[BUG] (LA on 2208 drivers not working)

[Dtwpurple]

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

Yes, and the problem still exists.

Bug Description

Tmc2208 standalone drivers do not allow for linear advanced control.

Bug Timeline

No response

Expected behavior

No response

Actual behavior

No response

Steps to Reproduce

1.Enable linear advance in config
2. flash firmware
3. put hands in head after hours of messing with k values and nothing changes.

Version of Marlin Firmware

2.1.x bugfix

Printer model

Ender 3 4.2.2 board.

Electronics

stock.

LCD/Controller

stock one, with the knob

Other add-ons

No response

Bed Leveling

No Bed Leveling

Your Slicer

Prusa Slicer

Host Software

SD Card (headless)

Don't forget to include

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

Additional information & file uploads

Configuration_adv.zip

[EvilGremlin]

Your config is impossible: _DRIVER_TYPE TMC2208 can't exist on BOARD_CREALITY_V422.
Also if your bowden is sloppy you might well not see any difference.
Show photos of calibration pattern, 0 to 1 with 0.01 step

[thisiskeithb]

Your config is impossible: _DRIVER_TYPE TMC2208 can't exist on BOARD_CREALITY_V422.

We should probably clarify that TMCs are installed in *_STANDALONE mode in the warning:

Marlin/Marlin/src/inc/Warnings.cpp

Lines 666 to 668 in 2200607

	#if ENABLED(EMIT_CREALITY_422_WARNING) && DISABLED(NO_CREALITY_422_DRIVER_WARNING)
	#warning "Creality 4.2.2 boards come with a variety of stepper drivers. Check the board label (typically on SD Card module) and set the correct *_DRIVER_TYPE! (C=HR4988, E=A4988, A=TMC2208, B=TMC2209, H=TMC2225, H8=HR4988). (Define NO_CREALITY_422_DRIVER_WARNING to suppress this warning.)"
	#endif

[Dtwpurple]

2208 is possible on v422. look in the config. it tells you to use that instead of the tmc2225 drivers. as those dont exist. " Use TMC2208/TMC2208_STANDALONE for TMC2225 drivers" . its not a bowden issue. there is no difference when setting k values. heavy bulging all the way up the tower with NO CHANGES.

[Dtwpurple]

Your config is impossible: _DRIVER_TYPE TMC2208 can't exist on BOARD_CREALITY_V422.

We should probably clarify that TMCs are installed in *_STANDALONE mode in the warning:

Marlin/Marlin/src/inc/Warnings.cpp

Lines 666 to 668 in 2200607

	#if ENABLED(EMIT_CREALITY_422_WARNING) && DISABLED(NO_CREALITY_422_DRIVER_WARNING)
	#warning "Creality 4.2.2 boards come with a variety of stepper drivers. Check the board label (typically on SD Card module) and set the correct *_DRIVER_TYPE! (C=HR4988, E=A4988, A=TMC2208, B=TMC2209, H=TMC2225, H8=HR4988). (Define NO_CREALITY_422_DRIVER_WARNING to suppress this warning.)"
	#endif

they are in standalone mode. and im using the right drivers as the config tell you to use 2208 instead of 2225. anytime you build marlin with ender 3 config it will shoot that error as a reminder to check them.

[thisiskeithb]

If you have TMC2208s, use TMC2208_STANDALONE: #26699 (comment)

[Dtwpurple]

If you have TMC2208s, use TMC2208_STANDALONE: #26699 (comment)

bruh do you guys even check the files? it is setup as tmc2208 standalone.

[EvilGremlin]

We did. Its not _STANDALONE.
Print this and show photos https://marlinfw.org/tools/lin_advance/k-factor.html

[thisiskeithb]

bruh do you guys even check the files? it is setup as tmc2208 standalone.

"bruh", not when I downloaded your config:

#define X_DRIVER_TYPE TMC2208 is not the same as #define X_DRIVER_TYPE TMC2208_STANDALONE

[i-Fixit]

As far as I'm aware for Linear Advance to work with the Creality v4.2.2 board you'd need to do a UART mod on it. This is what I did for my Ender 6 which uses the v4.3.1 board ... basically the same board layout, although I needed to also change one of the stepper driver chips as well ;-)

Ender 6 UART mod

Obviously you'd need to modify the correct pins file for the v422 board, but the same pins do appear to be available on said board.

[classicrocker883]

As far as I'm aware for Linear Advance to work with the Creality v4.2.2 board you'd need to do a UART mod on it.

I thought that has since been solved since LA became available for these boards. I remember there was a whole write up about the PR, dont remember which one it was, but AFAIK performing that mod was no longer necessary.
here is a link to a write up and info about the mod before LA changes in code

before, yes it was required to do that mod, but LA should work normally just by enabling it.

edit: #24533

[robherc]

@i-Fixit the 4.2.2 board:
#1 works great with linear advance...so this is a nonsensical bug report
#2 has soldered-down 2208s in standalone mode, so UART is not much of an option without major PCB surgery

[thisiskeithb]

This Issue Queue is for Marlin bug reports and development-related issues, and we prefer not to handle user-support questions here. (As noted on this page.) For best results getting help with configuration and troubleshooting, please use the following resources:

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After seeking help from the community, if the consensus points to a bug in Marlin, then you should post a bug report.

[github-actions]

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