Re: Dual Extruder Firmware Configuration

"#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,4000,500} // default steps per unit for Ultimaker"

this defines steps/mm for X,Y,Z,E but where is E2?

If it identical to the first extruder

try

#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,4000,500,500}