DIY DLP printer + FEP foil / Utrecht

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EdgE
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Joined: Sun Jan 26, 2014 1:28 pm
Location: Utrecht - NL
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DIY DLP printer + FEP foil / Utrecht

Postby EdgE » Mon Jan 27, 2014 4:31 pm

I was inspirited by a nice movie from Oliveira Jose about a DIY SLA 3D printing device.
This should be my next project!

I didn't want to just copy/paste, I designed the setup a little different:
Top-Down & Bottom-Up in one design & having a smaller footprint, using 2 mirrors:
Image

After about 300 hours of building, this results into the next 'working' design:
Image

Click the picture above for my building blog.

Right now I'm still in a testing phase.
It's still difficult to print something right...
I'm using PDMS, but that will perish also, especially after over-exposure (due to resin left on the vat).
Last edited by EdgE on Mon Oct 27, 2014 5:03 pm, edited 1 time in total.

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PacManFan
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Re: An other DIY SLA DLP printer

Postby PacManFan » Mon Jan 27, 2014 4:36 pm

Glad to see you joined the forum. You might want to try FEP adhesive backed tape as a vat coating. It works much better than PDMS and won't cloud up.

EdgE
Posts: 32
Joined: Sun Jan 26, 2014 1:28 pm
Location: Utrecht - NL
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Re: An other DIY SLA DLP printer

Postby EdgE » Mon Jan 27, 2014 4:58 pm

Tnxs Steve, I've tested 3 vat types till now. You can still see this in the picture above.

On the same vat:
* PolyStyreen w/o any coating
* PolyStyreen with Teflon-tape
* PolyStyreen with PDMS

Unfortunately I was not able to print on these 3 parts at the same time, because the PDMS layer was about 1.5mm higher then the others.
(I wanted to do proper testing, using same conditions on all 3 surfaces.)

Anyway, the main conclusion: all 3 vat-floors sections did work!
Although:
* PS w/o coating: was quite sticking, but it works.
(I also used glass once, without coating, but that is a bad idea!)
* PS w Teflon: is less transparent option (see middle part of vat in picture). I also accidentally partly demolished it by a knife, while getting of a wrong build.
* PS w PDMS: seems to be most easy stuff to print on. Although I later also demolished this one with a knife.... :)

Now I changed to:
* Glass w PDMS: I guess this is a little better then PS. (PS could also scratch very easily..)

Why do you think, FEP adhesive backed tape is the best?

I also did have a look to your CreationWorkshop software, it really looks amazing!!
I'll try this as soon as possible. Many thanks for sharing!
Last edited by EdgE on Mon Jan 27, 2014 5:17 pm, edited 1 time in total.

hp_
Posts: 300
Joined: Tue Dec 24, 2013 10:25 am

Re: An other DIY SLA DLP printer

Postby hp_ » Mon Jan 27, 2014 5:15 pm

Hi,

I use FEP film 0.05mm thickness and clamp it against the glass, no forming of bubbles under the glass :)

works really well for me. and i don't have any problems with damaging the VAT when overcurring..

hp_

watsonstudios
Posts: 52
Joined: Mon Jan 13, 2014 7:34 pm

Re: An other DIY SLA DLP printer

Postby watsonstudios » Tue Jan 28, 2014 12:39 am

I've ordered this stuff before and it worked pretty well. I did ruin it when part of a print detached and kept exposing the resin in one spot stuck to the film so I had to scrap the film. I may try it again. I did make a vat that is 3 pieces so you can clamp any type of film above the polycarbonate bottom.

This is what I ordered:
http://www.mcmaster.com/#fep-film/=qfwkkk

It's a bit expensive at the .005" size. I did not try the adhesive backed yet.

Is this the same stuff you're using or did you find it somewhere else?

hp_
Posts: 300
Joined: Tue Dec 24, 2013 10:25 am

Re: An other DIY SLA DLP printer

Postby hp_ » Tue Jan 28, 2014 2:35 am

Hi,

I bought a piece here:

http://catalog.cshyde.com/item/-categories-ptfe-teflon-products-ptfe-teflon-films/fep-pfa-clear-ptfe-film/fep-film-23-2fep-24?&plpver=1002&origin=keyword&by=prod&filter=0

but for europe i have now also found a german supplier haveing more reasonable price and shipping.
http://www.kastilo.de

i've also found a supplier in china willing to send me some stuff but i have still test it..


cheers,
hp

watsonstudios
Posts: 52
Joined: Mon Jan 13, 2014 7:34 pm

Re: An other DIY SLA DLP printer

Postby watsonstudios » Tue Jan 28, 2014 3:12 am

Wow, it's a bit more expensive at Cshyde. $18.00 per foot of .002"

McMaster has the same .002" sheet at only $7.66 per foot.

Both are 24" wide.

EdgE
Posts: 32
Joined: Sun Jan 26, 2014 1:28 pm
Location: Utrecht - NL
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Re: An other DIY SLA DLP printer

Postby EdgE » Wed Jan 29, 2014 5:06 am

I bought some stuff here: http://www.muve3d.net
FEP/Teflon Non-Stick Reservoir Coating
Sheet: 8.5″ x 6.75″ - $3.50
(I ordered 5 sheets and had to pay $24 in total, incl. shipping costs...)

EdgE
Posts: 32
Joined: Sun Jan 26, 2014 1:28 pm
Location: Utrecht - NL
Contact:

Re: An other DIY SLA DLP printer

Postby EdgE » Thu Mar 20, 2014 4:14 pm

Hi,
like we are all looking for the best vat materials to work with, I try to make a list here:
http://www.khwelling.nl/3d.dlp_printer.testing.php#vat_floor

Please help making a longer list of: options & suppliers!
Send a mail or reply onto this forum.

Tnxs!

hp_
Posts: 300
Joined: Tue Dec 24, 2013 10:25 am

Re: An other DIY SLA DLP printer

Postby hp_ » Fri Mar 21, 2014 1:09 pm

Hi Edge,

did you try out PMP yet?

http://www.mitsuichemicals.com/opulent_cha.htm


cheers,
Hp


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