J750 Polyjet 3D Printer
The J750 is a high resolution 3D printer capable of producing rigid acrylic based color models or print in a rubber like material called Agilus 30 in various harnesses from Shore-A 40 to Shore-A 95. The J750 can produce parts containing thousands of colors at a nearly imperceivable layer resolution of 27 Micron for highly realistic prototypes. Accuracy is within 20-85 microns for features below 50 mm; up to 200 microns for larger model sizes.
Use of this 3D printer is made possible by the College of Engineering, Civil and Environmental Engineering, Professor Filipov’s Deployable and Reconfigurable Lab.
Understanding the Technology
PolyJet 3D printing technology uses photopolymers that are jetted onto a build tray in very small droplets and immediately cured with ultraviolet light to build a 3D printed part. Polyjet printing allows for complex shapes, intricate details, delicate features and a high-level realism. The J750 can digitally blend 2 or more materials to obtain an array of features like soft touch over-molding, a full range of color, and even clear and transparent gradients in a single printed part.
Unlike filament based 3D printers, parts printed on the J750 are solid and contain no voids. By default, the support material is only placed where it is needed, on downward facing surfaces. There is no self-supporting angle; any overhanging geometry will require support. Unless a matte finish is selected, areas of a model that face upward will have a high gloss surface finish and areas that face downward, which have been in contact with the support material, will have a matte surface finish.
J750 3D Printer Specifications
The current material palette includes Cyan, Yellow & Magenta Vero rigid opaque, Agilus30 flexible and VeroClear transparent. Digital blending of the material pallet allows for clear parts, flexible parts, color parts, or a combination of these properties.
- Technology - MultiJet Printing (MJP)
- Build Volume X-Y-Z - 19.3 x 15.35 x 7.9 in (490 x 390 x 200 mm) / 2,340 cubic inches
- Layer Resolution - 27 Micron
- DPI: (xyz) 600 x 600 x 1800@ 14μ
- Feature detail up to 200 microns for rigid materials only, depending on geometry, build parameters and model orientation
Availability & Pricing
The Fabrication Studio's 3D printing service is available to U of M faculty, students, and staff in support of the U of M communities academic and research needs. Our J750 rate is $19.69 per hour. We accept payment in the form of a short code transaction only; Sorry, no cash, no credit card accepted. For a quote please submit your STL file(s) via the part submission link found in the navigation bar.
Get More from the J750
The J750 is a highly capable 3D printer. To learn how to get the most out of the machine see the various J750 Guides within the navigation menu bar. Additional learning materials are available at the Ground Connection Knowledge Base: https://sites.google.com/umich.edu/groundconnections.
How to submit a model for a quote
Step 1 - Inspect Your Model
Make sure your 3d computer model can be printed, is of the proper scale, and doesn’t have any errors such as intersecting triangles.
Step 2 - Upload a File
Use the provided link in the navigation bar to submit your model. Make sure the file size is less than 100MB. If submitting multiple files combine them into a single ZIP file for submitting.
Step 3 - Confirm Price/Job
Within 1-2 business days you will receive a quote. 3D printing will not start until you approve the job. Once approved, we will queue your job and send an invoice with payment details and the date of estimated completion.
Step 4 - Pickup Your Part(s)
Payment is due prior to part pickup. We accept payment in the form of a shortcode transaction only; no cash, no credit card. You will receive email notification when your print job is ready to pick up. Please email or bring your approved invoice with you when you come for the parts.
Once approved, 3D print jobs typically take less than five business days to complete. However, no guarantee is given as other factors, such as the size and number of jobs in the queue, can have a significant impact on turn around. Submission of quality error free 3d computer files will speed up the process. We may suggest data modifications, and can help guide you in inspection and repair of 3d computer models, the Fabrication Studio does not repair or work on submitted data. If concerned about timing we suggest you indicate your timeline in the file upload or contact a consultant at the Fabrication Studio [email protected].
Frequently Asked Questions
What type of job is the J750 best suited?
The J750 excels at printing parts that require high feature detail or digital blending of various available materials.
Where does the J750 struggle?
The J750 materials do not provide high parts strength or resistance to harsh environments. Support structure does not dissolve or melt away. Instead it is physically removed so access to internal cavities is a must.
Is part strength isotropic?
Yes
Can I bring my own materials?
The printer is made to use only specific materials which is provided by the Fabrication Studio. No other materials are allowed as it could damage the machine and/or void the maintenance contract.
Can I print transparent parts?
Yes you can, but buffing may be required for best results.
Can I print parts without the support material?
The J750 requires the use of support structure to anchor the part and provide scaffolding for overhanging geometry.
