ABL - Air Printing Issues...help needed.

[fkirdis]

Hi,

I just finished ABL on my Prusa I3v 10" and everything went really smooth with the setup. I used the latest available Marlin firmware and my printer probes 5 grid points. G28 and G29 command works perfectly except the air printing part .
When i try to incorporate those commands in my start G-Code, it executes them perfectly but does not offset correctly when its time to print my chosen 3D model. Below is my start code.
--------------------------------------------------------------------
G28 ; home all axes
G29 ; Probe Bed
G92 E0 ; zero the extruded length
G1 E10 F300 ; purge nozzle with 10mm of filament
G1 E10 F30 ; purge nozzle with 1mm of filament
G92 E0 ; zero the extruded length again
M190 S40 ; set and wait for bed temp to be reached
--------------------------------------------------------------------


I have below offsets for my probe and I have verified it several times in order to be sure (approx. 5 times ). I've also tried to put the Z-probe offset in my slicer (S3D) with no luck.
Am i missing the obvious (...trivial solution) or what. Because its as long as I have G28/9 in my start code, that should be enough for the compensation?!?

So turn to my fellow reprappers and ask you kindly, WHAT AM I MISSING?

// Offsets to the probe relative to the extruder tip (Hotend - Probe)
// X and Y offsets must be integers
#define X_PROBE_OFFSET_FROM_EXTRUDER -32 // Probe on: -left +right
#define Y_PROBE_OFFSET_FROM_EXTRUDER 0 // Probe on: -front +behind
#define Z_PROBE_OFFSET_FROM_EXTRUDER -2.8 // -below (always!)



/Ferhat