Printed DNA30 Bottom Feeder

Discussion in 'Modding Forum' started by gdeal, May 5, 2014.

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  1. gdeal

    gdeal Moved On Verified Member ECF Veteran

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    A while back bapgood got me started on CADing mod designs, so I started playing with a concept for a 3D printed bottom feeder. He was nice enough to lend me some of the elements he used for his SXS to get me going. (So a big Hat Tip to baps). The objective here was to get a squonker design in the smallest amount of space possible. While squeezing in a DNA chip between the juice and battery compartments was a challenge, the toughest part of the design was to get all the wiring connections aligned and into a top cap that was removable for battery changes and juice refills. The mod holds an 18650 and 6ml juice bottle and a number of parts came from MiikePetro and Tibs' co-op but are readily sourced on line. (Faddydaddy 510, copper disc, screws, spring, etc.) The mod has seven printed parts: the body, the base cap, the top cap, the button, an internal removable spacer for the battery compartment and a small positioning piece and a firing pin for the mini tact switch. The juice bottle compartment is fully sealed off in the body from the DNA chip and the battery.


    Dimensions are 3.5” x 1.9” X .87”. Here is a comparison to Tibs for size.
    [​IMG]

    Rough layout for parts and wiring.
    [​IMG]

    Painted and partial assembly.
    [​IMG]

    Magnets, spring pin connectors and terminal turrets installed.
    [​IMG]

    It works!
    [​IMG]

    Final assembly.
    [​IMG]

    One thing I noticed is that the shapeway material while durable and strong, can deform. The top cap started out flush to the body, but after a lot of handling and probably from the counter pressure from the battery spring, the material bowed out about half millimeter. I swapped out the spring with a much softer one and the top relaxed a bit. I think the big win here was that the spring pin connectors and terminal turrets held power all the way up to 30 watts. I wasn’t certain, even though the spring pins are rated to 20 amps, that at the actual connection point to the turrets they wouldn’t get hot enough to melt the plastic. So far so good.

    This is a first prototype. The build works, its noticeably light and holds well in the hand, but like anything else, going through the actual build from a design on ”paper”, a lot of improvements/changes become more obvious. So… this is prototype #1. Prototype #2 (major redesign) is on order and prototype #3 is being finalized.
     
  2. kiwivap

    kiwivap Vaping Master Verified Member ECF Veteran

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    That's awesome - even though there are some improvements to make. I hadn't even thought about 3D printing for mods. I am into liquid feed myself - just love it.
     
  3. jlbchelsea

    jlbchelsea Full Member

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    How much did it cost to build, I know the electronics are the biggest cost. It looks great. Will heat deform the plastic in time?
     
  4. asdaq

    asdaq Vaping Master Verified Member ECF Veteran

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    Gdeal, that is just great, you had me at turrets. I marvel the mechanical fire switch with the DNA (at least I think it is) and certainly recognize Bap's bottom panel.

    One thing I disregard by reflex is having attracting magnets mixed with an opposing battery spring and here you have three spring loaded turrets and a battery spring that can handle the 30A, so it must be fairly beefy still, even after changing it out. Are the magnets that much stronger to counteract the springs, or are the springs that much softer than I envision?

    This just rocks, and if you need a beta tester for either prototype #1 or #2, my calendar is open. :)
     
  5. bapgood

    bapgood Vaping Master Verified Member ECF Veteran

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    Very very nice!!!
     
  6. gdeal

    gdeal Moved On Verified Member ECF Veteran

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    Thanks!

    Most of the hardware was sitting around, so I havent price out the actual cost of components yet. The cost of the 3d print parts was ~$50-$60 but it really depends upon type and amount of material used. Here, I used the least expensive material type "white, strong, flexible" and tried to minimized material volume to the max for the prototype. I like the Alumide material much better (smoother and doesnt need painting...but more $) Then maybe another $25 to $30 in parts (?) So. I would guess under $150 including the DNA Chip. The material can handle some heat, but heat wasnt the issue here, the connections didnt overload, the issue was that #$% first spring I used.

