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by tim.yoshi
Sat Nov 15, 2014 8:38 pm
Forum: 3D Printing
Topic: You are still printing prongs 200-500 micron wide? Looks at this ;)
Replies: 2
Views: 1291

You are still printing prongs 200-500 micron wide? Looks at this ;)

3D printed people 20 micron wide! :) Unbelievable. How they do achieved this? http://www.3ders.org/articles/20141115-jonty-hurwitz-3d-printed-nano-sculptures-at-the-same-scale-as-a-human-sperm.html http://www.b9c.com/forum/files/uploads/2014/11/74le9-Jonty-Hurwitz-3d-printed-nano-structure-3.jpg
by tim.yoshi
Sat Nov 15, 2014 8:23 pm
Forum: For Sale
Topic: NuVat by Evert
Replies: 109
Views: 20025

NuVat by Evert

Great! How about any wear signs on [s]PDMS[/s] coating? :)
How about some random lines on model?
by tim.yoshi
Sat Nov 15, 2014 2:59 am
Forum: General
Topic: Sylgard 184 availability & replacements
Replies: 115
Views: 35471

Sylgard 184 availability & replacements

Are you sure that machine haven't skipped the layer? I saw/heard this few times on mine. But it was actually old software and maybe I was wrong shining with torch into the print area to see how it is going.
by tim.yoshi
Sat Nov 15, 2014 2:58 am
Forum: For Sale
Topic: NuVat by Evert
Replies: 109
Views: 20025

NuVat by Evert

Fingers crossed :)

P.S. Survived bare metal sweeper? Oh my god! This is TOUGH!
by tim.yoshi
Sat Nov 15, 2014 2:50 am
Forum: 3D Printing
Topic: layer shift
Replies: 10
Views: 1585

layer shift

Also could be ordinary bumping - if you seriously (or not) bump your printer while @ work.
by tim.yoshi
Thu Nov 13, 2014 6:34 am
Forum: Photo Gallery
Topic: Slight shift of layers
Replies: 7
Views: 1883

Slight shift of layers

I googled this topic and interesting results I found - looks like Ti tested their DLP's with UV and claim that even old models should survive UV at least for 2000 hours. Given 5x decrease in build time that's a lot of prints! Not to say that there is still hope that they improved UV resistance in ne...
by tim.yoshi
Wed Nov 12, 2014 10:25 pm
Forum: Photo Gallery
Topic: Slight shift of layers
Replies: 7
Views: 1883

Slight shift of layers

I'm looking at picture and thinking - maybe it's reflected light from the base plate makes it bigger and blurred? Try to lower base curing time to 5 seconds and see what will happen. Or try the following hack - glue to the build table some orange glass or acrylic - it should not reflect but absorb U...
by tim.yoshi
Wed Nov 12, 2014 10:22 pm
Forum: For Sale
Topic: NuVat by Evert
Replies: 109
Views: 20025

NuVat by Evert

Mike is right - what he talks about I also see the most important to test - while small items is likely easier to separate from some other substances, big cross sections (100 or 70 xy base plate) and very tall vertically identical prints are the hardest to PDMS. If this NuVat will work as it should ...
by tim.yoshi
Wed Nov 12, 2014 10:16 pm
Forum: General
Topic: Sylgard 184 availability & replacements
Replies: 115
Views: 35471

Sylgard 184 availability & replacements

Make sure to try some really tall prints ;)
For example just a straight cylinder 1-4 mm in diameter to the full height of your models (should not add any time to print) - this should be almost deadly to PDMS. Let's see how NuVat feels about it.
by tim.yoshi
Wed Nov 12, 2014 10:14 pm
Forum: Operation
Topic: How improve the build table model adhesion
Replies: 20
Views: 4664

How improve the build table model adhesion

I tried PU - no luck here. Resin sticks to it.
by tim.yoshi
Wed Nov 12, 2014 10:10 pm
Forum: 3D Printing
Topic: Post Process Methods?
Replies: 7
Views: 2192

Post Process Methods?

