Variables for [save_z_home]

Basic Information:

Printer Model: Ender 5 Plus
MCU / Printerboard: BTT Mini e3 V3

Describe your issue:

Does anyone know if it is possible to take values from (exp. [stepper_x]…) and calculate a coordinate?
I tried the following:

[safe_z_home]

#{% set save_x = printer.configfile.settings[“stepper_x”].position_max %}
#{% set save_y = printer.configfile.settings[“stepper_y”].position_max %}

#{% set save_x = printer.configfile.config[“stepper_x”][“position_max”]|float / 2 %}
#{% set save_y = printer.configfile.config[“stepper_y”][“position_max”]|float / 2 %}

#{% set save_x = printer.configfile.settings[“stepper_x”][“position_max”]|float / 2 %}
#{% set save_y = printer.configfile.settings[“stepper_y”][“position_max”]|float / 2 %}

home_xy_position: 177.5,177.5 #{save_x},{save_y}
speed: 200
z_hop: 10
z_hop_speed: 100

(all commented out because actually i had to print something)

Thx in advance…

Thanks for your Help.
But i think i dont really understand. Why cant (or shouldnt) i use it in this section?
I tried to use it in save_z_home and the setting of the variable now seems to work, but there seems to be an error when reading this value.
Error:
Unable to parse option ‘home_xy_position’ in section ‘safe_z_home’

I tried bed_x_max,bed_y_max and {bed_x_max},{bed_y_max}

means you CAN or SHOULD not?

I think i should tell you the Reason for this…
I often change the complete Toolhead. So everytime the Size and Positions do change.
I try to use only one variable at start of the printer.cfg for all the pendencies, so that everything will be calculated over this variable.
the savehome section was just the beginning.
Also i would use it in
[screws_tilt_adjust]
[bed_mesh]
[stepper_x] position_endstop: 338
[stepper_y] position_endstop: 330
and as i said
[safe_z_home]…

Ich sehe grade in deinem Profil das du aus D kommst…
Ich bin mal so frei die Sprache zu wechseln da mir das englisch recht schwer fällt.

Ok, also geht nicht weil geht nicht. Soweit ok…
Das mit dem Homing Override ist mir nicht ganz klar… was ist das und wie wende ich das an? Bzw könnte das u.U. eine Gesamtlösung werden?

Ok, ich habe mir das mit dem Override mal zu Gemüte geführt.
Das scheint nicht der Weg zu meinem Ziel zu sein.

Trotzdem erstmal vielen Dank für deine Hilfe.