how can i do to let Z become 0

[seravee23636 0]

how can i do to let the Z become 0 when the project complete?

[gr5 2,167]

Are you sure that's what you want?  Z=0 means the nozzle is touching the print bed.  In some cases that means you just smashed through your part.

 

At least you should move the head to one of the corners first.  For example front left corner is 0,0.

 

G0 X0 Y0   ; this moves the head to the corner

G0 Z0        ; this brings the nozzle down to the glass - likely hitting the part if it's large - for some printers the part will hit the roof of the printer if you do this

 

 

Or maybe instead you want to move the bed all the way down?  Does your bed move or does your nozzle move?  Anyway that would make more sense.  it depends how large your printer is.  If your printer is 100mm tall then you could do:

G0 Z100 and that will move the nozzle 100mm from the bed.

 

You can insert these gcodes near the end of the gcode file.  After the very last G1 or G0 command but before anything else.