400 Hz Servomotor

Thanks John, I wrote few months ago and but I haven't repy...

Look up 'synchro' and 'resolver' in you rfavourite search engine, I suppose...

Thomas

La scrittura indecifrabile di "Zak" interruppe la mia meditazione, imbrattandomi lo schermo con :

Many thanks Thomas, unfortunately I have read all readable :-(((( Bye

Do you think they belong in that class of equipment? Do you want an explanation about them or do you think they are different?

Thomas

La scrittura indecifrabile di "Zak" interruppe la mia meditazione, imbrattandomi lo schermo con :

Hi Thomas,

I have a lot of this servomotor and I'm looking for application notes or schematic. This servomotor are very rare for the motor and the tachometer enclosed together. This motors are old parts, used in 60-70's analog calculators; I hope that some "old crown" hold (as I) oldest catalogues or data sheet. Bye and thanks

Is that motor out of a Muirhead fax machine (circa 1980)?

Ken

You have voltages; did you try to power the motor?

It would not surprise me if the motor behaves as an AC powered stepper motor with extremely high step accuracy.

There is a field coil that has the same function as the permanent magnet in a stepper.

And there are two drive coils; the phase and voltage these are driven with determine rotor position.

However this is mostly for statical applications (indicators) so the tachometer baffles me.

Thomas