to burn a perfect circle, the ends would never meet and figures would have a distinct pattern anomaly across them. I also noticed that if I moved the laser by hand, it felt like there was a bump in the rail or a flat spot on the wheels. It turned out that I had one of my belts too tight. Once I loosened it just a tad, everything began working much better. It's the simple things that drive me crazy.
Posts made by Belarch 1
RE: Image alignment issue in T2 and benbox
RE: A3 Pro, firmware problem
@lohan997 Try changing your speed to 115200. I've heard that the A3 won't work with the T2 software on any other speed. I'm running the A3 pro with T2. Make sure your Microprocessor is set to Nano, Post Processor is set to Grbl(S). You'll find these settings under T2Laser Controller/Settings. Hope this helps.