Gcode force ignore Z_SAFE_HOMING  

Gcode force ignore Z_SAFE_HOMING

Hi.

First post here, recieved my Prusa i3 mk2s about a month ago, and it works great 🙂

The issue I'm having is that my power went out when I was not at home, and I'm attempting to save my print (foour hours in) using this Guide

So I have managed to home XY and move the Z axis to the top and set coordinated to 0. However the true 0 point for the mk2 is not at the top, but set when Z is homed with the pinda probe.

So I could do a auto home, but the printet part blocks the Z axies to home when XY is homed. Some digging around and the gcode G28 Z ; home Z axis only "would" home the Z axies only, after i placed XY over the rear - right calib point (point 9?). But when I do this, the printer starts by homing XY. Some more digging and I figured this is because of the Z_SAFE_HOMING

/**
* Z Safe Homing
*
* Enable this option to avoid homing with a Z probe outside the bed area.
*
* With safe homing enabled:
*
* - Allow Z homing only after X and Y homing AND stepper drivers still enabled.
* - If stepper drivers time out, it will need X and Y homing again before Z homing.
* - Move the Z probe (or nozzle) to a defined XY point before Z Homing when homing all axes (G28).
* - Prevent Z homing when the Z probe is outside bed area.
*/
#define Z_SAFE_HOMING

#if ENABLED(Z_SAFE_HOMING)
#define Z_SAFE_HOMING_X_POINT ((X_MIN_POS + X_MAX_POS) / 2) // X point for Z homing when homing all axis (G28).
#define Z_SAFE_HOMING_Y_POINT ((Y_MIN_POS + Y_MAX_POS) / 2) // Y point for Z homing when homing all axis (G28).
#endif

So I read the comments in that code, and it says If stepper drivers time out, it will need X and Y homing again before Z homing So I tried G28 X Y ; home xy axies then moved XY to a spot where Z could be homed and issued G28 Z ; home z axiesAt this point XY did not home, but the XY axies still moved the extruder to the first calib point before starting to home Z, so I had to kill power.

So Is there any way to home Z on the 9th point (or at current XY) with gcode? I could disable the safe feature and flash firmware, but then I would lose calibration and would not be able to recover like shown in the guide.

If it was just this print I would accept my losses and start over, but it's not the first time I have heard of, or experienced power-failure, failed prints, and a PSU is not an option at the time.

Thanks in advance, Magnus.