On Tue, 10 May 2016 16:38:56 +0100, M Philbrook wrote:

In article , says...

On Sun, 08 May 2016 15:13:56 +0100, M Philbrook wrote:

In article , says...

I know what a servo motor is, and that you can get servo amplifiers (or servo drives) to work with them, but what does it mean when a stereo system says it has a servo amplifier?

The amp is the part that actually handles the high currents in the
motor coils.

The rest of it before that is the controller that generates the
signals and monitors the motor's position vie the internal feed
back sensors of the motor.

The control could be programmed to generate signal steps per step
command or scaled, meaning that multiple steps can be generated per
step command.
One step of the motor normally is governed by the type of motor
and its feed back system..

For example, systems with internal encoders of 5k or more per
turn have step spaces of 5K or more. etc..

The amplifier can be a dummy type or it could have additional
functions for current controls for step move and control settings
for holding positions etc. Normally additional IO is set up to
trigger these options from the controller itself.

It's best to get the controller and amp together as one. Also
depending on the system of design in mind, you can op for a
master power supply to serve a rack of servo drives or get
stand alones.

Er yes.... but I have a stereo system amplifier which mentions servo. There's no motors involved.

You must be referring to using a dual amp in bridge mode to drive a DC
motor for positioning an actuator ?

That being the case, you need a feed back for the position that acts as
the voltage comparator feed back signal to the control input amp.


Something in the line of RC (radio control)supplies can get you those.

No, it's a stereo amp, for music through speakers. Sansui A-80.

--
Keep your nose to the grindstone, your shoulder to the wheel, your eye on the ball, and your ear to the ground. Then see how much work you get done in that position.