Air Temp Nitinol

[gadgetmall]

Hi tom . Apparently some one is follow my thread and getting grants for this exploration . Chinese no Doubt . Anyways very good . It is now frost and cold as all heck . I have not had the time to explore the ambient motor i built but will very soon . I do see my wires turn to speggittii and they also like the cold to relax . they instantly get hard in the house . very cool stuff .

Gadget .

[johntee]

Hi Gadgetmall,


I'm a bit late in this thread.


In an earlier thread you quoted "looks like any wire kelloggs is selling needs freeze spray or liquid nitrogen to get soft. his air temp wire is just that . it stays stiff as steel in 33f and above  "


Is their AirTemp wire so useless? Also in your experience what is a realistic temperature for their advertised AirTemp wire to become sloppy soft? 


Likewise does this wire change to its rigid state at their indicated 70 degrees C.


I always thought they were a reputable company.


Who from your experience supplies the best priced wire that is sold in smaller lengths


Thanks for you time,


John

[johntee]

Hi everyone,

Here's a rather nice attached article on Nitinol wire and using it. It also has a nice easy Pulse Width device for more effective "training" of Nitinol plus much more.

It originally came from Talking Electronics web page but I converted it to Adobe Pdf for easy reading. Full content credit goes to the articles originator.

Hope this is of use,

John

[gadgetmall]

Hello johntee . Welcome . If you keep reading you will see my supplier . he sells a 40 foot roll. It is the best and i have tried them all . The Main problem with k's wire it takes too much Energy to make it do what can be done with just the energy that is available from the environment. This is a fact .

Thanks for the PWM link . I have mine wire perfected but a pwm wold make it that much simpler .

Gadget

[johntee]

 Hi gadgetmall,

Thanks for your time in replying to my post. I've read all your posts and found your link to the ebay seller but unfortunately his products show as SOLD. Just my bad luck.

Do you post regularly with links to the good stuff?

For reference, I have tried the Kellogg's nitinol wire product and likewise found it less than good as a SMA material. Its ability to change or react to temperature change is useless.

I can't see how they get away with calling, and selling it as Shape Memory Alloy for the one they sold me as such seems to behave like the SuperElastic type ( I think  that's correct) which is  oven heated to 530c and thereafter remains in that ridged condition. It will not react or reshape thereafter at lower temperatures as demonstrated on the many videos. I used a variable 'Digital Temperature Controlled Heat Gun' for heating the wire so it's pretty accurate in that area.

I see from your posts that you've perfected your 'training' with capacitors / current, brilliant work !! 

I actually supplied the Adobe Acrobat pdf converted article from Talking Electronics for the convenience of our members, that allows them to keep a hard copy on their PC for easy reference, also the PWM seems a pretty cool way of conditioning / training the nitinol wire for those not as proficient as yourself.

Thank you once again gadgetmall, I'll have to wait patiently for your lead to some good characteristic SMA. My brain cells have been working overtime just recently on constructive methods of utilizing it for the benefit of all. I will succeed. That's what our site is all about.

Kindest regards,

John in the UK 


"People laugh at me because I AM different, I laugh at them because they are all the same"