Wrist blade mechanism using an old CD-ROM mechanism


Elkman

Sr Member
Thanks for all the comments. As far as the power supply goes, the motor is a 12 volt motor, like other computer components that require a 12 volt supply. I'm using a rechargeable battery that I got from Batteries Plus. I'll probably connect into that for any other electronic work that I do with the costume, like the left gauntlet or the active camouflage netting.
 

Ei luj

New Member
Elkman,

I love it, good job

I had been pondering how to do this beyond a spring and fishingline method, and your thread provides the elegant solution :D

I tossed my workroom for old CDROMs and pulled a couple dead ones apart... there are differences between 'em, that's for sure!

I put the motors on my bench supply and found they will run on 5v and take less than .1A

Now in addition to the main motor and tracks I've got a bunch of goodies, tiny limit switches, little 4 pin connectors, audio jacks, gears of all kinds; wahooo, this thread is an inspiration, many thanks!
---
Ei'luj
 

Elkman

Sr Member
[quote name='ei'luj' post='198658' date='Apr 8 2010, 12:51 PM']Elkman,

I love it, good job

I had been pondering how to do this beyond a spring and fishingline method, and your thread provides the elegant solution :D

I tossed my workroom for old CDROMs and pulled a couple dead ones apart... there are differences between 'em, that's for sure!

I put the motors on my bench supply and found they will run on 5v and take less than .1A ;)

Now in addition to the main motor and tracks I've got a bunch of goodies, tiny limit switches, little 4 pin connectors, audio jacks, gears of all kinds; wahooo, this thread is an inspiration, many thanks!
---
Ei'luj[/quote]

I couldn't get my motors to run at 5 volts -- I had to run them at 12 volts. I'm not sure why I can't get them to run at 5 volts, unless my power supply is wonky.

I'm glad I gave you the inspiration. Part of the fun of building costumes like this is coming up with new and interesting engineering solutions. (And, of course, it's always a lot of fun to take old electronics apart. )
 

Ei luj

New Member
I couldn't get my motors to run at 5 volts -- I had to run them at 12 volts. I'm not sure why I can't get them to run at 5 volts, unless my power supply is wonky.

I'm glad I gave you the inspiration. Part of the fun of building costumes like this is coming up with new and interesting engineering solutions. (And, of course, it's always a lot of fun to take old electronics apart. )

How old were those CDROMs; I wonder if older ones run the motors on 12v and the newer ones run on 5v...
or if the issue they had was the motor itself?

now you got me to thinking

(goes back to tinkering, see what you started? j/k )

---
Ei'luj
 

Roydraven

New Member
wow that is so awesome thanks for sharing mate o_O I love to see people on here use regular inventions to improve suits and this is da best for a blade mechanism XD
 

Elkman

Sr Member
I just realized I never answered the question about why the motors wouldn't run at 5 volts. It turns out that my power supply was on the fritz, and instead of delivering 5 volts, it wasn't delivering anything at all on that output. It is delivering 12 volts, though.

I did some more experimentation and found that they'll work on a 9 volt battery. I'm using a 9 volt lithium battery, instead of a standard alkaline battery, in hopes it'll put out more juice. I also experimented with one of those 12 volt A23 size batteries, like the ones that are used in car alarm key fobs, but that didn't put out enough current.

By the way, my friend Paul gave me several more dead CD and DVD drives, so I could potentially build more of these for other hunters if my time permits.
 

Ei luj

New Member
I just realized I never answered the question about why the motors wouldn't run at 5 volts. It turns out that my power supply was on the fritz, and instead of delivering 5 volts, it wasn't delivering anything at all on that output. It is delivering 12 volts, though.

I did some more experimentation and found that they'll work on a 9 volt battery. I'm using a 9 volt lithium battery, instead of a standard alkaline battery, in hopes it'll put out more juice. I also experimented with one of those 12 volt A23 size batteries, like the ones that are used in car alarm key fobs, but that didn't put out enough current.

By the way, my friend Paul gave me several more dead CD and DVD drives, so I could potentially build more of these for other hunters if my time permits.

Elkman,

Thanks for the update

9v battery is the simple solution.

Using 5v means adding more parts, and more batteries since they'd be 1.5v....

Yes, the lithium battery will last longer than the alkaline 9v and the A23 12v one.



Here's a nice Wikipedia on batteries, theres tables of the various sizes, voltages, and currents:

http://en.wikipedia.org/wiki/Nine-volt_battery
http://en.wikipedia.org/wiki/Battery_%28electricity%29

---
Ei'luj
 

newpred

New Member
oh man i just remembered. Iwork in the carpenters shop at caesars palace and we have literally tons of scrap plexi glass long enough to make hundreds of blades and a band saw and sander and a buffer. *evil grin*
 

Elkman

Sr Member
Wow, that looks amazing. That's nice work, how did you construct the gauntlet? It has a lot of detail and looks incredible.
I sculpted the gauntlet and the top housing out of oil-based clay, then made molds of them with Smooth-On's Oomoo 30 silicone. Then, I did the casting with Smooth-On's Smooth-Cast 300. I've used that combination for other projects, and it's worked well.

I probably could have saved some silicone by using their brush-on product, Rebound 25, for the wrist gauntlet (the curved part that goes around my forearm). The Oomoo 30 is a pourable silicone that goes into a mold box, whereas the Rebound 25 is brushed on in several layers and then reinforced with a hard plastic mother mold. But I'm digressing here.
 

behindthecamera

New Member
hey can you put a video on to show its realism in more detail please





[/size]If you so much as strike me down I will become more powerful than you can possibly imagine
 
Last edited by a moderator:

Your message may be considered spam for the following reasons:

  1. Your new thread title is very short, and likely is unhelpful.
  2. Your reply is very short and likely does not add anything to the thread.
  3. Your reply is very long and likely does not add anything to the thread.
  4. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
  5. Your message is mostly quotes or spoilers.
  6. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread.
  7. This thread is locked.
Top