Instructables

Robotic claw business card

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Business cards are for business people. And nothing shows you mean business like a robotic claw.

Here's how I made my latest business card, which doubles as a convenient gripping device for when you don't want to handle other people's dirty, less mechanical business cards.



It's standard business card size (3.5" by 2") and just over one sixteenth of an inch in thickness, making it slightly chunky but still easy to slip into a wallet. Its various components were laser-cut from two different thicknesses of card then glued together.

A good business card should be something that nobody wants to throw away. Hopefully these cards are amusing enough that people will hang onto them for years, occasionally digging them out of their desk drawers so that they can pretend to be killer robots when nobody's looking. Then, once they've subconsciously built a connection between me and killer robots, they'll offer me a job. Seems like a foolproof plan to me.
 
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Step 1: Starting the design

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The trickiest part of this project, as is often the case, was the design stage. I started with an idea in my mind of a business card that involved gears and that could move in an interesting way, but very little beyond that. I knew that it had to meet the following specifications:

  1. Must be able to fit on a 3.5" by 2" business card
  2. Must not be unreasonably thick
  3. Must have room on which to print an email address and a logo
  4. Must have one simple lever or slider by which to control the mechanism

At first, I expected Number 1 on this list to cause the biggest problems, as 7 square inches really didn't sound like much space for a set of working gears. After a bit of playing with the laser cutter and some scrap card, however, I found I was able to cut effective gears which were incredibly small. I'm fairly sure that it would be possible to make this card half its current size without any functional problems. To design the gears, I used a wonderful piece of software made by Matthias Wendel, called Gear Template Generator. I highly recommend this to anyone interested in cutting their own gears, whatever the size and material.

Another factor that helped with this size constraint was the realisation that, while the mechanism had to fit within a business card when inactive, there was nothing stopping it from overreaching the card's boundaries once the mechanism was deployed.

Number 2 on the list then became the most limiting, as I soon realised that all my gears and levers would have to fit onto a single plane to prevent the card becoming a brick. I played around with different types of card and decided that the best way to build this card would be to use three layers: a thin base layer, a thick, rigid inner layer containing the mechanism, and a thin surface layer.

One morning, while I was sketching ideas for this project, someone showed me a video of a 3D printed grabber mechanism and the rest of the idea just fell into place.
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hectdiaf1 year ago
hi ! i really liked your design , i´m love make this kind of things and for that decided built the mine, I built which whit cards of SIM card (I dont know if i said well), is a few most small what the original and i modeled whit the drill an DREMEL, sanding and polishing took me a time until get of all pieces , thanks for share your ideas, i leave the pictures

   
     
     
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This site offers a solution to many of your precision cutting needs for those who cannot afford a laser cutter.

http://www.silhouetteamerica.com/default.aspx

A laser cutter, while enormously useful and cool, is not necessary for this project. I was able to cut the pieces both by hand and by using the machine above.

Matthajek2 years ago
my computer won't download the eps file, so I can't send it to a custom laser cutting company, so could you post the vector drawing file instead, and if so, is it compatable with inkscape?

thanks for your time and project, that wouldn't help a 13 year-old like me, that I respect so much!
I'm also 13 (high five!), but I was wondering what laser company you're sending that to. I had a hard time finding one. I saw one, but it was for bigger things and it charged like $100 an hour. I need to find one for all of these awesome projects that use laser cutters! Thanks, Thomasthetankengine
im not exactly sure of the prices or anything, but there's a website called 100kgarages.com where people with laser cutters and 3d printers and stuff can do other stuff for you. The website has a map with fabricators around the world.
I forget what it was called, but it never asked for any kind of payment, and it never showed up.It was cheap(cost based on size, I think it was between $10 and $20 for this) and did small pieces out of less-than-1/2-inch thick(your choice) sheets of a material(also your choice, and if they didn't have the material you wanted, they would ship it to their facility from another company)
Thanks, sounds awesome. Do you know of a way I could find it? I would love to find a place like that I can get laser jobs done. If not, that's ok. I think there's one in my neighborhood (?)
no, I don't.
I have the files and if you need them email me at: aidan.jarosgrilli@education.nsw.gov.au any way, cool project. :)
PenfoldPlant (author)  Matthajek2 years ago
I've uploaded PDF and SVG versions of the vector files to Step 2. Hopefully they're more useful to you!
thanks so much!
That is VERY cool!!!
I would do this, but my dad sold his awesome laser cutter... It wouldn't do what he needed it to do so he sold it :(
This is so cool! What a great way for your business cards to stand out.
amjad8310012 years ago
please upload DXF file, not able to covert the EPS format to DXF
download the PDF file and search on google for pdf to dxf online, and click on one of the links, upload the file, and download it.
jordan218922 years ago
just one question how much did you spend on this laser cutter? and great instructable by the way.
monney952 years ago
Great instructable what material was this cut out, and what thicknesses were used?

