[BUG] E1 not moving after T0 -> T1 or with Mixing

[snakesrules94]

Did you test the latest bugfix-2.0.x code?

No, but I will test it now!

Bug Description

E1 stepper not working when switching tool T0 -> T1

Bug Timeline

new bug

Expected behavior

E1 stepper should turn when switching tool or using mix ratio

Actual behavior

E1 stepper does not turn

Version of Marlin Firmware

2.0.9

Printer model

Custom

Electronics

Robin nano V2

Additional information & file uploads

Hi there, switching from release 2.0.8.2 to 2.0.9 and i have a problem when switching tool . i have a single nose with 2 entries and two extruders .
In 2.0.8.2 , if i switch tool T0 to T1 or apply a mix , everything is ok .
I've report the same config to the latest 2.0.9 release and E1 stepper never turns , in switching tool mode or in mix mode .

I will roll back to 2.0.8.2 until further correction.

Regards.

[ellensp]

Please attach your 2.0.9 configuration files so we can test.

[snakesrules94]

Hello , here are the config files.
Regards.
Marlin.zip

[Wakelin2]

i'm having the same issues

[Wakelin2]

do you have link to 2.0.8.2

[slowbro]

do you have link to 2.0.8.2

Here it is: https://github.com/MarlinFirmware/Marlin/tree/2.0.8.2

[nayim12]

I have same pblm

[SkyTakes]

Exactly same problem! Worked perfectly up to 2.0.8.2
Board: BOARD_ZRIB_V20
Mixing Extruder - E0 OK / E1 Not working
If I change the config to:
#define EXTRUDERS 2 (set 2)
#define SINGLENOZZLE (uncomment)
// #define MIXING_EXTRUDER (comment)
then E0 and E1 works but I´m not able to mix (as it should be)

PS. Just tried 2.0.9.1 - same problem - E1 not working if mixing extruder is selected

[Robo-Print]

I have the same problem with a Geeetech A10M using Marlin 2.0.9, 2.0.9.1 or bugfix-2.0.x version that only the first extruder is working at Mixing-Extruder mode.
I tried it with A4988 and also TMC2209 V3.1 stepper drivers.

Switching from Mixing-Extruder mode to Single-Nozzle mode with two extruders both extruders work as SkyTakes already mentioned.
Also if I am using an older Marlin 2 bugfix version from november 2020 (I used before upgrading to 2.0.9) both extruder work in Mixing-Mode without any problem.

[slowbro]

@Robo-Print when in mixing mode, is the second extruder online, i.e. held in place by the driver, or can you freewheel it?

[Robo-Print]

Hello slowbro,
In mixing mode the second extruder is held in place, I can‘t turn the wheel of the extruder.

[thinkyhead]

Mixing has not been intentionally touched for quite some time. Please try to narrow down the exact commit where the problem first appears.

[thinkyhead]

Please test the bugfix-2.0.x branch to see where it stands. If the problem has been resolved then we can close this issue. If the issue isn't resolved yet, then we should investigate further.

[snakesrules94]

@thinkyhead : hello , i've just checked and tried the bugfix release , behavior is still the same : E1 motor does not turn after selecting T1 and asking for extrusion . The motor is not locked during the situation , i can manually turn it .

[Robo-Print]

The same at my Geeetech A10M printer. I used the actual version of the bugfix-2.0.x branch and the second extruder in mixing mode is also not working. But I am also able to move the second extruder, it is not locked.

Sorry in contrast to my comment of july 7th I also can turn the second Extruder during and after print attempts in mixing mode, I only need a little bit more force than I expected and now I saw that I can't turn the wheel of the first extruder at all but the second with more force...

[thinkyhead]

It sounds like ENABLE signals are getting lost.

Would you be able to test some bugfix-2.0.x commits to narrow this down?

The strategy is to find a commit from some point in the "distant" past where the feature works. Then, test a commit from halfway between that date and today…. And then you keep going to the commit half-way in between your "known to work" commit and your "known to be broken" commit until you find the exact day where it broke.

If you started from a point 256 commits in the past, it would take no more than 8 tests to find the exact commit that broke it.

[snakesrules94]

Would you be able to test some bugfix-2.0.x commits to narrow this down?

Hello,
sure , will do it starting from 1st of june , just after the 2.0.8.2 release to now .

