how to use "stay hot"

[mbunjes]

I have the following macro in my printer.cfg : 

#PRINT_END
#
#   Use PRINT_END for the slicer ending script - please customise for your slicer of choice
#
description: End print and tidy up (retract filament, move toolhead, turn off heaters)
gcode:
    {% set STAY_HOT = params.STAY_HOT|default(0)|int %}   # STAY_HOT=1 to keep heaters primed for more printing

    STATUS_BUSY
    M400                           ; wait for buffer to clear
    G92 E0                         ; zero the extruder
    G1 E-2.0 F3600                ; retract filament
    G91                            ; relative positioning

    #   Get Boundaries
    {% set max_x = printer.configfile.config["stepper_x"]["position_max"]|float %}
    {% set max_y = printer.configfile.config["stepper_y"]["position_max"]|float %}
    {% set max_z = printer.configfile.config["stepper_z"]["position_max"]|float %}

    #   Check end position to determine safe direction to move
    {% if printer.toolhead.position.x < (max_x - 20) %}
        {% set x_safe = 20.0 %}
    {% else %}
        {% set x_safe = -20.0 %}
    {% endif %}

    {% if printer.toolhead.position.y < (max_y - 20) %}
        {% set y_safe = 20.0 %}
    {% else %}
        {% set y_safe = -20.0 %}
    {% endif %}

    {% if printer.toolhead.position.z < (max_z - 40) %}
        {% set z_safe = 40.0 %}
    {% else %}
        {% set z_safe = max_z - printer.toolhead.position.z %}
    {% endif %}

    G0 Z{z_safe} F3600             ; move nozzle up
    G0 X{x_safe} Y{y_safe} F20000  ; move nozzle to remove stringing

    M107                           ; turn off fan
    G90                            ; absolute positioning
    G0 X{max_x / 2} Y{max_y - 20} F3600 ; park nozzle near rear
    M117 Print Complete.

    {% if STAY_HOT != 1 %}
        M118 Disabling heaters
        TURN_OFF_HEATERS               
        M84                            ; disable steppers
    {% else %}
        M118 Keeping printer hot for more printing...
        SET_HEATER_TEMPERATURE HEATER=extruder TARGET=100 ; set nozzle temp for standy-by for probing
    {% endif %}

    {% if printer.configfile.config["bed_mesh"] %}
    BED_MESH_CLEAR
    {% endif %}

    {% if printer['fan_generic exhaust_fan'] %}
    STOP_TEMP_MONITOR
    SET_FAN_SPEED FAN=exhaust_fan SPEED=1.0
    FAN_DELAY FAN=exhaust_fan DELAY=300
    {% else %}
        M118 No exhaust fan configured
    {% endif %}

    {% if printer['fan_generic cooling_fan'] %}
    SET_FAN_SPEED FAN=cooling_fan SPEED=1.0
    FAN_DELAY2 FAN=cooling_fan DELAY=300
    {% else %}
        M118 No cooling fan configured
    {% endif %}

    STATUS_READY
    #UPDATE_DELAYED_GCODE ID=_CLEAR_DISPLAY DURATION=60

 

And I would like to be able to print again after a print ends. There is an option whereby if you fill in "1" in the "stay hot" macro, the printer should not cool down but it doesn't work.
I also don't know when to give this command. When the first print is finished ? Or when it starts ? Either way nothing happens and the printer cools down immediately after the print.
Can someone shine a light ?

[PFarm]

I use this as my print-end macro. It cools to a probing temperature. When I want to turn off the printer, I use the preset pull-down cooldown. turn off fan is commented out.

 

[gcode_macro PRINT_END]
#   Use PRINT_END for the slicer ending script - please customise for your slicer of choice
gcode:
    M400                           ; wait for buffer to clear
    G92 E0                         ; zero the extruder
    G1 E-1.0 F3600                  ; retract filament
    M104 S150                      ; Set Extrude Temp to 150C
    M140 S110                        ; Set Bed Temp 110C
    G91                            ; relative positioning
    G0 Z1.00 X20.0 Y20.0 F20000    ; move nozzle to remove stringing
   # M107; turn off fan
    G1 Z5 F3000                    ; move nozzle up 5mm
    G90                            ; absolute positioning
    G0  X345 Y345 F3600            ; park nozzle at rear
    G0  Z10 F3600

[mbunjes]

I'll try that, it looks a lot simpler.