gazaah
Posts: 2
Joined: Mon Feb 01, 2021 4:23 pm

Making objects as solid as possible

Mon Feb 01, 2021 4:56 pm

I was reading a tutorial to make objects more solid by increasing overlap, slowing speed, and increasing extrusion by 150%. When I am doing rapid prototyping, especially with water involved, I want a 3D print to behave more like a solid injection molded part than a honeycomb-filled dainty art piece.

https://www.instructables.com/3D-Printi ... t-Contain/

Has anyone tried to do this in Simplify3D, the whole SOLID BLOCK OF PLASTIC print settings? I was impressed with the Instructable for making airtight prints. I'm not sure if there are any features specific to Simplify3D that would help me eliminate gaps within the print.

I've been a long-time Simplify 3D user, I love the simplicity of the slicer and how hard it is to screw it up when you are new to 3D printing but how flexible and powerful the software is when you want to dial in a specific change or test a setting.

percar
Posts: 10
Joined: Sun May 18, 2014 8:38 pm
Location: Canada

Re: Making objects as solid as possible

Wed Feb 03, 2021 2:31 am

Why not use 100% infill this is like making it solide

zemlin
Posts: 362
Joined: Mon Feb 01, 2016 11:36 am

Re: Making objects as solid as possible

Wed Feb 03, 2021 8:20 am

I have better luck with 9999 bottom layers than 100% infill.
You can fine tune the extrusion multiplier to pack out the path, and also use the scripting to change your extrusion multiplier for solid fill if it benefits from a different multiplier than the perimeters. I have found that to be the case sometimes.

I use this script frequently - tweaking the M221 value when needed. I run single extrusion fill at 50% speed because it can be a lot heaver than the rest of the print (I allow 200%)

Selective Speed and Multiplier
{REPLACE "; feature outer perimeter\n" "M220 S100\nM221 D0 S100\n; feature outer perimeter\n"}
{REPLACE "; feature inner perimeter\n" "M220 S100\nM221 D0 S100\n; feature inner perimeter\n"}
{REPLACE "; feature solid layer\n" "M220 S100\nM221 D0 S95\n; feature solid layer\n"}
{REPLACE "; feature support\n" "M220 S100\nM221 D0 S100\n; feature support\n"}
{REPLACE "; feature infill\n" "M220 S100\nM221 D0 S100\n; feature infill\n"}
{REPLACE "; feature skirt\n" "M220 S100\nM221 D0 S100\n; feature skirt\n"}
{REPLACE "; feature internal single extrusion\n" "M220 S50n\nM221 D0 S100\n; feature internal single extrusion\n"}

keshlam1
Posts: 3
Joined: Tue Sep 14, 2021 6:43 pm

Re: Making objects as solid as possible

Tue Sep 14, 2021 7:00 pm

Hi, folks. Just starting to work with 3D printing, and of _course_ my first actual application needs to be watertight. (And light-tight; it's a piece of photographic equipment).

I saw Zemlin's script, but I'm not sure how one provides this to Simplify3D. Tried blindly appending it to the startup script in the process, and I can't see that it had much effect, so I'm presuming that was the Wrong Place. Could someone provide a bit more guidance?

If it matters, I'm using one of Monoprint's "Select Mini" cartesian printers -- just barely large enough for this first part, *IF* I can get the surfaces to seal.


For what it's worth, I've also considered rotating the part 90 degrees and printing it "on its ear", so the surfaces where a seal is most essential would be edges of the print, which do seem to seal pretty reliably since they're face-to-face. Of course that also puts the weak direction in an orientation where it's more likely to get stresses that could break it,, and it does leave some other surfaces as potentially leaky (though at least some of them are curved, so there might be enough inherent overlap to get a reasonably solid surface). An improvement over what I have now, and I'll do it if I must, but there has to be a better answer.

(Also for what it's worth, suggestions in the Facebook group for this printer have been limited to "Apply a sealant after printing." I don't really like that answer since I don't want to raise further questions about interaction of chemistries.)

zemlin
Posts: 362
Joined: Mon Feb 01, 2016 11:36 am

Re: Making objects as solid as possible

Fri Sep 17, 2021 9:17 am

To add a post-processing script to Simplify, go to the SCRIPTS tab and in the window labeled "additional terminal commands for post processing" - the script code goes there.
DeleteMe1.jpg
In the script I posted, M220 is a speed factor, and M221 is extrusion factor. This is a multiplier to the extrusion multiplier in Simplify, so if you have your extrusion multiplier set to 1.05 in S3D, and script it to be 1.05, you'll have 1.05*1.05 = 1.103

keshlam1
Posts: 3
Joined: Tue Sep 14, 2021 6:43 pm

Re: Making objects as solid as possible

Fri Sep 17, 2021 5:55 pm

Thanks! I'll give that a spin after getting some of the other projects a step forward...

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