[BUG] Temperature::preheat_end_ms_hotend missing in 2.1.2.2

[Fiamat]

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

Yes, and the problem still exists.

Bug Description

After setting MILLISECONDS_PREHEAT_TIME to any positive value the temperature.cpp checks for nonexisting member preheat_end_ms_hotend in Temperature class. Indeed temperature.h doesn't declare such variable. I see that bugfix branch already brought back this variable, but official .zip with Marlin 2.1.2.2 (https://marlinfw.org/meta/download/) contains this bug.

Bug Timeline

No response

Expected behavior

No response

Actual behavior

During build process a following error is thrown:

Marlin\src\module\temperature.cpp:598:12: error: 'millis_t Temperature::preheat_end_ms_hotend [1]' is not a static data member of 'class Temperature'

Steps to Reproduce

1. Uncomment MILLISECONDS_PREHEAT_TIME in Configuration_adv.h and set it to any positive value
2. Try building the software

My Configuration(_adv).h: Marlin.zip

Version of Marlin Firmware

2.1.2.2 (official .zip)

Printer model

Ender 3 v2

Electronics

Bigtreetech SKR Mini E3 v3

LCD/Controller

StockEnder 3 v2

Other add-ons

BL-Touch

Bed Leveling

UBL Bilinear mesh

Your Slicer

None

Host Software

None

Don't forget to include

• [X] A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

No response

[ellensp]

As a work around In Marlin/src/module/temperature.cpp

Find

#if MILLISECONDS_PREHEAT_TIME > 0
  millis_t Temperature::preheat_end_ms_hotend[HOTENDS]; // = { 0 };
#endif

and replace it with

#if MILLISECONDS_PREHEAT_TIME > 0
  millis_t Temperature::preheat_end_time[HOTENDS] = { 0 };
#endif

[Fiamat]

As a work around In Marlin/src/module/temperature.cpp

Find

#if MILLISECONDS_PREHEAT_TIME > 0
  millis_t Temperature::preheat_end_ms_hotend[HOTENDS]; // = { 0 };
#endif

and replace it with

#if MILLISECONDS_PREHEAT_TIME > 0
  millis_t Temperature::preheat_end_time[HOTENDS] = { 0 };
#endif

I use temperature sensor "66 : Trianglelab T-D500 500°C High Temperature Thermistor" which has a long dead zone around room temperature. Event the Marlin itself throws warning when MILLISECONDS_PREHEAT_TIME is below 30e3 ms with this sensor. I guess that the proposed workaround can cause problems with temperature control in my setup (?).

[ellensp]

Marlin has this code

#if ANY_E_SENSOR_IS(66)
...(skipped code)... 
 #if MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED < 5
    #error "Thermistor 66 requires MAX_CONSECUTIVE_LOW_TEMPERATURE_ERROR_ALLOWED ≥ 5."
  #elif MILLISECONDS_PREHEAT_TIME < 15000
    #error "Thermistor 66 requires MILLISECONDS_PREHEAT_TIME ≥ 15000, but 30000 or higher is recommended."

to ensure MILLISECONDS_PREHEAT_TIME is > 15000 for a type 66

[thisiskeithb]

Closing since this is already fixed in bugfix-2.1.x.

[thisiskeithb]

Patch for 2.1.x submitted:

• https://github.com/MarlinFirmware/Marlin/pull/27023

[github-actions[bot]]

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