Mini linear actuators

[Simas_42]

Hello,

I need help selecting a linear actuator.
I have a cnc where I have to move z axis very fast for a 1mm travel (something like sewing machine, but I need to control 20 needles independently)

Right now I made z operated by the stepper motor (translated to linear motion) and I get 1-2ms for 1mm travel start to stop. The problem is with it's size I need something I could fit in 20mm x 20mm size square footprint(height is unlimited). Also it should last at least for 1-2M cycles.

I was thinking about:
* electromagnets
* linear solenoid
* voice coil motor
* mini pneumatic cylinder (i think this doesn't fit because valve itself needs 2-5ms to operate)

Never had anything to do with such a small parts and actuators so I need your insight. Also if you know better forum part where I can find this answer let me know.

 

[GregLocock]

So what is the actual spec? 1 mm in 2 ms for 2 million cycles at what force?

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[Simas_42]

Yeah I forgot the force, it should be about 3N.