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Feature Request: Filament Wipe After Change Filament #236

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johnelle opened this issue Apr 3, 2021 · 4 comments
Closed

Feature Request: Filament Wipe After Change Filament #236

johnelle opened this issue Apr 3, 2021 · 4 comments
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t:bug Something isn't working

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@johnelle
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johnelle commented Apr 3, 2021

Issues that do not follow this issue template will be closed

Description

Even if the nozzle is clean after I swap filaments the first extrusion is a "blob" but then things continue as normal. I conclude from this that a wipe like the one done on print start is needed for a smooth transition.

Description of the bug or requested feature### Steps to Reproduce

After the final reheat and extrusion of a new filament the machine extrudes a 100mm or so on the table before resuming the print.

Expected behavior:

[What you expect to happen]

Actual behavior:

[What actually happens]

Logging:

[Enter M111 S247 in a serial monitor (Pronterface or Octoprint). Reproduce the issue, then copy the relevant logs here.
For Octoprint you can either user serial.log or copy/paste the output from the terminal. More information: https://marlinfw.org/docs/gcode/M111.html ]

Additional Information

Running Community 6 on stock hardware.

[If you compiled the firmware yourself - Include a ZIP file containing your Configuration.h and Configuration_adv.h files]

[Provide pictures or links to videos that clearly demonstrate the issue.]

[Which exact firmware version did you flash? Provide a link to the download you have used.]
Community 6.

@Sebazzz Sebazzz added the wontfix This will not be worked on label Apr 3, 2021
@Sebazzz
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Sebazzz commented Apr 3, 2021

Sorry, that is not possible at the moment. Marlin doesn't have the hooks to allow filament purge from the touch screen interfacing code. You need to fix this in your process, for now.

@Sebazzz Sebazzz closed this as completed Apr 3, 2021
@johnelle
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johnelle commented Apr 3, 2021 via email

@Sebazzz
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Sebazzz commented Apr 3, 2021

Specify no purge length for the M600 command, and when you've fed filament, give it some time for the filament to droop out before resuming the print. Optionally, but in my experience not necessary, you can have something ready to wipe the nozzle with.

Sebazzz added a commit that referenced this issue Apr 11, 2021
@Sebazzz Sebazzz added this to the Community Firmware Release 7 milestone Apr 11, 2021
@Sebazzz Sebazzz added t:bug Something isn't working and removed wontfix This will not be worked on labels Apr 11, 2021
Sebazzz added a commit that referenced this issue Apr 25, 2021
(cherry picked from commit 129ccb7)
@Z3R0-89
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Z3R0-89 commented Jul 29, 2021

Would love to "fix it in my process" How?

On Sat, Apr 3, 2021 at 9:03 AM Sebastiaan Dammann @.***> wrote: Sorry, that is not possible at the moment <MarlinFirmware#20591>. Marlin doesn't have the hooks to allow filament purge from the touch screen interfacing code. You need to fix this in your process, for now. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#236 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/AADU5PEBBCRWFMJE65HQC3TTG4G3FANCNFSM42KGWJGQ .
-- John Ellenberger Groton, MA

My workaround so far is to change the flow rate to 1% just before the purge ends and once the nozzle starts printing again and touches the part, set it back to 100%. This way, the blob is quite small.

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