Thank You
beantek2 years ago
I laser cut them in acrylic but the assembly was an epic fail. Luckily I printed 4 sets but you should have set a marker or some sort of point where the little circle pieces go. Thanks for the great design!
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As a test of the laser cutter we just got in to the Milwaukee Makerspace, I decided to cut this business card out of clear acrylic.

I'll be honest, having not successfully cut anything so far, I decided to enlarge it a bit to ensure a quality cut.

So far, so good. Tomorrow, I'm going to affix everything and start tormenting people with games of "I'm crushing you!" (Kids in the Hall ref.)

Thank you, not just for this Instructable, but for coming up with ideas like this in the first place.
popewill2 years ago
Ugh! I'm jealous of you laser cutter. I enjoy making and coming up with ideas like that, but I can't cut neatly to save my life. I'm going to try to make one of those, but it'll be much thicker because I only have access to cardboard. I'll post the picture on here when I'm done.
Mac19972 years ago
hi
Could make me one for me? I would pay you . how much would you want Great idea. I can't make one of these my self cause my computer doesn't download PDF files and I don't have a local laser cutting place.
Greatest regards
Mac1997
This project is amazing.  I give you my vote !  My project entry for the Epilog Challenge uses cardstock too: Quasicrystal Star Lantern.  I hope I can do this with multiple passes on my Craft Robo Pro.

I hope you keep posting fun projects.  Consider phrasing in the tone of telling us how to build things, this reads more like a journal.  It would be nice if the first step contained all required materials and tools (including paper stock thickness).
Rick Wyatt2 years ago
Very Creative! Thanks for a great post.
pie R []ed2 years ago
How long does it take on the laser cutter?
+1 Vote to win

Too bad we can't rate anymore...you'd be getting 5 stars.
andytt112 years ago
what about stainless steel version
PenfoldPlant (author)  andytt112 years ago
That would be great, but quite awkward to make and rather expensive to give away as a business card. Maybe when I'm successful enough, I'll start using stainless steel business cards...
spago2 years ago
two days ago I built the business card made ​​of wood (birch plywood 0.8mm). I used my homemade CNC milling machine:) Very nice project! I love it!
http://www.youtube.com/watch?v=k0QjuULg2xA
PenfoldPlant (author)  spago2 years ago
Fantastic! I can't tell you how I excited I get whenever someone actually makes something I've posted online. This is amazing! Great job, spago.
chicopluma2 years ago
haha take my card or my card will take you
PenfoldPlant (author)  chicopluma2 years ago
Haha, good slogan!
mwagner632 years ago
As my version of Adobe Illustrator won't update would be possible for you to send me the PDF files or better yet post them?
PenfoldPlant (author)  mwagner632 years ago
Sure thing, I've uploaded a PDF version to Step 2.
grey_starr2 years ago
I plan to try the middle layer with paper that already has adhesive on both sides. so it's just peel and stick. Just so I can quickly assembly a few.
PenfoldPlant (author)  grey_starr2 years ago
Very sensible!
techiebot2 years ago
Does anyone have a good (cheap) source for a laser cutting service that could cut some of these from the eps file?

By the way, a great instructable and a fantastically creative project!
PenfoldPlant (author)  techiebot2 years ago
I've not tried having these cut commercially yet, but let me know if you find a good service.
this is huge! great way to wake a smal robotic hand.
PenfoldPlant (author)  didgitalpunk2 years ago
Thanks!
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