uPrint Plus

From ProtoLab Wiki
uPrint Plus in the Idea Shop Prototyping Lab

The uPrint Plus developed by Stratasys, Ltd. is a (FDM) machine also known as a 3D Printer, which is ideal for models of parts that need to mimic the strength and detail of plastic injection molding. The uPrint Plus extrudes layers of ABS thermoplastic about 0.010 inches thick that stack up to form a 3D model of the desired part. The uPrint Plus has at least 10 different colors of ABS to choose from.

General Stats:
Material : Acrylonitrile butadiene styrene (ABS)
Maximum Part Size : 203mm x 203mm x 152mm (8in x 8in x 6in)
Layer Thickness : 0.254mm (.010in)
Strengths
  • Strong engineering plastic
  • Soluble Support
  • Multiple densities: Low, High, and Solid infills
  • Reliable continuous printing
  • Cheapest 3D Printer material
Weaknesses
  • Monochromatic: One color per part.
  • Highest Resolution 0.010"
  • Added cost of support material


Processing


Main Article : Processing 3D Files
Good STL in Netfabb

After you have designed the 3D model of your desired part, export the part in the STereoLithography (.stl) file format. The STL format describes only the surface geometry of the object instead of the object as a whole. Then open the file in the Autodesk Netfabb software to repair the file.

We will only process STLs which have:
1 shell per continuous part
0 border edges
0 invalid orientations
0 holes.

Even if Netfabb reports no invalid orientations, if we see red triangles in repair mode there is a problem with your model. Print at your own risk.

Fixing a File

Main Article : Fixing STLs

Students are welcome to use any of our computers for fixing their files in Netfabb or Rhino.

Here are some tips to get you started at home:
Ideally in Rhino you want one closed polysurface before meshing.
NetFabb is better at meshing than Rhino. Consider opening the 3dm file in NetFabb to generate the STL instead.
Default repair is decent at fixing holes, border edges, and invalid orientations. Then try using boolean join to reduce shells down to 1.
If boolean join results in multiple shells then most likely the shells are not contiguous. Consider deleting extra shells in model.
Extended repair wraps an existing STL in a new mesh. This can severely alter geometry and result in thin walled sections.

Printing a Part


"Main Article : Printing a Part"

Once a file has been processed and is ready to be printed, find a shop supervisor to help add it to the queue. The length of the queue is highly variable, and the time it takes to print a model may range from a few days to being ready by the end of the day it is submitted. Keep in mind that the UPrint queue is very full during finals, midterms, and the time surrounding IPro Day. An estimate of queue length and a time to come pick up the part will be communicated to you once your part is added to the queue. Once a part is successfully in the queue, it is ready to be printed. The average part takes about 2 hours to print, while a very complex part could take full days to print. The webcam livestream on the IdeaShop wiki can be used to check the progress of your part.

Cleaning Parts

"Main Article : Removing and Cleaning a Part"
The chemical bath used to clean support material off of printed models.

Once the model has been successfully created, it is removed from the printer and separated from the printing tray base. From here, it is placed in a chemical bath in order to remover the support material in a way that does not affect the model. Please allow 1-3 hours for the model to sit in the bath, depending on the complexity of the model, in order to successfully remove all support material. Once this process is complete, the part is ready to be picked up by the creator.