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bolsoncerrado
06-03-2015, 03:42 PM
How to save on material costs
Tutorial on how to hollow out your model




So, you made a cool project and you want to get it printed on a high-end 3D printer that captures all the details of your sculpt.

Because these printers print your models completely solid, your prints might require a lot of material which quickly increases the price to a point that you are having doubts of having it printed.

With this simple 4 step tutorial I’ll show you how you can very easily bring down the amount of material required to print your model by hollowing it out!

You’ll need a free copy of Meshmixer, if you don’t have it, you should get it here:
http://www.meshmixer.com/
Believe me, you want it, it’s a great little tool that is capable of doing incredibly complex operations.

Now, the tutorial itself:



Load the Model -> click "Edit" -> click "Hollow"



https://lh6.googleusercontent.com/uKurUY-g9RPSt94-a19wy6za48Vr1A-3s9n-EouNWVZd2CydB_4cyFEQjlDUzWMR2tS_7nVsQVCm0iOPCe0JrL taC2U6YZt9_8rtJEPiubF8KVEQyGsBFtx0EEMabXdAkUYIhOg




2. Then select how thick you want the walls to remain, in this case I was planning on printing on the Form 1+, so 2 mm was good enough for me.



https://lh6.googleusercontent.com/GB9CdpKRHHUK6hj4ihw30IjB3dVNUjWmtZUG0S34TY1Xpo3Mrs L5m8Pit0bzLED_7fN0G2XsYotCwL_oI-Y3QFnNTFqUN1KlDmO41LMJy1w7dxg6lqcEJ5iEt4PFN0rRHfpK 8gE



3. Before accepting, make sure that you add some holes to your model by double clicking the surface of your model where you want the excess material to come out of. If you misplaced a hole, you can easily remove it by double clicking the little red globe in the middle of the green cylinder.



https://lh6.googleusercontent.com/JdTE9Oj3RJctks2FKYZUz_aK7pKV6lZPmOwFUVv2xzQXBHwh5t eYavCKjqL5qejxJ7jPWyQbPrEiL3O7qS2o6dnPNzBh-ZIROhCby9loVC0JeaKMEx8uWAUW7Dwb8UrEjRm-bmI



4. Now, simply click “Accept” and you’re done, it’s that easy!


Now the difference between material amounts before and after!




Original model

https://lh5.googleusercontent.com/O0GFsEJCgEVGBTWsEDR90HZYwEapjZveRTeOAUWShhYT7NsDQO fUec1OGjXqu3xVtvR0enzlDaTUx5UN_-k3Zuhl9VomnYLjzT6OGtbtvcTxPabk6bqg6NlSYM3v3rPMFzTF up4

After hollowing

https://lh6.googleusercontent.com/_F3toaZhVuNt-PUOb4-hNI2APuKRhpHHMBL5unUUz2gc4Tp-hQMX5IfxjuiImnhcHAKj9Sx5iijgstzSPBic3CUuCP7-OzYCd0n8yeUfP8aZllU_luFb_lnpsJprcMyQEbjEeaA





Finally, I do want to add that I added internal supports just to make sure the entire print would work out correctly so the final volume turned out a bit higher then 20.0 mL


I hope this tutorial was useful to you guys! Here is the final result:


https://lh4.googleusercontent.com/xmpCIBA0YRdhS4oPRYpoO2iSMjncVyk5tnPHvLnJnP4I49T_a1 qadeJCX4dxMVkSjnWY21ArUbQl9HekCSHgHBOYQ6CtTDv3Y9g7 lsMUR5QcSZ8adLtJWavJGnV2qdYWF7N63e4





Source
(https://www.3dhubs.com/talk/thread/how-save-material-costs-tutorial-how-hollow-out-your-model)

Daby
07-13-2016, 01:30 PM
Can you tell us by how much percentage the filament uses is reduced if you use this technique of "emptying" a model? Have to say that it's quite easy to do, at first glance. So, that even I, a beginner could handle it.

bolsoncerrado
07-13-2016, 02:07 PM
It will depend on the model, of course, but it can save you not only filament but print time!

Daby
07-13-2016, 02:32 PM
It will depend on the model, of course, but it can save you not only filament but print time!

For a 25cm tall model, how long do you estimate the printing time will be?

bolsoncerrado
07-14-2016, 09:09 AM
It does not matter how tall. It matters about its design. A 1mm diameter 25cm tall cilinder which is hollow will print faster than a multicurve high density poly which is 20x20x25....

Daby
07-14-2016, 12:49 PM
It does not matter how tall. It matters about its design. A 1mm diameter 25cm tall cilinder which is hollow will print faster than a multicurve high density poly which is 20x20x25....

Many thanks for clearing this out. I would get in touch with you if more questions arise.

Susanne
04-05-2019, 02:35 PM
Here are some factors I have found helpful to consider:

Print Time - Size, support material, gcode artefacts, essentially anything I can do to reduce time.
Post Processing Time - Less support - less cleanup. Optimizing bed adhesion can save time if print lots of parts.