everything seems normal till I try to print a test cube.

repetier host connects .. manual controls allow homing all axis .. home all button or G28 all repeat and end with Z axis parked 2cm above the bed

load cube in slicer and slice it .. can view it and move it and center it etc. and it LOOKS like it is sitting on the bed.

when I tried to print it .. I turned on the fan and heater manually .. when up to temp I manually extrude 1mm to see plastic at nozzle

when I click print .. machine does G28 again ...... THEN moves the bed down (away from the nozzle) another 13cm (total 15cm) and starts Buzzing (attempting to move to .3mm for first layer I think cause that is what is in the box for Z height) and plastic starts extruding while x and y move like it is depositing the first layer (what is displayed on the screen is the perimeter being printed.

I can't find any explination for this

Any ideas?

dmac257