Need help printing counterbores

[MrTitanium]

Hey fellas @Dutch @Tex Koder @Camaroboy383 and other fellow 3d print enthusiasts.

Printing this part face-down as I want that carbon fiber finish. I cannot get a solid finish where the bolt sits on the counterbore face.

I’ve tried many different Z top distances but cannot get the finish required.

PLA with PLA top interface. Slicer is Bambu Studios/Orcaslicer for those wondering.

 

[Tex Koder]

I'm not familiar with Bambu slicer..

But look to see > the Support's
Top Interface Density

Increase it to at least 45-55%

That should get you closer to the finish that you're looking for.

 

[Camaroboy383]

What z distances are you using?.. and I agree with interface density.. I usually run 100% support density..

But my overall suggestion is to not print it upside down..

Your initial layer height looks large as well.. .3?

 

[Surchaufeur]

I thing you need supports to do that but it wont be pretty either. I use cura never tried to print something like that upside down tho. I have a corbin fiber looking magnetic sheet nothing sticks on it

 

[Camaroboy383]

I thing you need supports to do that but it wont be pretty either. I use cura never tried to print something like that upside down tho. I have a corbin fiber looking magnetic sheet nothing sticks on it

It already is supported..

 

[Surchaufeur]

It already is supported..

Support distance then

 

[MrTitanium]

What z distances are you using?.. and I agree with interface density.. I usually run 100% support density..

But my overall suggestion is to not print it upside down..

Your initial layer height looks large as well.. .3?

Z distance is 0.18. If I go less, its difficult to separate.

 

[dure16]

Does a button head screw go there? Why does it matter how that part of the print looks if it won’t be seen in the final application?

 

[MrTitanium]

Does a button head screw go there? Why does it matter how that part of the print looks if it won’t be seen in the final application?

Allen cap screws.

It matters because (a) quality is important and (b) because I know I can do better.

 

[dure16]

Allen cap screws.

It matters because (a) quality is important and (b) because I know I can do better.

Fair enough. I would try any combo of the following things.

Smaller nozzle
Smaller layer height
Higher support interface density
Smaller support Z distance
Smaller support XY distance
More support interface layers
Slower print speed

 

[Camaroboy383]

Z distance is 0.18. If I go less, its difficult to separate.

What layer height are you running?

Using cura?

Xy distance around the support to the model?..

I run .12 z distance with no removal issues.. it's important your interface layer is 1mm thick to ease removal.. it needs to be rigid..

Also what hot end temps?

 

[Tex Koder]

Does a button head screw go there? Why does it matter how that part of the print looks if it won’t be seen in the final application?

It's a matter of pride and the quality of work/production.

Yes, Nobody else will notice that area under the screw head.. specially at that scale.
But he Will know.

And it'll bother him to no end , leaving it in that condition...
Especially when he knows he can achieve better.

 

[Dutch]

Hey fellas @Dutch @Tex Koder @Camaroboy383 and other fellow 3d print enthusiasts.

Printing this part face-down as I want that carbon fiber finish. I cannot get a solid finish where the bolt sits on the counterbore face.

I’ve tried many different Z top distances but cannot get the finish required.

PLA with PLA top interface. Slicer is Bambu Studios/Orcaslicer for those wondering.

View attachment 331418

View attachment 331419

View attachment 331420

If you can share the file it might help us understand what's going on.

 

[Dutch]

Hey fellas @Dutch @Tex Koder @Camaroboy383 and other fellow 3d print enthusiasts.

Printing this part face-down as I want that carbon fiber finish. I cannot get a solid finish where the bolt sits on the counterbore face.

I’ve tried many different Z top distances but cannot get the finish required.

PLA with PLA top interface. Slicer is Bambu Studios/Orcaslicer for those wondering.

View attachment 331418

View attachment 331419

View attachment 331420

One other thing you might want to try is printing it in one color, the color change maybe effecting the print? just a thought.

 

[MrTitanium]

After much trial and error, I have it figured out.

 

[rotauq]

One other thing you might want to try is printing it in one color, the color change maybe effecting the print? just a thought.

nice result!

So what did the trick in the end?

 

[MrTitanium]

nice result!

So what did the trick in the end?

I reduced the bridge flow rate from 1.0 to 0.8mm. It isn’t perfect, mind you, but at least I’m headed in the right direction.

 

[Tex Koder]

I reduced the bridge flow rate from 1.0 to 0.8mm. It isn’t perfect, mind you, but at least I’m headed in the right direction.

That's interesting.
I've never even thought to do that...

I'll have to look into it myself.
Thank you.

 

[Camaroboy383]

Time and patience always wins the war..

 

[Dutch]

nice result!

So what did the trick in the end?

Not my print, you'll have to ask @MrTitanium