Am new to reprap.
Have built a Makergear Prusa with three microswitches as endstops from their kit with a fully constructed UltiMachine RAMPS 1.4 Using Arduino .22 to compile. Compiles fine, but I imagine I need to modify the source code in some fashion, as once I upload the compiled Marlin, the Reprap host software has no effect upon motors, heater, etc. Anyone have a suggestion?