Short version: 1: Is it possible to run just the stepper motors (pulled out of a DVD Drive) using either a 5v 2a mobile charger or a 9v battery plugged into the Ramps 1.6 power input? 2: what could be a possible issue for "echo: busy: processing" message on pronterface. I believe its not an issue with the extruder or bed temp reading. Long version: A year ago I tried building a 3dprinter usinby JavedWilde - General