Flow Chart

3D Printer - Fortus 250mc

Quick Links

3D Printing Guidelines • Material Properties • STL Upload Form
Exporting STL Files from SolidWorksExporting STL Files from CREO
Using Insight to Calculate STL Volume • Using Insight to Scale STL Files


Introduction

One of the easiest machines in the lab to use, this Fused Deposition Modeling (FDM) 3D Printer rapidly prototypes parts and even entire assemblies out of white ABS plastic. This is no hobby-grade desktop machine; the Stratasys Fortus 250mc will pleasantly amaze you with its fine resolution, good finish, and strong intra-layer bonds. Thanks to the support material, which provides a foundation for overhanging parts, designers don't need to worry about positive drafts, holes in sidewalls, and other manufacturing details.



How to Start

  1. Read the 3D Printing Guidelines and prepare your design using your prefered 3D Modeling Software (SolidWorks, CREO, Rhino, Alias, Google SketchUp Pro, etc).  Use your home computer, Nord Lab, Reinberger Lab, or another lab on campus to prepare your design.  There are only a small number of computers at think[box], and they are to be used for running machines, not preparing designs.
     
  2. Using your prefered 3D Modeling Software, export your 3D Model as an STL file.  As a convenience we offer a tutorial for Exporting STL Files From Solidworks, and a tutorial for Exporting STL Files from CREO.
     
  3. Determine the volume of material (in cubic inches) of your part.  If your software can't do that, then come in to the lab and follow our tutorial on Using Insight To Find STL Volume.  Alternatively, you can use the free online Netfabb Cloud to calculate volume in cubic decimeters, and multiply by 61.02 to get the volume in cubic inches.
     
  4. [OPTIONAL] If you need to scale your part before submitting it, then come in to the lab and follow our tutorial on Using Insight To Scale Your STL File.
     
  5. Upload your STL file using our online form.
     
  6. WAIT.  You will receive a confirmation email within 72 hours, to verify your submission was received.  Then, you will receive another email when your part(s) are ready for pickup and payment.  Expected turnaround time is 3-5 working days.  Parts are generally run first-come first-served, however sometimes jobs are run out of order, for a variety of logistical reasons.  Please be patient and wait for the email.

File Format 

The 3D printer takes STL files, the most common 3D file format.  When exporting STL files from your modeling software, if you get an option to select a resolution, there is no need to go smaller than 0.001 inches.  The resolution of finished parts on the Fortus 250mc is 0.0095 inches, so increasing the STL resolution much beyond this won't result in increased part resolution.


Material

The material used is a proprietary ABS plastic called ABS-Plus P430. Material properties such as Tensile Strength and Flexural Modulus are listed in the material datasheet.  At this time the only available color is white (ivory).  Costs are based on the total number of cubic inches of modeling material your part will use, with rates published below (see explanation of pricing rates):

Material Slice Height Regular Price * Undergraduate Price
ABS 0.013 Inches $22.50 per in3 $11.00 per in3

* Regular price is a guide price only, actual cost may vary depending on complexity of build.  Contact Dr Malcolm Cooke (mnc@case.edu) with questions.


Technical Details

Layer thickness is 0.013 inches.  Parts are produced within an X-Y accuracy of ± 0.0095 inches, however accuracy is geometry dependent. Achievable accuracy specification derived from statistical data at 95% dimensional yield.