Author Topic: Printing the perfect sphere with an Inspire  (Read 4832 times)

Offline dale3dps

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Printing the perfect sphere with an Inspire
« on: August 28, 2014, 11:16:16 AM »
Any type of 3D printing compromises need to be made, in short nearly every model you print will need its own specific settings to reach optimal results especially with a dual nozzle machine.

3D printing is a constant learning curve.  It does flatten out and become a lot easier to print with good results, once you really grasp how it works. Logging the changes you make is key! It is also vital to only change one setting at a time, so you can monitor the results. If it is a large print and you are having trouble, don't print the whole thing every time. Only print the sections you think are causing problems by slicing the part into pieces.

Model size and resolution can play a big part too. A rough guide for different layer height depending on the part size.
  • 0.10, very small parts, up to 5 cm3
  • 0.15-0.20, up to 10 cm3
  • 0.20-0.25, 5-15 cm3
  • 0.25-0.30, 15-30 cm3
Chamber temperature, a lot of issues are directly or indirectly related to this. It can be a challenge to get to grips with. Remember though there is no handbook as to how to print your specific model optimally. No one will be able to tell you, others can give you a guide, but at the end of day it's the operator that has to make the right adjustments for that specific model.

Large flat areas require high heat to prevent warping, hot as you dare to set it. Small parts need to be cool 30-40C. What about a large flat part with delicate pieces on it? Compromise.
Always pre heat your build tray for good raft adhesion, raise the bed to fan height and heat for minimum 5 min. Keeping the door open when doing this for small prints, you only want to heat the bed not the chamber.

Right, now to print the sphere, we printed close to 60 of them over a couple of days before achieving the attached results. By logging all the settings, next time it will be simple. It is possible to even adopt some of the settings to other prints. Why not adopt it to all future prints? Simply put, compromise. To create a near perfect sphere, the support nozzle offset has to be increased. This means the part material is pressed into the support material for a better hold, a better hold means harder support material removal. This and several other setting were changed to achieve the sphere.

The sphere was printed at 0.25, coarse for this sized model, perfect results would be achieved at 0.15-0.20.
Support, 30%, more was not necessary for the sphere.
Infill, 9, just to save material.

The Inspire is a great machine, you will get awesome results very soon.

Sphere pictures [1] [2] [3] [4]

Thanks to Hayden from Clone 3D for the tip.

Edit: Additional photos
« Last Edit: August 28, 2014, 01:39:52 PM by dale3dps »


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