Text engraves the object benath it, even when it is on the top

[bahaa]

I own a bambu lab A1 and it is the selected device on bambu studio. (unrelated to the issue)
I have the following issue I am not sure how to explain it but I will try.
It can be replicated fairly simple.
Create a Primitive Cylinder, scale it to 250x250x4, add text sample on it using 20mm for example and place it on the top.

if we slice it and look at the 40th layer at 8mm we can see that the text is barely doing anything to the surfice which is expected since it starts above the surfice.

Adding a height range modifier, with ironing from 7.8mm to 8mm will fix this slight distortion on the top.

Ater adding ironing. with the following values

We can no longer see the distortion

Now if I resize the text to 40mm and keep it on the top, it starts to effect the surfice on deeper layers. in this case from 7.4mm

and ironing has no effect now

What is this effect called and how can I get rid of it?
My goal is to have a prefect ironed surfice and to have the text on top of it.
I hope I have explained this correctly.

Note:
The example is attached to the topic.

Assembly.3mf (107.5 KB)

[MaxThreeD]

Hi, it looks like you can disable this effect by enabling the Strength → Top/bottom shells → Interface shells option, either at the Assembly or Global level.

(The text is .02mm into the top of the cylinder… not sure that matters, but I moved it JIC.)

You don’t really need the height modifier either, just enable ironing on the “Cylinder” object (in your example).

Although even in your example it was applying ironing… those are the fine lines on top in the preview, perhaps more obvious when stepping through the g-code for that layer (using bottom horizontal slider). It was just skipping around the text… which is maybe what you meant.

HTH,
-Max

[bahaa]

@MaxThreeD

Interface shells

Thanks for replying.

You don’t really need the height modifier either, just enable ironing on the “Cylinder” object (in your example).

Yeah I had a more complex case in my 3mf just wanted to replicagte what I have done,

you’re right the ironing is there. what I meant by no effect it doesn’t get rid of the disturbance caused by text into the lower layers.

as you said

It was just skipping around the text… which is maybe what you meant.

from googling I understood that I need to enable Developer mode for interface shells option, I will give it a try and update.

thanks!

[MaxThreeD]

Ah, sorry, didn’t realize it was a “developer mode” option. Between that and “advanced” it’s hard to keep track of who sees what. I having options.

-M

[bahaa]

This option worked great for me thanks.