[FR] Ignore runout mm distance on print start with triggered runout sensor

[Ale11Re]

Did you test the latest bugfix-2.1.x code?

No, but I will test it now!

Bug Description

When FILAMENT_RUNOUT_DISTANCE_MM is defined and a new print is started without filament Marlin will be printing for the set FILAMENT_RUNOUT_DISTANCE_MM before stopping.
However, when FILAMENT_RUNOUT_DISTANCE_MM is not defined, Marlin will immediately ask for filament change.

Bug Timeline

No response

Expected behavior

I'd expect Marlin to avoid starting a new print at all.

Actual behavior

Marlin starts to print till FILAMENT_RUNOUT_DISTANCE_MM is reached.

Steps to Reproduce

Define FILAMENT_RUNOUT_SENSOR and FILAMENT_RUNOUT_DISTANCE_MM (let's say 5) with all of the required defines.

Version of Marlin Firmware

Marlin 2.1.2.2

Printer model

Bad Devices DX-01

Electronics

Megatronics_3

LCD/Controller

ELB_FULL_GRAPHIC_CONTROLLER

Other add-ons

No response

Bed Leveling

None

Your Slicer

None

Host Software

None

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

Conf.zip

[thisiskeithb]

When FILAMENT_RUNOUT_DISTANCE_MM is defined and a new print is started without filament Marlin will be printing for the set FILAMENT_RUNOUT_DISTANCE_MM before stopping.
However, when FILAMENT_RUNOUT_DISTANCE_MM is not defined, Marlin will immediately ask for filament change.

FILAMENT_RUNOUT_DISTANCE_MM is working as designed, so I’ll convert this to a feature request.