anet a8 start/end gcode

end.gcode

M104 S0 ; turn off extruder
M140 S0 ; turn off heatbed
M107 ; turn off fan
G91 ; relative positioning
G1 Z25 ; raise head 25mm
G90 ; back to absolute positioning
G1 X0 Y220; home X axis and push Y forward
M84 ; disable motors

start.gcode

G21 ; set units to millimeters
G90 ; use absolute positioning
M82 ; absolute extrusion mode

M104 S{material_print_temperature_layer_0} ; set extruder temp
M140 S{material_bed_temperature_layer_0} ; set bed temp

G28 X0 Y0  ;move X/Y to min endstops
G28 Z0     ;move Z to min endstops
G29

M190 S{material_bed_temperature_layer_0} ; wait for bed temp
M109 S{material_print_temperature_layer_0} ; wait for extruder temp

G0 X0 Y15 F9000 ; Go to front
G0 Z0.15 ; Drop to bed
G92 E0 ; zero the extruded length
G1 X40 E25 F500 ; Extrude 25mm of filament in a 4cm line
G92 E0 ; zero the extruded length
G1 E-1 F500 ; Retract a little
G1 X80 F4000 ; Quickly wipe away from the filament line
G1 Z0.3 ; Raise and begin printing.

What did you use to upload the code to your printer.

@hackerspace09 it's been a while, but I believe it was under GCODE Scripts, under OctoPrint Settings.

Is this the start/end gcode for the printer or extruder?

Both, I believe (based on the comments).

What does "raise head 25 mm" do if the head is less than 25 mm from its maximum height?

I'd rather eliminate the relative positioning and use what Prusa does:

{if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+25, max_print_height)} F720 {endif}