Complete Guide to 70mm Film

[koraks]

I’m not sure how to send the STL files here, I’ll see if I can figure out a way to upload them somwhere public, but in the meantime, I can probably send a dropbox link or something.

Yeah, good point; we need something for this. @Sean, please take note of this; we may want to add some kind of option for photo-related file sharing that's not image files.

 

[blee1996]

@MCB18 thanks for offering to share the design of the 65/70mm reels for 2500 tanks. A couple of questions:

1) Which filament material did you use for the print? Are there any lock between the top and bottom parts?
2) How easy and difficult to thread the negative from center, compared to stainless steel reels?

 

[MCB18]

@MCB18 thanks for offering to share the design of the 65/70mm reels for 2500 tanks. A couple of questions:

1) Which filament material did you use for the print? Are there any lock between the top and bottom parts?
2) How easy and difficult to thread the negative from center, compared to stainless steel reels?

So, just to be clear, I have not actually printed this model yet, but it is very similar to the spiral I have printed for 70 mm (which should be somewhere further back on the thread, but I’ll see if I can find the pictures).

The difference is are that the central hole is a little bit bigger, and the pitch of the spiral is a bit shorter just so that it can fit in the 2500 tank.

As far as your questions:

I had that spool printed at my school, at the time ABS was loaded in the printer, so that’s what they used, although I’m fairly certain that you can use other less annoying to print filaments if you wish. The top and bottom are keyed, so they will fit together correctly, but you do need to glue them.

Loading the film was a bit tricky with the spool I did print, but that’s because I didn’t make the grooves the film went in deep enough. I have since made them deeper, and although I haven’t had a chance to get the revised version printed myself, I do know someone else that has printed it and it worked well for them.

If you can load a stainless steel reel, you can probably load this reel just fine. And if you have ever loaded one of those Ilford 72 exposure plastic reels, this will be a piece of cake.