NuVat by Evert - Testing Results

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mikej
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NuVat by Evert - Testing Results

Post#1 » Thu Nov 20, 2014 2:35 am

Overview: I received a standard B9 Metal Vat from Evert with the glass coated with a thin, hard clear substance. The surfaces had some minor imperfections which probably did not effect the operation.
All tests were preformed on the same printer with resin from the same bottle.


First test:
Ability to release small parts with fragile details.
Cherry Resin, 30 micron XYZ, default settings.
No noticeable difference between PDMS and NuVat. No clouding of either PDMS nor NuVat coating noted.

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mikej
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NuVat by Evert - Testing Results

Post#2 » Thu Nov 20, 2014 2:35 am

Second test:
Ability to print small items with small cross sections (Rings, etc.)
Cherry Resin, 30 micron XYZ, default settings.
Clouding – A repeating pattern was printed 3 times on PDMS and on NuVat coating. PDMS shows significant cloudiness, NuVat coating shows no signs of cloudiness.


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mikej
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NuVat by Evert - Testing Results

Post#3 » Thu Nov 20, 2014 2:36 am

Part quality – PDMS looks good, no issues noted. NuVat coating parts show some signs of release stresses, in particular some layer peeling and part cracking where small areas transitioned to larger areas.

Also noted minor “scratch artifacts” where scratches in the NuVat coating transferred to the print.
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mikej
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NuVat by Evert - Testing Results

Post#4 » Thu Nov 20, 2014 2:37 am

Third (final) test:
Ability to release large cross section items.
Red Resin, 70 micron XYZ, default settings.

This test failed and destroyed the projector.
During the attempt to release the first layer, the glass was ripped off the vat and all the resin poured down into the projector/machine. Not a good day. :(

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mikej
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NuVat by Evert - Testing Results

Post#5 » Thu Nov 20, 2014 2:38 am

I think NuVat may have a place for small items, like thin rings (not sure about thick “signet” style rings) since it does not appear to have any clouding issues. But for larger items we need a better release (cure inhibition) to get a force free release.
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behold3d
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NuVat by Evert - Testing Results

Post#6 » Thu Nov 20, 2014 2:38 am

Love the reporting.

edited: Holy crap! ugh!

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mikej
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NuVat by Evert - Testing Results

Post#7 » Thu Nov 20, 2014 2:44 am

I'm OK with this product being sold, I'm giving Evert permission to do so. But I want his customers to be aware of the possible issues of "sticking" to the coating when printing large cross sectional parts. It's not the perfect pdms alternative, but the "no clouding" feature may make it very useful for certain situations.
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TAJS
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NuVat by Evert - Testing Results

Post#8 » Thu Nov 20, 2014 2:45 am

.....uh-oh

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NuVat by Evert - Testing Results

Post#9 » Thu Nov 20, 2014 3:31 am

RIP Projector. Thanks for the tests Mike!

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NuVat by Evert - Testing Results

Post#10 » Thu Nov 20, 2014 5:43 am

Thank you Mike for testing this out,
sorry for your projector.
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bvwjewelers
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NuVat by Evert - Testing Results

Post#11 » Thu Nov 20, 2014 5:53 am

Yes, thank you for testing and sorry for the damage you took for us all.
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NuVat by Evert - Testing Results

Post#12 » Thu Nov 20, 2014 8:22 am

Wow, man this is good to know. Thank you for your testing this. Even though this will be good for small things I would rather remain using PDMS as I always have 2 extra that are coated and ready to go. Plus it is a Huge risk if damages the proctor.
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NuVat by Evert - Testing Results

Post#13 » Thu Nov 20, 2014 8:26 am

Mike, I have a question..

What if you coat the NUvat with PDMS? I wonder if this will some how have a prolonged effect on the PDMS. It would fantastic if it would make the PDMS last for very long time. Can you test this out for me. I am very curious, may be the Nuvat coating will eliminate the factor that causes the PDMS to get cloudy.
Thank you!
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mikej
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NuVat by Evert - Testing Results

Post#14 » Thu Nov 20, 2014 8:32 am

Simply having a better adhesive for the glass/vat bond would probably help. In that case, the motor would have just jammed from the table being stuck to the glass.

I don't see how any coating on the glass would help the PDMS, but who knows?
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fcort
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NuVat by Evert - Testing Results

Post#15 » Thu Nov 20, 2014 8:55 am

Quote from mikej on November 20, 2014, 15:32

I don't see how any coating on the glass would help the PDMS, but who knows?


Yes, sir. I do think it is worth a try. This just be the Ultimate PDMS saver.
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Robert Howle
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NuVat by Evert - Testing Results

Post#16 » Thu Nov 20, 2014 9:04 am

What Mike said. Since the coating would be underneath the the PDMS there is no way it could help. Remember the fogging is from the top down into the PDMS, not the bottom up.

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NuVat by Evert - Testing Results

Post#17 » Thu Nov 20, 2014 3:57 pm

Mike, thanks for taking one - a big one - for the team. I'm doing large items at 70 xyz, so you potentially saved me from the same fate. A miracle coating would be nice, though PDMS replacement has become pretty easy with practice.

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tim.yoshi
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NuVat by Evert - Testing Results

Post#18 » Thu Nov 20, 2014 11:40 pm

Thanks Mike. You did it for all of us. That's what I was afraid of. :( Sad that it will not work on large cross section items, but at least it will help with very tall items. That's still half-win :) Also if jewelers will be able to print some of their items without changing PDMS at all makes it 3/4 win! :)

When I could order one ;)

That projector danger is worrying me all the time - when I have to print large/long items I sometimes scared to leave it alone since it could stick to PDMS/fall from base/ delaminate in process and then it all will start to be massacre to the machine and projector if it will start to leak or splash.
Maybe some additional acrylic "window" on top of the projector/beneath main "plate" could help?
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NuVat by Evert - Testing Results

Post#19 » Fri Nov 21, 2014 4:05 am

I am going to order some to testing ... I find that some materials don't bond to the pdms as much and so those materials could be used on the evert Glass for larger items. I will report when I test that.
right now, If I run a 50 XY platform and simply cover the platform in B9 chery, It will rip the pdms up.I have tried using the hash pattern and the same thing happens. I would truly like to know how to solve that ! On my 1.1 machine, I have the MSM at .7 and on the 1.2 machine I also have it at .7msm . I have played with the MSm to try and solve this, but have not been successful.

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NuVat by Evert - Testing Results

Post#20 » Fri Nov 21, 2014 4:07 am

I would think that a sheet of clear Mylar or clear teflon would work well as a barier to stop any spillage onto the projector.
good Idea Tim.

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