bear030
Posts: 3
Joined: Wed Nov 09, 2016 10:20 am

Infill density variation along X-axis

Hi There

One thing I really like about Simplify3D is the variation of processes you can use between layers. Its going to revolutionize my printing!

However I have a model that has 2 screw points at the back which I would like to print 100% density, the rest of the model can be 20% infill density as normal. is there a way I can vary the density using different processes but along the X-Axis, not the Z-Axis of the layers?

The 3D Knot example in the support area is great but it only works if your changes are on the z-Axis.

I can't rotate the model because it simply won't print that way, there would be more support than model to print and i'm working to tolerances.

Any help on this or work around tips would be greatly appreciated.

Bear
CompoundCarl
Posts: 2005
Joined: Wed Aug 05, 2015 7:23 am

Re: Infill density variation along X-axis

I've done this a few times. I just split the model where I want to make the change, then use S3D to assign different settings to each part of the model (they will be separate STL files once you split them where you want)
bear030
Posts: 3
Joined: Wed Nov 09, 2016 10:20 am

Re: Infill density variation along X-axis

OK, so that seems like an obvious way forward that i should maybe have known about. So just as if you were using dual extruders etc, i can just split the obect and apply a different FFF to each part.

TY for your help.
Ram
Posts: 3
Joined: Tue Nov 01, 2016 11:27 pm

Re: Infill density variation along X-axis

Hi there, this is very interesting, so I thought I would give it a shot. I modeled a regular box 25mmx50mmx25mm and split the box diagonally.

I was able to split my object in my 3D modeling Software into two parts. I then exported each part separately, each its own STL file. and Then I imported them to S3D again separately. I was able to assign different FFF settings to each part, and I even aligned that parts to seem as one whole object.

However, when I went to check the slice "prepare to print" it was very obvious that the slicer printed them as two separate parts. As in: the surface that joins both parts together (where I made my split diagonally) was being printed. Therefore, there was this interior diagonal wall being printed within the box. It did not print as if it was one solid piece.

Am I doing something Wrong? can you please assist.
User avatar
dkightley
Posts: 2405
Joined: Tue Mar 10, 2015 4:09 pm

Re: Infill density variation along X-axis

The only thing that is wrong is your expectation! You appear to expect that the slicer will magically merge two separate prints that happen to be placed so they touch.

Unfortunately, S3D does not have this ability. What you are seeing is exactly what you have set up....two parts controlled by different settings. The only connection is that the slicer is preventing the print head from hitting the other part by actually printing a line from one part, then a line from the other part....and so on.
Doug Kightley
Volunteer at the National Tramway Museum http://www.tramway.co.uk
Railway modeller and webmaster at http://www.talkingtgauge.net
bear030
Posts: 3
Joined: Wed Nov 09, 2016 10:20 am

Re: Infill density variation along X-axis

Hi There

I have also tested this now to see if it works. So my problem is that I have a square but with a block on top of it.

If I just changed the profile at a certain line height, whilst the print looked OK, it seemed to create a weak point where I went for 20 to 100% infil. It was as if the part got split into 2 parts with a weak join.

If I went the 2x STL model way then I got an even worse join just like you just mentioned. It seemed to create a wall in between the parts which meant you could easily snap the top part off form the bottom part.

Not sure if there's a setting to stop this in S3D but I have not found it yet.

So far the compromise has been to just up the overall infil to about 30% and test with different patterns. Ironically Cura has been able to create a way better model so far doing this with little in extra print time compromise. So I resolved the issue that way for now. In fact by upping the infill CUra prints a way better model in all aspects at the moment. I am trying to continue to build a better profile in S3D so i can move over to it for all my printers tho.

Return to “General Discussion and Tips”