DIY post-print "Vibra" cleaner

sabotagesabotage Member, Moderator, Backers, Ultimate Backer
Here's an ingenious, if not a little hack-ish, solution to faster post printing IPA cleaning process created and described by a Form 1+ user on their forums.  He calls it the "Loafinator".  I found this originally as a tweet from @3DPrinterBlogs.

It's basically a palm sander with a metal bead loaf pan attached to it.

I'm not trying to promote FormLabs, but hey, they have an SLA community of users already coming up with ideas to some things we'll also find helpful, so I sometimes trawl their forums too.  This one falls square in the space where it could be useful for any SLA user.  We'll just need to know final max build volume dimensions so we can start finding appropriately sized baking pans at the local thrift shops ;)

Shane...
imageBacker(Ultimate Package - delivered on July 1, 2015)

Comments

  • David_BarryDavid_Barry Member, Moderator, Backers, Ultimate Backer
    Yea quite a Redneck setup there. Back in January I was discussing using that Ultrasonic UV cleaner with the 3DFacure team.

    They loved the idea.

    The SLA Resin cures much faster in absence of oxygen. Curing under water is much faster ten curing in open air.

    So placing the printed items in an UV Ultrasonic cleaner would clean the the extra resin quite efficnetly while quring the remain resin using fastest method.
    Hudson Valley, NY Draken Ultimate Package Arrived 7-6-2015
  • sabotagesabotage Member, Moderator, Backers, Ultimate Backer
    OK, maybe I'm confusing two things here, but this was specific to the "rinse" step, where the uncured resin "drips" are cleaned/removed via a bath in IPA (Iso Propyl Alcohol).  Once that's done... THEN we move on to the UV curing step, where your idea of using the Jewelry cleaners (Ultrasonic UV cleaner) would come in... right?

    I'm willing to admit that I'm confused (it wouldn't be the first time :\"> ).  If so, please help set me straight, seriously...
    Shane...
    imageBacker(Ultimate Package - delivered on July 1, 2015)
  • David_BarryDavid_Barry Member, Moderator, Backers, Ultimate Backer

    Normal Finishing
    process:


    Allow the build platform to return to top of printer.

    Allow a short amount of time has pass to allow excess resin to drip off the
    printed item.

    Remove the build platform with the printed item still attached.

    Careful remove the printed item from the build platform by using the spatula to
    lift the print raft under the printed item off the build platform. (Take care
    not to damage print or cut yourself removing print.)



    Place printed item, print raft and print supports into 90% IPA and thoroughly
    rinse. Remove from the IPA and then thoroughly rinse in Water.



    Remove the Supports from the printed item using the cutters.



    Cure the printed item under the curing lamp turning over once in a while to
    allow every surface to be reached by UV light.



    Enhanced Finishing process:

    After removing the supports with cutters.

    Fill UV ultrasonic cleaner with just water

    Place the printed item in the UV ultrasonic cleaner and turn on ultrasonic
    portion.

    Wait a few minutes

    Turn the UV lamp on the UV ultrasonic cleaner.

    Wait for printed item to finish curing. (The time it will take to cure is going
    to to need investigation. Some Resin manufacturers say that under water resin
    can fully cure in less than 15 min. We will need to test this timing.)



    Using the UV ultrasonic cleaner gets all the uncured resin and IPA out of all
    the crevices of the printed item.

    This will result in a better print over time. The print will not be tacky to
    the touch and damage to print from IPA that soaked into resin will be greatly
    reduced.



    FYI: if you plan on placing printed item near sunlight painting is greatly
    recommended. The item will continue to cure if exposed to UV light and the
    light from sun will discolor prints.



    Hudson Valley, NY Draken Ultimate Package Arrived 7-6-2015
  • sabotagesabotage Member, Moderator, Backers, Ultimate Backer
    Thanks for the detailed post print process description.

    Regarding the UV ultrasonic cleaner, have you done any looking to find one with a capacity that will meet or exceed the anticipated print volume for the Draken?
    Shane...
    imageBacker(Ultimate Package - delivered on July 1, 2015)
  • David_BarryDavid_Barry Member, Moderator, Backers, Ultimate Backer
    Not Yet. I am probably going to start with a small unit to test the entire idea.
    ultrasonic cleaner
    ultrasonic cleaner
    ultrasonic cleaner
    Hudson Valley, NY Draken Ultimate Package Arrived 7-6-2015
  • sabotagesabotage Member, Moderator, Backers, Ultimate Backer
    edited March 2015
    Here's an ultrasonic cleaner with a capacity close to what we'd want, though not quite up to the Draken's currently advertised print volume (8.66" x 3.86" x 7.09"):

    Chicago (Harbor Freight) 2.5L Ultrasonic Cleaner.  Tank dimensions are 9.75"(+12%) x 3.00"(-22%) x 5.50"(-22%).  USD cost is ~$85, plus shipping if you don't have a Harbor Freight near you.

