2nd layer not adhering Why?

My first layer seems fine but when comes to the second layer it just turns to garbage any suggestions. 2nd layer does not adhere at all it just turns into little clumps of plastic atop of first layer.

Are your Z steps/mm correct?
Are your E steps/mm correct?
Is you layer height under 80% of your nozzle diameter?
Is your hot end hot enough so that the layers bond?

Edited 1 time(s). Last edit at 02/07/2014 11:46PM by Dust.

#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,2560,468.66} //
#define DEFAULT_MAX_FEEDRATE {500, 500, 5, 25} // (mm/sec)
#define DEFAULT_MAX_ACCELERATION {9000,9000,100,10000} // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for skeinforge 40+, for older versions raise them a lot.

#define DEFAULT_ACCELERATION 300 // X, Y, Z and E max acceleration in mm/s^2 for printing moves
#define DEFAULT_RETRACT_ACCELERATION 300 // X, Y, Z and E max acceleration in mm/s^2 for retracts

Hot end extrude fine on testing it from 230-250 C comes out easy (abs 3mm)
.5m nozzle 0.2 layer height

It is a sells mendel using ramps 1.4 wades extruder sg2 hotend

And what are your Z threads?
Ie what sort of machine.

As 2560 steps/mm is not much use unless it matches you hardware, steppers and micro stepping.
(This would be correct for M8 thread, 1.8 steppers running 1/16th micro stepping)

Also your E steps/mm did you calibrate that?

M8 thread running 1/16 yep

I went off a base for a wades extruder with dremeled bolt.

Then your e steps/mm are bound to be very wrong

take a look at [reprap.org]

Thank you will read it.