Z calibration prusa i3 aluminum

[Kieutrang]

I have had the printer for weeks now and still can not get to print past the first layer. The position of the extruder head is too far from the print bed now matter how I configure the print in any slicer program and level the bed. When printing with a .2 nozzle it will print fine for the first layer then set to high for the second. Any larger nozzles will never get close enough to the bed. If I set the z axis hight to .05 the nozzle sets itself at least 5mm over the print bed. My only conclusion is that the z axis is not calibrated in the firmware...? I cannot load new firmware as my arduino ide does not show sanguino as a board type in the menus. Please help.

[William]

Hi, If your nozzle is 0.4, the first floor height is recommended to use :0.3;
The distance between the nozzle and the hot bed is the distance of a 70gA4 leveling paper.