Thanks! IF we could get the voice coil thing to work, it would make the
product REAL SIMPLE (only one moving part). Alternatives we're considering
involve a lead screw driven by a stepper or permanent magnet DC motor. We
need to do about one cycle per second.

Harold


> Hi Harold,
>
> I've used DC motors for this, swinging < 90 degrees, but none in that
> power range.
>
> Cheers,
>
> Bob
>
>
>> Anyone have experience with voicecoil actuators? I have an application
>> where one might be useful. We're looking at a maximum displacement of
>> about 50mm and a force of 22 Newtons (about 5 pounds). Using a normal
>> solenoid (non-magnetized slug), it appears we need about 4,700
>> ampere-turns to do this (100mm coil length, 30mm coil diameter). It
>> SEEMS
>> that it would be better to use a permanent magnet instead of a
>> non-magnetized slug. I'd expect the force to be proportional to the
>> product of the two fields. But, anyone here have experience with these
>> types of actuators? Any comments?
>
>
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