[simpits-tech] Controlling synchros

[Gene Buckle]

Simon Bennett wrote:
> Since I've got a remote attitude indicator coming in the mail any day 
> now (my first real aircraft instrument), I've been thinking a lot about 
> how to drive it. Almost everyone seems to think driving synchros is an 
> almost impossible task, but I'm not so sure. Trying to generate the 
> signals to control them would definitely be a hell of a challenge, but 
> I'm wondering, wouldn't it be possible, and much less frustrating, to 
> wire the indicator synchro a torque transmitter, the rotor of which is 
> controlled mechanically by a stepping motor or the like? I'd rather not 
> gut the indicator if I can find any way to use it in its original state.

The cheapest method I've seen to drive these things is by coupling a 
stepper motor to the shaft of a synchro transmitter.  You then wire up 
the transmitter to the resolver in the instrument and you've got a 
bargain basement "digital" to synchro converter.

g.


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