B
Bart
- Jan 1, 1970
- 0
I've surfed much and am about "googled" out. I run into older technology
that use resolvers instead of encoders for positioning feedback from DC
motor driven movement. The resolver reads revolutions (or parts of) of the
motor shaft. Is there a way to check to see if the resolver is working with
a DMM? I've read they use AC voltage (some up to 28 vac) and measure a phase
shift, using terminology like "a rotating transformer", and I'm still
confused. I'm up to speed on quadrature encoders (square waves) but would
like to grasp how to check a resolver, even if just to see if its dead.
Normally I place my scope on one of the four wires of an encoder, turn the
motor shaft any amount and watch for a clean square wave. How can I check a
resolver?
Any help is appreciated,
Bart
that use resolvers instead of encoders for positioning feedback from DC
motor driven movement. The resolver reads revolutions (or parts of) of the
motor shaft. Is there a way to check to see if the resolver is working with
a DMM? I've read they use AC voltage (some up to 28 vac) and measure a phase
shift, using terminology like "a rotating transformer", and I'm still
confused. I'm up to speed on quadrature encoders (square waves) but would
like to grasp how to check a resolver, even if just to see if its dead.
Normally I place my scope on one of the four wires of an encoder, turn the
motor shaft any amount and watch for a clean square wave. How can I check a
resolver?
Any help is appreciated,
Bart