PDMS - Cliff vs Waterfall

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KNSCi
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PDMS - Cliff vs Waterfall

Post#61 » Wed Sep 03, 2014 2:43 am

We can also go with Cliff method to save on sylgard in acrylic vats, right? if we find appropriate meniscus dam device...
@mikej, question came up with an associate today, if we're always printing at 30µm, is it reasonable to consider designing an insert for the exposure area which would allow a cured pdms to be rotated when it gets fogged? by visual swag, if such an insert was square, one could get 4x the usage in the 30µm scenario...
ZLab3d, printing with B9Creator 1.1 & 1.2 since 2013

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PDMS - Cliff vs Waterfall

Post#62 » Wed Sep 03, 2014 8:45 am

Good question about the 30 micron exposure area.

It's time to replace my PDMS layer (this will be my first re-coat), and a similar thought occurred to me: why not just cut that 1/3 section of the pdms out of the vat, and only replace it?

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ROSITAGIOIELLI
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PDMS - Cliff vs Waterfall

Post#63 » Wed Sep 03, 2014 10:09 pm

Hy permalink sorry but bigger is better! Ha ha and sorry yes is true in page 16 there is a dam pic but was difficult to understand what serve it before this topic!

weechan
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PDMS - Cliff vs Waterfall

Post#64 » Fri Sep 26, 2014 4:49 pm

hahaha... just assembled the v1.2 yesterday and that black piece of VAT DAM is really a puzzle to me.
In the inventory list only only mentioned a bit and no full instruction of the usage, so now I finally understood what is it used for!

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Robert Howle
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PDMS - Cliff vs Waterfall

Post#65 » Fri Sep 26, 2014 5:18 pm

This is a great example why spending some time reading the forum (go back a few months) goes a long way to understanding, not only the operation of the B9, but the development of mods and the reasoning behind them.

Robert
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PDMS - Cliff vs Waterfall

Post#66 » Sat Sep 27, 2014 5:06 am

Folks, can you advise whether this vat needs recoating? This would be my first one.

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Robert Howle
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PDMS - Cliff vs Waterfall

Post#67 » Sat Sep 27, 2014 5:55 am

Kinda depends on what u are printing and where is is on that PDMS. That is why I have two vats (must recalibrate if u swap vats) I would save that one for smaller items like parts, etc. before I recoated.

Robert
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benmisenar
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PDMS - Cliff vs Waterfall

Post#68 » Tue Sep 30, 2014 8:31 am

Hey Mike,
Any chance you guys could add cliff method instructions to wiki for ease of use?

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Robert Howle
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PDMS - Cliff vs Waterfall

Post#69 » Tue Sep 30, 2014 10:30 am

Go to this thread and watch the video. I know it shows the PDMS saver method using tape, but the methodology is basicly the same. Note that it is done with 20ml and on a smaller vat than the new ones. Pretty sure u need to be doing it with 30ml. Someone correct me if I am wrong. I still do the full vat coating myself.

http://www.b9c.com/support/?mingleforumaction=viewtopic&t=958.8
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TAJS
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PDMS - Cliff vs Waterfall

Post#70 » Tue Sep 30, 2014 11:35 am


I still do the full vat coating myself.



May I ask why you coat the entire vat?

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akgold
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PDMS - Cliff vs Waterfall

Post#71 » Tue Sep 30, 2014 5:05 pm

you don't have to if your using the cliff method but if you aren't you have no choice it needs to cover above the window at level and so it takes more to accomplish that. This is the reason for the PDMS saver method. it holds less material. after the dam is removed you will need to cut it off on the deep side leaving about about 3/8ths inch into the deep area. then add a small amount after cutting to seal it I usually just add enough to spread across the cut and up the sides by tilting it to hold it in place the rest of the vat is bare.
I'm so far behind I think I'm First !!

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behold3d
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PDMS - Cliff vs Waterfall

Post#72 » Wed Oct 01, 2014 2:07 am

i dont add extra pdms after i cut the cliff. I never have any problems.

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Robert Howle
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PDMS - Cliff vs Waterfall

Post#73 » Wed Oct 01, 2014 8:10 am

Cover entire vat because I like it that way, is the only reason.

Robert
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behold3d
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PDMS - Cliff vs Waterfall

Post#74 » Wed Oct 01, 2014 8:54 am

That sounds like a song title Robert :-)

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Robert Howle
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PDMS - Cliff vs Waterfall

Post#75 » Wed Oct 01, 2014 11:26 am

Yea if I could only come up with the "bridge".
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