Excessive Purge New Print

Bambu Lab A1 Series General Discussions
1

*BAMBU A1
*ISSUE HAPPENS WITH STOCK FILAMENT & PRINTER PROFILES

Recently I’ve been having a issue with the printer purging a excessive amount of filament when starting a new print…

By excessive I mean it’ll Purge filament for 30 seconds or more sometimes

I don’t remember it happening when I first got the printer. But initially I was just using PLA filament though. Normally I usually use either PETG or TPU, and with both of these filaments I have the purging issue.

I thought it may have something to do with some of the settings that I had changed in the profiles, but even when using the default filament & printer profiles I have the same issue.

I’m not sure if it would be helpful if I attached some type of LOGS or G-Code…

If I export the G-Code I noticed in the starting section there are a ton of “flush” lines.

Here is a WeTransfer link to the G-Code file. It will not allow me to attach it here on the Forum and if I try to insert the starting g code in a code block for some reason it puts it all on one line it’s not formatted correctly…

2

It purges the old filament out of the hotend.
Then it purges again to get the flow rate.
It makes a purge line & calibrates the flow rate again…
then the print starts.

3

Yes I understand the starting procedure of the Bambu Labs printer…

When it does that initial purging it will literally Purge filament for at least 30 seconds straight and forms a humongous blob of filament.

There is no way this is normal. As I mentioned, when I originally started using the printer granted with PLA and not PETG or TPU, it only purged 1/10 or less then what it purges now…

1 Like
4

Don’t know what to say…I’ve had my A1 Mini a year & it’s always done this.

1 Like
5

After updating my machines to the latest firmware I’ve also noticed excessive purging creating large blobs but only on my A1 Mini

6

i find the A1 mini purges more than it should in my view .

1 Like
7

IMO this should be optional. There literally should be an “ALWAYS ASK” setting. In case of “DON’T” the printer should only be allowed to purge for 3 seconds max. I’ve never seen a filament not primed within such a long time.

8

after new fillament is added and old fillament is purged ( around 1 min ) before it starts printing a new project ( i timed it ) it purges again for 3 mins 27 seconds
thats a lot of wasted filament . i have the A1 mini ( a month old )

9

Thank you for posting this question, were you able to resolve the problem? I started experiencing this same issue yesterday and after checking all of my settings, and testing the an old, reliable print file I still have the same issue and cannot pinpoint the cause.