AFAIK no - prints, if not left overnight will not be hurt. But still I saw real cracking on FunToDo resins if washed in iso for prolonged time (>5 minutes). Same on MJR if washed in ultrasonic fro long time and cured without water. If cured in water - no cracks.
by tim.yoshi
Wed Nov 12, 2014 10:07 pm
Forum: Photo Gallery
Topic: Slight shift of layers
Replies: 7
Views: 1883

Slight shift of layers

So you removed UV filter from lamp or from projector itself? Or maybe color wheel? AFAIK in projector there is 3 UV filters! One on the lamp housing, second on the projector near the lamp assembly and third is on the color wheel. So if you removed only on filter and this gave you 0.2 msm I can't ima...
by tim.yoshi
Wed Nov 12, 2014 12:53 am
Forum: 3D Printing
Topic: image spoilt for microchannel printing
Replies: 29
Views: 4587

image spoilt for microchannel printing

Click reply in the bottom. Then upload image :)
by tim.yoshi
Tue Nov 11, 2014 9:03 pm
Forum: For Sale
Topic: NuVat by Evert
Replies: 109
Views: 20025

NuVat by Evert

Ok, but I see an immediate solution - what if to place sweeper a one bolt to the left on the rail? In this position it will still mix resin and don't touch a glass/window.
by tim.yoshi
Tue Nov 11, 2014 8:12 pm
Forum: For Sale
Topic: NuVat by Evert
Replies: 109
Views: 20025

NuVat by Evert

Wanted to ask - how it stands against tall prints? From PDMS point of view tall prints make much more damage to PDMS correspondingly to their height (actually number of slices). Especially ones which repeat in z-axis i.e. vertical pillar 100-200 mm height. How about that? Somebody tested it with suc...
by tim.yoshi
Tue Nov 11, 2014 7:57 pm
Forum: 3D Printing
Topic: image spoilt for microchannel printing
Replies: 29
Views: 4587

image spoilt for microchannel printing

In my practice I succesfully printed holes and channels 200-250 micron wide on v1.1 machine. You should lower cure time slightly and try again.
by tim.yoshi
Tue Nov 11, 2014 1:40 am
Forum: 3D Printing
Topic: Post Process Methods?
Replies: 7
Views: 2192

Post Process Methods?

I'm using ISO directly in the sonic for more than year now. No problems so far.
Then water curing in UV (ordinary two pcs curing box 72W) for 0.5-3 hours (yes hours, I usually leaving it there for long).
And then blow dry - voila, ready. Dry, clean and nice to touch.
by tim.yoshi
Tue Nov 11, 2014 1:26 am
Forum: General
Topic: Sylgard 184 availability & replacements
Replies: 115
Views: 35471

Sylgard 184 availability & replacements

Regarding last post about nanocoatings - I'm sure it is not it. It was discussed here a lot, but likely it will not work. At least just because principles here are different. It is repellent to WATER, not resin. Also I tend to think that if even some nanocoating will work as it should, it anyway wil...
by tim.yoshi
Sun Nov 09, 2014 10:58 pm
Forum: General
Topic: Sylgard 184 availability & replacements
Replies: 115
Views: 35471

Sylgard 184 availability & replacements

Wow. Revolution in VAT coatings here? If there is still "tickets", "invites for this party" or so I'M IN for sure ;)

Ok, stop hiding away, let us know what is it, or where to buy it, or how to grind it from the moondust?
by tim.yoshi
Sun Nov 09, 2014 10:50 pm
Forum: Operation
Topic: Delay print and sitting after print
Replies: 1
Views: 848

Delay print and sitting after print

I haven't noticed problems from leaving prints in printer for prolonged periods. And if your print feel tacky just try water curing method. After cleaning with isopropanol immediately put in the glass jar filled with water. And place all that into UV oven. Yes, in water. You'll notice how dry, clean...

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