Multi Pressure Advance (Nozzle relation)

[ianalexis]

Description

Enable the possibility of loading more than one PA according to the nozzle, as it has a direct relationship.

Useful for avoiding multiple profiles just for nozzle changes, but also for new machines with tool changes that allow for nozzle changes while maintaining the material.

• "Legacy” value with a single value and no nozzle, take that value as before.
• Single value (e.g., 0.4,0.2), it is taken as legacy.
• If there is a value without a incomplete value ("0.5," || ",0.2") is ignored.
• If nozzle does not match the listed values:
  • 1 PA value = using that value
  • Multi PA values = linear interpolation

Nowdays Prusa do this by:

    "filament_start_gcode": [
        "M572 S{if nozzle_diameter[filament_extruder_id]==0.4}0.02
			{elsif nozzle_diameter[filament_extruder_id]==0.5}0.018
			{elsif nozzle_diameter[filament_extruder_id]==0.6}0.015
			{elsif nozzle_diameter[filament_extruder_id]==0.8}0.01
			{elsif nozzle_diameter[filament_extruder_id]==0.25}0.09
			{elsif nozzle_diameter[filament_extruder_id]==0.3}0.065
			{else}0{endif} ; Filament gcode\nM142 S40 ; set heatbreak target temp"
    ],

+240 Prusa profiles that could be converted into 41 profiles analyzed in a logarithmic table.

Fix

It also fix \n not being displayed for PA and APA unless they are written by the user:
Before

After

Adaptive Pressure Advance:
I just adapt when it takes the PA value but maybe we have to:

• add the nozzle size to it as a value = Nozzle, PA, flow, acceleration
  • Using multiple APA models.
  • interpolate it's resulting values with a potential curve based in the PA.
• use it as it is and do not adapt it

If this is merged

• I will edit it if this PR is merged
• Prusa profiles could be readapted to use this structure and no longer have the values in filament_start_gcode.