Miga motors nanomuscle : servo substitute?

I was looking for a parachute ejection system for one of my small UAV and I found the miga motors nanomuscle. Cheap  SMA system linear actuator (less than 10$ unit), I was thinking about using some instead of the servos on UAV.

 

http://store.migamotors.com/index.php?main_page=product_info&cP...

 

available at Sparkfun http://www.sparkfun.com/products/8782

 

 

Views: 2073

Comment by I.S. on October 31, 2011 at 2:14pm

I see high current consumption in specs and low torqe.
Sorry my ignorance, but in what aspect is this supposed to be better than a servo?

Comment by Fabien Bruning on October 31, 2011 at 2:18pm

I wonder how accurate it is, or is it an on-off actuator? It's rather slow though, 4mm takes almost a second.


Moderator
Comment by Sgt Ric on October 31, 2011 at 3:22pm

Snails move faster!   

Really!

 

Comment by Ken on October 31, 2011 at 5:35pm

Dittos. Memory wire/muscle wire is really slow and high current. Also, they have an on-off characteristic. Linear operation is not recommended. OK to open a hatch, not so good to adjust aileron/elevator.

Fun stuff to play with, though.

 

 

Comment by Bertrand Duchiron on October 31, 2011 at 7:55pm

Maybe the dynalloy flexinol will be better for this, I don't know,  will try. For ejecting a parachute other linear actuator I saw are to heavy.

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