The resin that I run in our Cubital (SGC) machine has a dencity of 1.1
g/ml.The old resin (no longer in use) has a dencity of 1.08 g/ml.
Both outside of the desired parameters.
Brandon R. Ferguson - technician
University of Calgary
Department of Mechanical and Manufacturing Engineering
t: (403) 220-4147 f: (403) 282-8406
email: bferguso@acs.ucalgary.ca
Marshall Burns wrote:
> Dear RP-world,
>
> We have a client that wants to prototype and test a water
> flow-measuring turbine rotor. They need a specific gravity of 0.9 +/-
> 0.02 for neutral buoyancy.
>
> What fabricator ("RP") materials can people recommend that
>
> (a) have specific gravity of 0.9 +/- 0.02
> (b) do not swell or degrade in water ("cold" tap water, 40 to
> 75 F), and
> (c) will stand up to continuous free (ie propelled by the
> water, not powered) rotation of about 1850 rpm with short term exposures
> to 2400 rpm.
>
> I know that Cubital has reported successful results with underwater
> rotor testing under much more challenging conditions. Does anyone want to
> recommend specific materials for this application on a Solider, SLA,
> Sinterstation, FDM, or other fabricator?
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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