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Do you have any specific process recommendations to achieve support for the parts hanging above 45 degrees, using open source software?

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  • $\begingroup$ Hi VampishWolf, welcome to 3D Printing.SE! Sorry, but this question cannot be answered as SE is not about product recommendation please read help center and take the tour. All slicer software applications are able to do this for you, some are free (e.g. Ultimaker Cura, Slic3r, etc.). It will be a setting in the huge pile of settings to set the support angle. Alternatively you can create the supports in the program you designed the object in or open the model in a program that can add or change the design. $\endgroup$ – 0scar Jun 3 '19 at 8:32
  • $\begingroup$ As it stands your question is a bit broad so could you clarify your question with a specific example, using a model, images, diagram? We can't really recommend software brands, but process recommendation is permitted. BTW, don't any of the other support structure questions answer your question? $\endgroup$ – Greenonline Jun 3 '19 at 13:34
  • $\begingroup$ I thought the slicer software like Cura or Slic3r did that for you, either automatically or with a minimum of effort. There are plenty of youtube videos to walk you thru using either too. In my famity, we (i.e. my wife) are using Cura at the moment. We've only printed 1 part that needed supports so far, it was a file we found on thingiverse and I don't know if it includede the supports or not in the file that she downloaded. $\endgroup$ – CrossRoads Jun 3 '19 at 16:30
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PrusaSlicer has support enforcers you can place on areas that need support.

See this video: Prusa Slicer Support Enforcers.

Automatic supports

There are automatic supports, in the Supports dropdown menu, select Everywhere:

Supports menu - Everywhere is selected

Click Yes in the resulting dialog:

Click Yes in the dialog

Click on the Slice icon in the bottom left:

Click the Slice icon

You will end up with a lot of supports:

Resulting print with supports

However, this method generally results in too much support...

Custom Suport Enforcers

So turn off Supports in the drop down menu, select None:

Supports menu - None is selected

Now, in the Print Settings tab, under Support Material, disable Auto Generated Supports and enable Generate Support Material:

Print Settings - Support Material settings

Then right click on the model and select Box from the Add Support Enforcer menu item:

Add Support Enforcer - Box menu

You can move by clicking the Move button in the left hand palette,

Move button

resize by clicking the Resize button

Resize button

and re-shape the Box as necessary, to support the difficult overhanging parts parts only. Here we can see three boxes have been added - pale blue for the previously added boxes and green for the current box:

Three Support Enforcer Boxes added

And a fourth final Box for the tail:

Fourth Support Enforcer Boxes added

Now, when you hit the Slice button, there will be much less support structure than when using Automatic supports:

Reduced amount of support structure

Parts of the model that the slicer thinks still needs support will be highlighted in dark blue (such as the elbow and back of the head):

Unsupported parts highlighted in dark blue

Add a cylinder support enforcer:

Add Support Enforcer - Cylinder menu

Resize and re-shape as before and move into position below the elbow:

Putting cylinder support enforcer in place

Adding a second cylinder as a support enforcer

Putting second cylinder support enforcer in place

Upon hitting Slice:

Final supports

Now in Print Settings - Support Material - Pattern change it from Rectilinear to Rectilinear Grid:

Print Settings - Support Material - Pattern settings

For prints with curves and details Rectilinear Grid works better, than Rectilinear (which is fine for supporting a plain cube in the air). It is easier to break the support off the print.

Now save your hard work as an AMF file:

Save the enforcers as AMF

This file maintains all of the support enforcers so that they can be modified if the actual print needs some adjustments - without having to re-add all of the support enforcers all over again.

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    $\begingroup$ I've updated your answer for you :-) $\endgroup$ – Greenonline Jun 4 '19 at 7:57
  • $\begingroup$ @Greenonline You've been busy! Nice addition to the answer. $\endgroup$ – 0scar Jun 4 '19 at 8:05
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    $\begingroup$ @Greenonline Perhaps it's better to make your own answer when editing that much though... $\endgroup$ – Jeroen3 Jun 4 '19 at 8:07
  • $\begingroup$ @Jeroen3, Yes, sorry about that but you found the video and I didn't want to take credit for that... :-) I must admit that when I started adding info I didn't realise that there would be so much of it! I expected only one or two screenshots. Lol. But yes, you are right, for such extensive edits, it would have been better for me to refer to your answer and add the process as my own answer. Ah well, next time I will. Thanks for finding the link anyway... it was a useful learning experience :-) $\endgroup$ – Greenonline Jun 4 '19 at 8:13

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