    Sharp eye! yup, that's bapgoods bottom panel. (why reinvent what works...;), plus bap's CAD skills are top-notch). I had the same concern with all those opposing forces, so I used four 2lb cylinder magnets to keep it together. It holds very well, but is not difficult to remove the top. The issue with the gap occurred with the heavier (and unnecessary stronger spring under the battery) and because that upward force is toward to end of top cap away from the magnets in the center. After the change to the lighter spring, it wasnt pushing it up, but the top cap was already deformed. :(

    Its not a mechanical fire switch and the spring isnt part of the circuit. Its just there to keep the firing pin raise off of a tact switch in base. (another idea borrowed from Bap). There is a cool uber small tact switch (bapgood again...) sitting on top on the DNA screen and just below the battery. The battery sits on the firing pin aligned with tact switch button. The copper disk in the firing pin provides chip power. The throw is beautiful. Its adjustable from the thumb screw in the button, I have it set so the firing pin rests right on the tact switch. Its click-on- click off in ~1mm.

    I have prototype #2 coming in a couple of days, its got major improvements in the design....if it seems like it will work I'll post up a parts list and link for printing it.

    lol...it should be nice Professor Bapgood. I had a good teacher.
     
  7. T1lVl

    T1lVl Super Member Verified Member ECF Veteran

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    Yea, great job. I defiantly in love with this idea and form factorm

    Sent from my SGH-T999 using Tapatalk
     
  8. asdaq

    asdaq Vaping Master Verified Member ECF Veteran

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    The battery depresses the micro switch? Too cool!
     
  9. RickCain

    RickCain Super Member Verified Member ECF Veteran

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    Very cool build!

    Sent from my HTC One_M8 using Tapatalk
     
  10. gdeal

    gdeal Moved On Verified Member ECF Veteran

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    Yes...here is a snap-shot of the firing mechanism. (I changed it slightly when I built the mod though). Its pictured in the full opened position. The battery sits on top of the copper disc. The spring, (not shown) sits under the copper disc holder. The firing pin which comes from the bottom of the disc holder goes through the center of the spring. The tact switch holder also acts as a base for the spring and secures it in place. So the spring just provides pressure on the battery between the copper disc (positive) and the thumb screw (negative) to keep full time power to the chip.


    Squonk V1 - Firing Mechanism.jpg
     
  11. want to quit

    want to quit Ultra Member Verified Member ECF Veteran

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    So you post stuff like this but dont sell me one? thats pretty messed up sir.

    Bada** looking mod love it want one
     
  12. brawndo

    brawndo Full Member

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    been looking at the pdibb mods and came across this. Are these going to be for sale?
     
  13. Cloud Junky

    Cloud Junky King of the Clouds Verified Member ECF Veteran

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    Its Alive......
     
  14. gdeal

    gdeal Moved On Verified Member ECF Veteran

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    I am really just doing this as a hobby. I have no plans for becoming a vendor. But I am glad to share with anybody who is interested.

    I not sure at this point if making prototype #1 available for other people to 3D print or test out makes sense. But if you like pdib style mods, you are going to really like prototype #2. The overall design is much improved but the structure of the internal parts and features are much more complex. So if the parts print well and assemble with out requiring major tweaking, I'll make it available.

    Alive yes, but work in progress.

    ...here's sneak peak at prototype #2.

    [​IMG]
     
  15. BobC

    BobC Reformed Squonker Verified Member ECF Veteran

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    Looking real good Gdeal
     
  16. Obsiden

    Obsiden Senior Member Verified Member ECF Veteran

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    Nice work! I am sure ita going to come out awesome
     
  17. Rossum

    Rossum Surly Curmudgeon Verified Member ECF Veteran

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    Subscribed.

    I adore my pdib OliveR -- the size, the shape, the fresh-squozen juice, and of course its craftsmanship and natural wood beauty. The only thing I don't like about it is the way the vape changes with the battery's state-of-charge and the fact that its output can't be tweaked to accommodate different coil resistances / geometries. All the other mods that I still use are DNAs, and there's a reason for that. ;)

    For a while, I was actually pondering how to retrofit a DNA into a thicker bottom plate for the OliveR. I sort of put those thoughts aside until I get some loose DNAs physically in my possession, which should be Real Soon Now™.

    Raises hand! Thank you!
     
  18. HwyApostle

    HwyApostle Senior Member Verified Member ECF Veteran

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    Very nice thank you for putting in the head against wall time and sharing with us. I've been thinking about a BF for a bit and love the design you have chosen.


    Sent from the open road using Tapatalk.
     
  19. turbocad6

    turbocad6 Ultra Member Verified Member ECF Veteran

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    that's a really cool layout with the brain between the battery and the bottle, very efficient use of space
     
  20. Obsiden

    Obsiden Senior Member Verified Member ECF Veteran

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    The mod looks great! How hard was the 510 connection to do?
     

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