Folgertech i3-2020 is a reference platform for Marlin. I don't know about the FT-5.
That stuff is set in Configuration.h. Look for BED_SIZE_X and BED_SIZE_Y
The UBL mesh will cover the bed. What ever you say the bed size is... The mesh will cover it. It is movement off the mesh that is the problem.
That stuff is set in Configuration.h. Look for BED_SIZE_X and BED_SIZE_Y
The UBL mesh will cover the bed. What ever you say the bed size is... The mesh will cover it. It is movement off the mesh that is the problem.