Bottom layer | 3D Printing | Page 1

calm drum Feb 28, 2025, 2:54 AM

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Hello, recently I’ve been having problems with my bottom layers. My tops are smooth and completely fine, but any raised bottom layers come out scratchy and weird. It was attached to supports but I don’t think this would be the scarring left behind and I had another print with the exact same outcome and it wasn’t attached to supports. If someone knows a fix to this or what I’m doing wrong please let me know, thanks.

My printer is a Bambu p1s and I’m using a .4 nozzle with .08 layer height

teal summitBOT Feb 28, 2025, 2:54 AM

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calm drum Hello, recently I’ve been having problems with my bottom layers. My tops are smo...

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AI Help

It sounds like you may be experiencing adhesion issues with the bottom layers of your prints. To improve this, you can try the following steps:

Ensure that your printer bed is properly leveled. A level bed is crucial for good adhesion.
Clean the build plate before each print with isopropyl alcohol to remove any oils or residue that could affect adhesion.
Adjust your print bed temperature. Different filaments require different bed temperatures for good adhesion. Experiment with slightly higher bed temperatures to see if it improves adhesion.
If you are using a raft, try reducing the air gap between the model and the raft to improve adhesion.
Check your initial layer height and adjust it if necessary. If the nozzle is too close to the bed, it can cause scraping and rough bottom layers.

By following these steps, you should see an improvement in the bottom layers of your prints.

calm drum Feb 28, 2025, 2:54 AM

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These are the results, forgot to send them

torpid shoal Feb 28, 2025, 2:54 AM

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That's supports.

rancid token Feb 28, 2025, 2:54 AM

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I think it's just support remaining on

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Gotta sand it

torpid shoal Feb 28, 2025, 2:55 AM

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I think it's the opposite, I thin the support interface is too low for the first layer of the underside.

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That looks like an overhang that drooped a bit

wraith parrot Feb 28, 2025, 2:55 AM

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up support interface %, increase support z distance likely

torpid shoal Feb 28, 2025, 2:56 AM

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wraith parrot up support interface %, increase support z distance likely

Increase the support gap?

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@calm drum are you using Orca?

calm drum Feb 28, 2025, 2:56 AM

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I’m using Bambu studio

torpid shoal Feb 28, 2025, 2:56 AM

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Close enough

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Under support -> advanced, what is your Top Z Distance

calm drum Feb 28, 2025, 2:57 AM

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.16

wraith parrot Feb 28, 2025, 2:57 AM

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torpid shoal Increase the support gap?

support interface%, makes the gap between the lines smaller so its more consistant where it touches

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maybe its called something different here tho

torpid shoal Feb 28, 2025, 2:58 AM

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calm drum .16

You're trying to print a line with a gap twice as big as your line height

calm drum Feb 28, 2025, 2:58 AM

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Well when you put it like that lol

torpid shoal Feb 28, 2025, 2:58 AM

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Decrease the distance to .08

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ehhh

calm drum Feb 28, 2025, 2:59 AM

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Sorry this is my first week lol, won’t that make the supports pretty hard to remove?

torpid shoal Feb 28, 2025, 2:59 AM

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maybe 0.12 first

wraith parrot Feb 28, 2025, 2:59 AM

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decreasing the support z distance makes it more attached, not less, usualy .2 works for most

torpid shoal Feb 28, 2025, 2:59 AM

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wraith parrot decreasing the support z distance makes it more attached, not less, usualy .2 wo...

I don't think this is an issue of residue

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To me, that very much looks like the lines are drooping on the initial bottom.

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Like an overhang that has not been supported properly.

wraith parrot Feb 28, 2025, 3:00 AM

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i think the support interface was so well attached that it ripped itself apart before partly detaching

calm drum Feb 28, 2025, 3:00 AM

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Should I get some other pictures

torpid shoal Feb 28, 2025, 3:00 AM

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Oh wait, I opened the image fullscreen

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Yeah, I think you're right @wraith parrot

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Take some more pictures @calm drum

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Just to be sure

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I didn't see the perpindicular lines when viewing the image in Discord

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That def looks more like stubborn supports.

calm drum Feb 28, 2025, 3:02 AM

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wraith parrot Feb 28, 2025, 3:02 AM

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yeah, i open most everything in browser

torpid shoal Feb 28, 2025, 3:02 AM

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Also, @calm drum , when you are removing the supports, do not just pull them away from the model

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I grab mine with pliers and very subtly twist them clockwise/ccw against the model

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And I've found that it drastically improves the blemishes of the support.

calm drum Feb 28, 2025, 3:03 AM

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I've been using pliers to wiggle them a bit and take them off but I havent tried twisting, ill give it a shot

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So should I up the Top z distance on my next go?

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Also im not quite sure what or where the support interface % is

wraith parrot Feb 28, 2025, 3:04 AM

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was it easy to remove or hard?

torpid shoal Feb 28, 2025, 3:04 AM

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calm drum I've been using pliers to wiggle them a bit and take them off but I havent tried...

Do not twist hard, just kinda gently nudge it in each direction over and over, after a few rotations, they should (very satisfyingly) just "pop" off naturally

calm drum Feb 28, 2025, 3:04 AM

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wraith parrot was it easy to remove or hard?

Pretty easy

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Nothing took more than a couple seconds to come off

wraith parrot Feb 28, 2025, 3:05 AM

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then i guess reduce, not sure why the support interface would look like that though

calm drum Feb 28, 2025, 3:05 AM

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torpid shoal Do not twist hard, just kinda gently nudge it in each direction over and over, a...

Awesome thanks

torpid shoal Feb 28, 2025, 3:05 AM

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If you are finding that you're having to put any effort at all in besides the rotation, clamp on to another spot and do the same motion there first

wraith parrot Feb 28, 2025, 3:05 AM

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might need to turn on advanced mode for it, there should be a advanced under support with these

calm drum Feb 28, 2025, 3:06 AM

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Any of these?

torpid shoal Feb 28, 2025, 3:06 AM

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@calm drum try out these settings

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I use Orca, so not 1:1, but decipher what you can

wraith parrot Feb 28, 2025, 3:08 AM

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main ones are top interface layers to 3, top interfacing to like .2, top z to .12 for a test

calm drum Feb 28, 2025, 3:08 AM

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hmm, what will change when I up my bottom Z distance to yours? Its more than double mine

wraith parrot Feb 28, 2025, 3:08 AM

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bottom z distance inst applicable, thats for when supports start on prints

calm drum Feb 28, 2025, 3:09 AM

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wraith parrot bottom z distance inst applicable, thats for when supports start on prints

Oh gotcha

wraith parrot Feb 28, 2025, 3:09 AM

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like supporting a F on the inside

calm drum Feb 28, 2025, 3:10 AM

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wraith parrot main ones are top interface layers to 3, top interfacing to like .2, top z to .1...

Sorry I cant seem to find Top Interfacing, I see top interface layers and top interface spacing but not that

wraith parrot Feb 28, 2025, 3:10 AM

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calm drum Hello, recently I’ve been having problems with my bottom layers. My tops are smo...

oh wait, .08 layer height? id try that for support top z distance

calm drum Feb 28, 2025, 3:10 AM

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kk

calm drum Feb 28, 2025, 3:15 AM

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wraith parrot oh wait, .08 layer height? id try that for support top z distance

sorry did you see my message above this, I keep looking for it but I cant find it, would it be called something different for me?

wraith parrot Feb 28, 2025, 3:16 AM

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just top z distance

calm drum Feb 28, 2025, 3:16 AM

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Oh okay

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Ill try it out tonight, thank you guys a lot!

#Bottom layer