Bottom layers lip

Hi All,

I am having an issue with my A1 Mini while printing for example a cube, the bottom layers have sort of a lip. The lips is not huge, it is around 0.3mm but it is sharp and have to be removed manually every time I print something which sticks to the plate. I am using original texture plate. Always clean it with IPA before printing. I remember that my printer was not doing that lip when i got it. Changing nozzle does not help. Nozzle area is clean, maintenance is done regularly as Bambu Lab recommends. I am using AMS Lite and lip is happening from all 4 spools. I am attaching a picture. I do apologize for bad quality however it is hard to take a clear picture of something that small.

Does anyone have a clue what can be done in this case?

You wouldn’t be somewhere in Germany by any chance?

Because that looks like elephant foot. With today having been the hottest day of the year so far, it could have pushed the temps above your usual.
I usually target a build chamber temp of 35-39°C on my X1 with PLA. Only doing PETG today :sweat_smile:

You could try adjusting the elphant foot compensation or a lower build plate temp. Or, if in Germany, … it is cooling down now ahead of the thunderstorms where I am…

Increase the “elephant foot” compensation by about 0.15mm, that should help.

Oh Guys! you have no idea how much you saved me due to post-processing i dont have to do anymore! Many thanks.

@ EnoTheThracian, i am your eastern neighbour :smiley:

However elephant foot happens to me also during the winter so in my case it is not summer heat.

Anyways, thank a lot guys for your help!

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It could also need a bit of +z offset in start g code, these (a1 and a1 mini) tend to need some as they age and develop backlash in the z axis. (my A1 has +0.08mm z offset in it to get a measured 0.2mm first layer with 0.4 nozzle).

It’s more noticeable with 0.2 nozzle where the first layer is only 0.1mm. Without a z offset the nozzle is basically touching the bed on my printer.

That would make sense as the printer was not doing elephant foot when it was brand new. It started to happen after a 9 month or so. Could you please point me to an article to post how to set +z offset?

Does it have to be done on every project g-code or is it something that has to be setup once?

Here’s the wikinon the elephant foot compensation Elephant foot compensation | Bambu Lab Wiki

But since it seems to be a recurring feature, I am wondering if your printer may need some TLC a check of your plate temperatures in the filament settings.

:crossed_fingers: & :four_leaf_clover:

Thanks @EnoTheThracian,

I have already managed to remediate elephant foot by the compensation parameter and it work fantastic.

I would like to try the +z offset setting as mentioned by @flint723 but to be honest i have no clue where to start with this.

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Z offset is done in printer profile settings if you use orcaslicer so only once unless something changes.
In bambu studio it can be done in machine start g code I believe, but might only work for textured build plate. I don’t use bambu studio anymore so not 100% sure.

If elephant foot comp is working might as well continue that.

Another setting (only in orcaslicer I think) you can use is “bottom surface flow ratio” and turn this down, as it needs less flow if the nozzle is physically closer to the bed than expected. Value is like 0.95 for 95%, 0.85 for 85% flow on first layer. Also has to be set each time unless you save a custom process profile.

Thanks all for your help. I really appreciate it.