[BUG] M605 in duplication and mirror mode does not extrude both extruders if DISABLE_INACTIVE_EXTRUDER is defined

[CyberDeck]

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

Yes, and the problem still exists.

Bug Description

I have an IDEX printer with DUAL_X_CARRIAGE set in Configuration_adv.h.
In the Configuration.h is enabled (defined) the DISABLE_INACTIVE_EXTRUDER setting.

If I use both extruders in "full control" or "auto-park" mode I can extrude both extruders E0 and E1.

However, if I enable with "M605 S2 X100" the duplication or with "M605 S3 X100" the mirror mode only the left (i.e. E0) extruder is extruding. The other one is disabled.

Bug Timeline

Dunno. Probably a new bug.

Expected behavior

In "duplication" or "mirror mode" I expect that both hotends extrude and not only one of them.

Actual behavior

Only the left (i.e. E0) extrudes. The other one does not extrude.

Steps to Reproduce

1. Startup printer
2. Send following commands:
   G28
M605 S2 X100
G28 X
G0 X100 Y0 Z5
M302 P1 ; allow cold extrudes for test purpose
G1 E5 F50 ; only E0 extrudes and E1 errorneously stand still

Version of Marlin Firmware

Marlin 2.0.8 (May 9 2021 21:49:50) SOURCE_CODE_URL:github.com/MarlinFirmware/Marlin PROTOCOL_VERSION:1.0

Printer model

EasyFrame3D (a modified ANET A8 with a steel frame and a custom IDEX configuration)

Electronics

BTT SKR PRO v1.1

Add-ons

No response

Your Slicer

No response

Host Software

No response

Additional information & file uploads

If I undef the DISABLE_INACTIVE_EXTRUDER both duplication and mirror mode works as expected, e.g. E0 and E1 extrude synchronously.

[DrumClock]

Ano, potvrzuji chybu.
než to někdo opraví ...... nepoužívej funkci DISABLE_INACTIVE_EXTRUDER pokud chceš
tiskonou v duplication nebo mirror modu.

[CyberDeck]

Yes, if I do not use the DISABLE_INACTIVE_EXTRUDER function everything works as expected.

[mikejr83]

I can confirm that with a MKS Robin Pro and BTT GTR 1.0 this issue exists. It was not present in 2.0.7.2.

[BonusNachos]

Another confirmation on this issue for the gtr

[JesusvtR]

Same problem with SKR PRO V1.2

[FancyChancie]

I can also confirm this issue (using Formbot/Vivedino T-REX 3).

One thing I noticed is that E0 seems to over extrude when I’m duplicate or mirror mode. Almost double extrusion, like it’s trying to extrude the amount for E1 in addition to its own. On single extruded mode, the over extrusion issue isn’t present.

I’ve been fighting with it all day, so I’m glad you found a temporary work around.

[DenisSemenov1970]

This problem appeared after the changes #20130

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