Problem with homing

[PrinterHacker]

I have recently purchase Geeetech i3 pro B 3d printer (2017 version). I have problem with homing the printer head. When I press LCD printer Prepare->Auto home, the printer head goes to its homing position (X=0, Y=0 Z=0) and goes up (Z axis) a few millimetre. If I press the Auto home again it goes to its homing position and goes up few millimetre again and resets homing position with (X=0, Y=0 Z=0) which is few millimetre above the bed . It keeps on going up and up for subsequent auto home key being pressed. I understand for homing it should go to X=0, Y=0 Z=0 and set the z = +1 so that when it starts printing it should start from z=0 position. Because the printer is resetting its Z axis every time for an Auto home the extruder will never touch the printer bed.

I have installed the latest firmware (Marlin_p13_pro_b) as per Geetech instructions.

Is that any tweaks in the firmware for homing for the printer correctly to correct this behaviour.

[bang]

But that is the position(the stopping position in your words) where you start to level the heatbed?

If I press the Auto home again it goes to its homing position and goes up few millimetre again and resets homing position with (X=0, Y=0 Z=0) which is few millimetre above the bed .