Jump to content

Recommended Posts

Hi all, this is my first post here.

Over winter break I got bored and decided to try learning some CAD to make a new lomo like spiral tank for 16mm (or in my case double 8), because the results from a Morse G3 just aren't cutting it.

Its by no means refined, but in theory it should hold 100' of 16mm film.  I was going to do a test 3D print at a local makerspace, but then the pandemic moved in and that plan kinda fell apart.  I looked online at a few places that do prototype printing, and the cheapest I found was about $110 including shipping, which is a bit much for me at the moment, but is still cheaper than a lomo on ebay!

The picture is of the bottom piece.  The film would fit into a slit in the center (you can't quite see it in the pic), then you'd put the top on, use a plain old nut and bolt to hold the two together, and then begin spinning the reel assembly clockwise to wind your film on.  I wanted to make it fit inside a 5 gallon bucket, but its a bit too wide, 30 cm in diameter to be exact, so some kind of container would need to be found.

If anyone has access to a 3D printer and wants to give this a go, I'd love to see how it turns out.  I'll put the STL files up in another post because they're too big to attach here.

Let me know what you think!

bottom.JPG

Share this post


Link to post
Share on other sites

Thanks for sharing. What exactly do you want to know? I have a 3D printer the Ender 3 which is a common one and I can tell you that it is too big for my printer, but I could print the center maybe to see how the film runs trough it. Are you supposed to start loading from the center?

Share this post


Link to post
Share on other sites

I just figured I'd put the files out there in case anyone had access to a printer and wanted to give the tank a go before I get a chance to.  The film does load from the center, just like a lomo tank.  I figured if you fold the end of the film over, then put the folded part in the top of this groove, it should thread on fine.

1.JPG

Share this post


Link to post
Share on other sites

It would fit a 20x16 inch print developing tray, but at the expense of quite a bit of extra chemical. They are about 3" deep.

Unless you could 3D-print a daylight tank...........

Share this post


Link to post
Share on other sites

For a smaller tank that is a touch wider than a 5G bucket head over to a car parts store and find one of the round oil drain containers. Mine has a spin-on lid and a hole in the center of what is a weak funnel. This option also has a drain off to the side.

Phil Forrest

Share this post


Link to post
Share on other sites

Hello Neighbor!

I am in Minneapolis and have been working on similar processing designs for S8. This is great! I work at a prominent arts/design college and we have access to some STL printers as I assume FDM might be a little to rough for film but could work. I am unsure of the bed dimension of these and will check. I would love to help out with this since I am closer then some of the folks on here so shipping would be cheap!

Share this post


Link to post
Share on other sites

Just wanted to chime in and say: excellent work Sam. This is something that could be quite a game changer for those among us who process at home and/or are part of small, independent film labs. Lomo tanks are great, but very fragile and expensive because the are scarce. The bakelite tanks break easily and the spirals can't withstand heat very well (if you use homebrew drying constructions). 

If the design could be extended to tanks and different sizes, I would not only print them, I would purchase them. And I don't think it's hard to offer reasonable prices compared to 100ft Lomo tanks. 

Share this post


Link to post
Share on other sites

very interested in the......development.....of this.......I'm converting a garden shed into a darkroom so Im looking to process up Tri-X super 8mm myself as an example

Share this post


Link to post
Share on other sites

Excellent work - there is definitely a market for 3d - printed replacement reels compatible with Lomo tanks. STL files for the other LOMO parts are available already but these are the first STLs for reels I've yet seen.

A printer with a large bed size will be required to print these models in one piece. I have a regular size 3D printer which is too small fiorthis job, but for example the Creality CR10S5 could do it. The other option is usually to split large models into parts and print then reassemble, but I doubt this would suit the spiral. Currently I don't have the bigger Creality machine .... yet anyway.

As for the print quality then I think 0.1mm would probably be a fine enough resolution to avoid scratching the film, but I'd need to test that.

best

Phil

 

Share this post


Link to post
Share on other sites

Hi all, its been awhile!

This summer I got talking with a coworker and friend of mine about film, and the spiral designs I had made.  He had a bit more modeling experience than me, and surprised me a couple months ago with a revised version!  This is more like the real lomo tank where it can take 8mm or 16mm (its also only about 50 feet long).  I did this test print through cloudcraft and the whole thing cost about $40.  Super 8 had a problem where it would jump off the track and start to pile up after about 15-20 feet, though with standard 8mm I was able to get the whole roll on.  Also when loading standard 8 (16mm) I had to flip the top over so it wouldn't slot into the spacer, it was just a hair too short otherwise.  If anyone has any suggestions just from looking at it, or from your experience with lomo tanks, we'd both love to hear it!

 

20200918_234717-min.jpg

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Glidecam



    Paralinx LLC



    CineLab



    Rig Wheels Passport



    Tai Audio



    Gamma Ray Digital Inc



    Just Cinema Gear



    Media Blackout - Custom Cables and AKS



    New Pro Video - New and Used Equipment



    Broadcast Solutions Inc



    The Original Slider



    Abel Cine



    Serious Gear



    Visual Products



    Wooden Camera



    Ritter Battery



    Metropolis Post



    FJS International



    G-Force Grips


    Cinematography Books and Gear
×
×
  • Create New...