    Missing is any UV capability, but I bet we could come up with a way to build/print our own hood adaptor for it from one of the UV Curing lamps that 3DFacture is offering, or building our own.

    I did find an Instructable that described how to make your own ultrasonic cleaning vats using 40KHz transducers and an ultrasonic generator.  It's a bit old (2yrs), weak on "instructions" and more expensive (~$300 USD for transducers and driver, plus shipping), but would allow you to make a cleaner to any size vat you need/prefer.

    More digging may provide more ideas... keep 'em coming ;)
    Shane...
    imageBacker(Ultimate Package - delivered on July 1, 2015)
  • Andrew_3DfactureAndrew_3Dfacture Member, Moderator, Backers
    edited March 2015
    Nice discussions here, Shane and Dave.
    We didn't forget Dave's great
    idea and do purchased a ultrasonic bath for a test.  UV post curing with
    print immersed under IPA does give pretty good cleaning result in a few
    seconds!
    How do you guys post images here?  I copy and paste an image of the ultrasonic bath but it doesn't show up.

  • David_BarryDavid_Barry Member, Moderator, Backers, Ultimate Backer
    when I want ti add pictures I copy all my text to notepad and then create just the image link then save. And click edit. Then you can move picture around add more pictures and put text where you want.
    Hudson Valley, NY Draken Ultimate Package Arrived 7-6-2015
  • sabotagesabotage Member, Moderator, Backers, Ultimate Backer

    How do you guys post images here?  I copy and paste an image of the ultrasonic bath but it doesn't show up.

    From what I can tell, when you "paste" the image, what you pasted was an inline base64 encoded image via "data:" URL scheme (see RFC 2397).  Probably done by "copying" from some app or file browser and "pasting" it directly.


    As far as I know, you've not enabled file upload permissions to members/backers, so the only way I've been able to "attach" an image is actually just adding it as an "<img>" HTML element (using either hand written HTML, or the "image" icon in the comment editor toolbar).  In either case you need to provide a URL to the image already accessible online (hosted and publicly shared via something like G+, Facebook, dropbox, etc...).

    Hope that helps @Andrew_3Dfacture
    Shane...
    imageBacker(Ultimate Package - delivered on July 1, 2015)
  • sabotagesabotage Member, Moderator, Backers, Ultimate Backer
    edited March 2015
    I just noticed (quite by accident) that if I clicked on the "Quote" link at the bottom of your last post, the image actually will show up... So I am testing to see if I actually post a comment quoting your "data:image/jpeg" inline image, does everyone else also see it now too?

    I copy and paste an image of the ultrasonic bath but it doesn't show up.

    (EDIT: I guess not... Once I hit "Save Comment" the image becomes broken again and will not render correctly, even though it did while in the edit mode... weird :/ )
    Shane...
    imageBacker(Ultimate Package - delivered on July 1, 2015)
  • Andrew_3DfactureAndrew_3Dfacture Member, Moderator, Backers

    Interesting....I can see my inserted figure of the bath and UV lamp when I click your Quote~

    The FileUpload is on but I can't find anywhere to upload either.

  • sabotagesabotage Member, Moderator, Backers, Ultimate Backer
    Odd... At any rate, I copied the image and uploaded it to my G+ account... for the benefit of all, I'll link to it here:
    image



    Shane...
    imageBacker(Ultimate Package - delivered on July 1, 2015)
  • TDMeeksTDMeeks Member, Backers
    YouthQuest Foundation recently acquired a ProJet 1200 for our training facility and I picked up a relatively inexpensive ultrasonic cleaner from Harbor Freight to aid in washing parts before curing.

    The parts created in the Projet 1200 are small enough that I am able to use two different baths in the ultrasonic cleaner.

         1)  The cleaner is filled with water
         2)  Two bowls filled with 91% alcohol are placed in the water.
         3)  The part is placed in bowl #1 for the initial rinse
         4)  The part is moved to bowl #2 for the final rinse.

    This has worked well for us.  But, of course, we are limited to printing pretty small parts. 

    It's cool to see creative solutions to dealing with cleaning larger parts as commercial ultrasonic cleaners can get pretty expensive as the volume increases.
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