You have a mendel90 not a Ultimaker so why are you using this config
from [reprap.org]
#define DEFAULT_AXIS_STEPS_PER_UNIT {80, 80, 200 * 16 / 1.25, ((200 * 16 * 39.0)/(11.0 * 7.4 * 3.142)) / 0.94}
this assumes 16 micro stepping and 8mm threaded rod at 1.25mm /rev
200 *16/1.25 = 2560
200.0*8/3 = 533
The values for X ,Y and Z would not normally need adjustment
from [reprap.org]
#define DEFAULT_AXIS_STEPS_PER_UNIT {80, 80, 200 * 16 / 1.25, ((200 * 16 * 39.0)/(11.0 * 7.4 * 3.142)) / 0.94}
this assumes 16 micro stepping and 8mm threaded rod at 1.25mm /rev
200 *16/1.25 = 2560
200.0*8/3 = 533
The values for X ,Y and Z would not normally need adjustment