Need help with calibration

Are you running the slack part of the chain along the top beam? That’s how most designs are done these days. Original design had the slack part of the chains running vertical down the side. If running along top, you have to select Chain Off Bottom… I suggest following makermade’s instructions on calibration. It applies to maslow no matter where you bought it from

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.makermadecnc.com/wp-content/uploads/2019/06/1.5CalibratingYourMaslow-3.pdf&ved=2ahUKEwjNivWR88_pAhWRl-AKHf8qB10QFjAEegQIARAC&usg=AOvVaw0HsGlpcqdvCoq94t5x_rQ2

Or you can follow the wiki