Stratasys J55

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Stratasys J55

About


The Stratasys J55 is a rapid prototyping 3D printer. The Stratasys J55 prints down to 18 micron layers for exceptional detail, complex geometries and very thin walls in full rand of color. PolyJet 3D Printers jet layers of liquid photopolymer onto a build tray and cure them with UV light. The layers build up one at a time to create a 3D model or prototype. Fully-cured models can be handled and used immediately without additional post-curing. Along with the selected model material, the 3D printer also jets a support material specially designed to uphold overhangs and complicated geometries. It is easily removed using a WaterJet. PolyJet 3D Printing technology has many advantages for rapid prototyping, including professional quality and speed, high precision, and a wide variety of materials.

General Stats:
Material : Liquid Photopolymer
Maximum Part Size : 140 x 200 x 190mm (5.51 x 7.87 x 7.48 in.)
Layer Thickness : 18 microns (0.0007 in.)
Price : $0.25 per gram of model material, $0.15 per gram of support material.
Note: For comparison to our other machines, on normal sized jobs (>=100cm3) the effective price is approximately $0.45/cm3 for model material. On small volume jobs, the effective per cm3 price is higher due to normal, per job, material consumption during printing process.
Strengths
  • Easy to remove Support
  • Reliable continuous printing
  • Full color
  • High quality prints
Weaknesses
  • Expensive
  • Can only print solid parts (no infill settings)


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.

  • To use the Full Color Printing capabilities of the Stratasys J55, it is recommended to use a VRML file for your 3D print. STL Files do not save color information.


J55 Part Placement Zones
J55 Part Placement

The J55 has 3 part placement zones: an inner, mid, and outer zone. To optimize placement and reduce build time, parts should utilize the innermost zones first. the This zone optimization will be performed automatically in GrabCAD if auto-placement is performed, but no errors will be shown if the part is left in a slower zone.


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.

Safety Instructions


  • Never attempt to open the printer while it is working
  • Several parts of the printer remain extremely hot even after it has stopped operating. Avoid touching the print block. 
  • Uncured printing material is considered a hazardous substance, requiring  certain precautions when directly handling it. To prevent skin irritation,  wear neoprene or nitrile gloves. If there is any chance that Model and  Support materials might splash into the eyes, wear safety goggles. 
  • Liquid waste from the printer is classified as hazardous industrial waste.  Therefore, printing-material waste must be packaged and disposed of in a  manner that prevents human contact with it and contamination of water  sources.
  • Fully cured plastic parts are safe. They can be handled and stored without additional precautions.

Safety Data Sheets

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 3d print queue can be 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.

Cleaning Parts

Main Article : Cleaning a Part : Form2

Once the model has been successfully created, it is removed from the printer and separated from the printing tray base. From here, the model is cleaned using a power washer to get the jelly like material off of the part. The support can come off using toothpicks, scrapers or gloved hands if necessary. Once this process is complete, the part is ready to be picked up by the creator.

Machine Proficiency


In order for an individual to advance in machine proficiency they must demonstrate ability to perform certain actions or tasks. All levels include abilities and concepts from lower levels.

This section is primarily for student workers.

Level 0

Individual has demonstrated they are capable of:

  • Working the power washer
  • Cleaning off support material

Individual understands the concepts:

  • How prints on the Stratasys J55 are charged


Level 1

Individual has demonstrated they are capable of:

  • Sending a job to print using the job manager
  • Setting up the bed
  • Removing a completed print from the bed

Individual understands the concepts:

  • What different materials are offered by Stratasys J55 and which we have at the shop



Level 2

Individual has demonstrated they are capable of:

  • Changing the model material
  • Loading model and support cartridges
  • Fully print a part without assistance

Individual understands the concepts:

  • Eden Maintenance Schedule
  • How to shut down the Eden


Level 3

Individual has demonstrated they are capable of:

  • Replacing the print heads
  • Replacing the UV lamps
  • Running the built-in test suite


Individual understands the concepts:

  • How to replace the odor filter
  • How to replace the waste container



Location

Location of Objet Eden 3D Printer in the Assembly Area