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moggieuk / Happy-Hare

MMU software driver for Klipper (ERCF, Tradrack, Prusa)
GNU General Public License v3.0
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Over Extrusion during first filament load #212

Open HoweCarson opened 8 months ago

HoweCarson commented 8 months ago

I have ran into an issue with a filametrix setup on my ERCF. For some reason during the initial load for the MMU (Typically after a reboot) The MMU will attempt to extrude clear to the nozzle instead of right at the filament cutter location.

My fix at first was to set ooze prevention to 62mm, but this causes every other tool change to error out due to loading the final amount as 0mm (Error is thrown as encoder did not sense any movement)

I haven't been able to figure out why it's over extruding on the first load.

moggieuk commented 7 months ago

If you are using a cutting this is indeed possible. I was considering persisting the "amount of filament" left in the nozzle across reboots but I'm not sure how reliable that will be..

The issue is that HH keeps an in-memory value for the amount of filament left in the nozzle between tool changes. Obviously this is lost on reboot.

moggieuk commented 7 months ago

I'm going to label this an enhancement because if persistence_level is set to 4, then this position should probably be persisted.

HoweCarson commented 7 months ago

Sounds good, now knowing if persistence_level is set to 4 it should not be an issue. I will verify on my current build. I believe I it is currently set to 3.

moggieuk commented 7 months ago

Ok. I've created a fix. It is in a branch called "issue212" so you can switch to it and test. Let me know and I'll merge with main. To switch to issue212 branch:

cd ~/Happy-Hare
./install.sh -b issue212

To switch back to main at any point, just repeat the above with "main" instead of "issue212"

moggieuk commented 7 months ago

I've tested and confident it is addressed. Works with any persistence level. Pushed to main

HoweCarson commented 7 months ago

I have tested as well and did not experience an issue either. Thank you.

On Mon, Mar 11, 2024, 11:19 PM moggieuk @.***> wrote:

I've tested and confident it is addressed. Works with any persistence level. Pushed to main

— Reply to this email directly, view it on GitHub https://github.com/moggieuk/Happy-Hare/issues/212#issuecomment-1990521437, or unsubscribe https://github.com/notifications/unsubscribe-auth/ACV4WNXKSSXEMNPF6FBASETYX2NAPAVCNFSM6AAAAABEGPSLTWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSOJQGUZDCNBTG4 . You are receiving this because you authored the thread.Message ID: @.***>

github-actions[bot] commented 3 days ago

This issue is stale because it has been open for 180 days with no activity. It will be closed in 14 days automatically unless there is activity.