Let's Make Robots!

NanØMuscle - Rotational Actuator (nano - miga - muscle)

Vendor's Description: 

I have just received one of these actuators, in preparation for a lightweight Robot project.

Also known as Nano muscle or miga motor.

I would like to share the info as it packs quite a punch for such a small package.

Basically you apply approx. 3 to 6 Volts (300mA) onto the input pins and it actuates "memory wire element"

(it contracts like a muscle and in my version translates this to a rotary servo like movement)

It also gives two output signals one when it is at rest and another when it has reached its max end position.

Advanced Miniature Motion RS-70-CE 1131 (NM70R-6P) Rotary Actuator





• Bidirectional 60° rotary
• Built-in overstrain/abuse protection
• End-stop indicator
• Position feedback (foroptional position control)
• Silent operation
• Miniature size
• Integrated direct-drive design
• No gearbox or clutch required


The NanoMuscle is a bidirectional rotary motion actuator that
rotates up to 60° to provide smooth, silent movement in a miniature package.

It is a complete motion solution. Unlike regular motors, the actuator is an integrated design
for direct drive.

There is no gearbox or clutch necessary, which saves cost, reduces space required, and simplifies product design.
With a minimum of external components,the actuator can provide a simple rotate,hold, and return motion.


Position and speed control can be obtained by using the pulse width modulated (PWM) output available
on virtually all inexpensive 4-bit or 8-bit speech ICs, LCD controllers, and other general-purpose microprocessors.

Torque: A unique feature of the NanoMuscle rotary actuator is that it provides constant torque of 12.2 g-cm in both
directions, for a full range of smooth motion.

Speed: A full, clockwise 0° to 60º rotation with 3.0V applied takes a minimum of 300 ms,

while the counter-clockwise (60° to 0º return) requires no power applied and takes a minimum of 600 ms.

Faster rotate speeds are possible with higher voltage applied. Speed control and/or symmetry of motion can be achieved via
software running on an inexpensive microprocessor as mentioned above.


Electrical Specifications
Operating voltage range: 2.5 – 6.4V
Nominal voltage range: 4.5 – 6.0V
Hold current for full-rated torque: 68 mA (@4.5V), 52 mA (@6.0V)

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Thanks - yes they are a bit of a balancing act - i am attempting to make a feedback controller for it to make it more servo like.......

........ then plan is to make it airborn...... for  V.lightweight crazy plane idea......... (will have to remove its plastic casing and cut some more of the metal spindle off though)

Yes the casing on mine did get a little hot a few times - though i did find that PWMing it worked fine and i was able to give it just enough current to "Motor" under some for of control - luckily this version gives logic levels outputs at Zero and Max rotation.

........ if this fails then maybe i take you up on the controller offer... :-)

lightweight! There it is, the advantage of these!!

I burned / fried / snapped several, and never really realized why they would be any better than say a light weight servo.

But if you really are counting grams or whatever you measure (stone?), I guess these will have an advantage!

PM me if you need parts, I have several "controllers" for them.