Embedded Files
Slicers
Slicers
In this module:
In this module:
you will learn how a 3d model is prepared for printing. By the end of this module you will be able to:
Explain what needs to happen to a 3d model to prepare it for printing
Explain what infill is and why it is needed
Analyze a 3d model and make predictions about what the slice profiles will look like at a given point identifying supports, perimeters, floors and ceilings, and infill.
To complete this module you will need:
To complete this module you will need:
📝📝📝📝 The 4 worksheet pages for Module 9
✏️Pencil
🍎🐕🪑 Print examples set (Download models here to print or ask your teacher for a set)
🟧 Glue Stick
What is a slicer program?
What is a slicer program?
In order for a 3d printer to print your file, the math coordinate points that were created in the 3d modeling program need to be converted into something that the printer can use. When 3d printers print an object, they print layer by layer. To create these layers, we use a type of program called a slicer.
A slicer will take the 3d object and cut it into very thin horizontal slices, often a fraction of a millimeter thick. The software writes code to tell the printer where the item begins and ends at each level, where the inside and outside is, and even adds support material to hold up the print as it is built.
Line types
Line types
When slices are made, the software creates different types of lines of each layer.
The first is called the PERIMETER. The perimeter, like in math class, is the outline of the shape at that particular slice. The perimeter of each slice becomes the surface of the print that you see and feel.
Next is called the INFILL. While the perimeter creates what you see and feel, the infill is everything inside. Sometimes the infill can be completely solid, but more often than not, the object will only be 15-20% solid. There are 3 main reasons for this.
As material cools, it shrinks. this shrinking can cause warping issues. Infill can be adjusted to minimize warping to make sure the print looks like it should
3d Printer filament costs money. The less we can use inside, the cheaper it is to make the object
3d Printers aren't incredibly fast it can often take hours to complete a print, or days for larger object. That's a long time, but they used to be even slower. Less infill means less material it needs to print. That means less time to print your object
One of the most common ways infill is controlled in the program is the infill type. Some infill types are stronger, some print faster. One of the most common patterns is a grid.
Why are supports needed?
Why are supports needed?
The last line type that you will typically see is called SUPPORT. The plastic from the printer is molten hot and sometimes needs extra help to hold itself up as it cools and hardens. Supports are that extra help. They're built outside the perimeters and are removed when the build is finished. It is recommended that supports are used for any overhangs that are less than a 45 degree angle, but that can change based on the design and other printer settings
Support material may or may not be necessary depending on the design of the object but generally if an object can be printed without supports, it will be faster and better looking. Often, supports will just be made from the same material as the object, but many printers, including those used here, can build supports with a different material that makes it easy to remove.
How can you tell where supports are needed?
How can you tell where supports are needed?
Supports are normally needed only on overhangs with angles lower than 45 degrees including long bridges. Imagine the object is made of ice cream that is starting to melt, which parts would need held up so they don't sag?
Look at the following image of a dog that is going to be printed, Where do you think supports would be required? Draw the supports on your worksheet
Creating profiles
Creating profiles
We're going to practice creating profiles. First together, then on your own.
Using the picture on your paper, identify where the print will need supports by drawing them on the picture.
In green, draw the perimeter of each slice (A-D)
In blue, Draw the infill for each slice (you can choose the pattern)
In orange, Draw the support profiles for each slice
Don't lose your background research!
Don't lose your background research!
Glue your sheets into your composition notebook and don't forget to save the work for your webpage later!
Exit Ticket
Exit Ticket
Congratulations finishing module 9!
Please fill out the exit ticket.
Credits:
"Low Poly Golden Retriever" - Beto by flowalistik
"Red apple clipart, healthy fruit" is marked with CC0 1.0.
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