[snakesrules94]

first check this afternoon :

• commit 74be64a from 01/06 ==> ok , both steppers are turning
• commit 733d5fd from 04/06 ==> NOT OK , only stepper 1 is turning
• commit 420d5b0 from 08/06 ==> NOT OK , only stepper 1 is turning
• commit 8e06e9c from 15/06 ==> NOT OK , only stepper 1 is turning
• commit 03a4697 from 30/06 ==> NOT OK , only stepper 1 is turning

To be continued ...

[snakesrules94]

Hello,
seems i've found something :

`commit 6131d2c
Author: ldursw [email protected]
Date: Fri Jun 4 00:38:10 2021 -0300

🔨 MKS Robin E3 for HAL/STM32 (#21927)`

result OK , both steppers are turning.

Next commit in log :

`commit eea9b6d
Author: Giuliano Zaro [email protected]
Date: Sat Jun 5 03:02:37 2021 +0200

🐛 Fix MMU compile with >5 EXTRUDERS (#22036)`

result NOT OK , only steppers 1 (T0) is turning .

[snakesrules94]

Hi again , i've made a quick & dirty test :
took the latest bugfix , reverted the changes in planner.h and planner.cpp from commit eea9b6d and both steppers behavior seems ok ( quick test with an m302 P1 followed by a 5mm extrude with T0 then T1 just to see the steeper turning ) .

Edit : printing a cube in mixing mode OK .

[Markeydoo]

Having the same issue in 2.0.9.1.
If I set #define EXTRUDERS 2 and #define SINGLENOZZLE both T0 and T1 work but will not Mix.
If I set #define EXTRUDERS 1 and //#define SINGLENOZZLE and #define MIXING_EXTRUDER, T0 works but T1 never engages.
Thanks

[snakesrules94]

Hello, i guess there is something related in the DISABLE_INACTIVE_EXTRUDER modification ,not re-engaging the second stepper when selected.

[Markeydoo]

I have it working with 2.0.8.2 thanks
Does anyone have it working with 2.0.9.1?

[snakesrules94]

I have it working with 2.0.8.2 thanks
Does anyone have it working with 2.0.9.1?

Hello , you could always try this : #22166 (comment)
but as i' don't know the potential side effects , i would not recommend it .

[Vertabreak]

same issue with the A20T mixing_extruder, E0 works but as soon as you change vtools to anything none of them work.

if you comment out this problem solved.
//#define DISABLE_INACTIVE_EXTRUDER // Keep only the active extruder enabled

[thinkyhead]

Yeah, I have been looking with suspicion at DISABLE_INACTIVE_EXTRUDER for some time. I'll also look at the changes from the referenced commit above.

[Markeydoo]

Unable to Disable_Inactive_extrder with Mixing hot end.

It is working in 2.0.8.2. Mixing Hotend, E0 and 1 both work, I have also installed BLTouch and 2 Smart Filament Sensors and all are working.
I am also able to control E0 and E1 and Bltouch through my TFT35.
Mark

[Vertabreak]

//DISABLE_INACTIVE_EXTRUDER
corrected the issue on all my machines with mixing_extruder.

[Markeydoo]

What was changed from version 2.0.8.2 to 2.0.9.1?

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[aes92000]

i have BTT Octopus v1.1 board
i am having same issue with the mixing extruder and E1 not working.
i can setup VTools and screen ratio changes per tool selected but only E0 operates

using 2.0.9.1 with defined board and pins
2.0.8.2 does not have correct defined board for my setup

//DISABLE_INACTIVE_EXTRUDER does not correct issue for my setup

as single nozzle and extruder 2 works great but no mixing capabilities.

[DerAndere1]

To track down the error further: does it help to change the following in current bugfix-2.0.x to get mixing back?

Marlin/Marlin/src/module/planner.cpp

Line 2243 in 6dc056f

REPEAT(E_STEPPERS, ENABLE_ONE_E); // (ENABLE_ONE_E must end with semicolon)

change it to

 REPEAT(EXTRUDERS, ENABLE_ONE_E); // (ENABLE_ONE_E must end with semicolon) 

In addition, do not define DISABLE_INACTIVE_EXTRUDER, so you should have in Configuration.h:

//#define DISABLE_INACTIVE_EXTRUDER

After updating, send M502, followed by M500 just to be sure.

[github-actions]

This issue has had no activity in the last 60 days. Please add a reply if you want to keep this issue active, otherwise it will be automatically closed within 10 days.

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This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.