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Mini linear actuators

Mini linear actuators

Mini linear actuators


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.

RE: Mini linear actuators

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

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