Pocket Coin-Op Bottle Opener
Description
I was ashamed Thingiverse. So ashamed. I presented the Mighty Bottle Opener as the pocket equivalent to Starno's Coin-Op. It wasn't. It isn't. I just wasn't able to find a reliable way to protect the plastic.
It works really well if printed in PLA, but for the vast majority of users it's an annoying chewed-up mess.
WELL NO MORE! After months of self recrimination, I went back to the drawing board, and have come back with a beefier "church key" design.
Two things that make me confident in this design:
1 - I've used it to open several bottles with ease. (Gasp!)
2 - I took the time to make the model fully parametric. If it's not strong enough for you, you can make it 10 inches thick! (not recommended)
Another benefit to the parametric model is that it can be adjusted to fit the coin of your choice. (See the attached image for some of what can be specified. When I say "fully parametric" I mean FULLY)
Mighty Opener: thingiverse.com/thing:9350
Starno's Coin-Op: thingiverse.com/thing:1842
UPDATE: I've added the ability to sexify the opener with a makerbot M. Just set the "UseBadge" flag in the scad. if you'd like to use an M in your own OpenSCAD part, I've broken out the module I used to draw my M into its own thing: thingiverse.com/thing:11105
UPDATE #2: These things make great gifts. With a little tweaking you can print a custom design instead of the M. I've detailed the process here: brettbeauregard.com/blog/2011/09/making-a-custom-bottle-opener/
Instructions
1- Rotate the part such that the first layer above the opening runs across from plastic to plastic
2- If you're getting sagging/drooping, see the discussion below regarding bridge settings
A note about fill: I set the fill ratio on my thingomatic to 0.9, which is essentially 100%. Because of the relative thinness of the part, this isn't the time to skimp on plastic.
Coin Insertion: It had not occurred to me that people might try to insert the coin by pausing mid-print. Apparently this works, but it's not what I do. After printing I slide the penny into the slot as far as I can. then using a pair of pliers (one jaw on the penny, the other on the short edge of the opener,) I squeeze the penny in the rest of the way.
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Scratched my head for awhile since none of the designs or the copies/variations discussed what to do with the penny. Seems to me that's a fairly integral part of this design: when to insert it. After reading everyone's bridging issues I'm thinking it's simply slid in as the last step but luckily I wasn't smart enough to think that far in advance so I simply paused the print at the halfway point (which I only knew when it started the 1st layer across the "bridge" part), inserted the penny into the soft ABS, then let it go on about its business. Here's how mine turned out.
Awesome thing. Forced me to confront my bridging issues and conquer them! Thanks for the cool tool!
I made a bunch and the first 2 I have tried just broke. The plastic around the penny de-laminated and broke apart.
Printed on a ToM at 0.75 infill.
:'(
I found the answer to my own question. Most of the settings you need to tweak can be found on the bridge calibration page: http://www.thingiverse.com/thi...
Honing my settings now :)
I'll re-post when I get it nailed down.
I'm at a complete loss as to how you printed over that gap. What does the "opener's short axis" mean? Did you use support material? See the picture...
Bummed,
Jinx
aw, that's no fun. the TOM I'm using has no problem printing over long gaps so long as it's in a straight line and there's support at both ends of the run. in your picture that would be along the left-right axis.
it looks like that's what you were doing though, so there's got to be something different in our settings. I'm not all that good at that stuff. I'm using a Hackerspace TOM, and for calibration I rely on people who know what they're doing.
does anyone else have an idea as to what would cause thi
s? speed? temperature? cosmic rays?
Your consideration for those of us with other currencies is greatly appreciated! Aussie, Aussie, Aussie! Oi, Oi, Oi! :-D
License
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Printed well. I have just opened two bottles, but to be a proper test I must open many many more. Naturally, I wouldn't leave all those open bottles around. I must empty them first before recycling them. O:-)
Excellent! can I ask why you printed this version instead of the tapered one? (http://www.thingiverse.com/thi...
it's great that people love this one too, but I feel that the tapered one is better. I think I'm missing something.