What servo to buy for this controller?

I think you need a servo amplifier with analog speed input plus a servo motor, the cable that goes between the amplifier and the motor and the cable that goes between the motor encoder and the encoder input of the Acroloop. For some controllers, the encoder cable goes from the motor encoder to the amplifier and then another cable with the encoder signals goes from the amplifier to the controller.

It would be overkill for this application, but I am partial to the Yaskawa Sigma Mini ( you will need to fix the word wrap in the following link)

You can buy them through Minarik

Who carry a lot of other motion control equipment.

Can the following amplifier be used instead ?

I never thought how complex servo motor control is until I undertook this project.

Nobody uses servos unless it is the only way to accomplish the task... and the hardest way to do servos is to mix and match components from different manufacturers. On the other hand, if your objective is to learn about servos, this is a good opportunity.

That amplifier looks OK, but I would talk to the applications people at AMC first. Then I would draw out the whole circuit with every wire and connection and study it until I was sure every signal interfaced OK. Is the analog signal going to have ground reference problems? where is the velocity loop being closed? where is the position loop being closed? where does the DC power for my amplifier come from? does my encoder have the right number of lines? etc, etc.

After the electrical design is done and the hardware built, the fun of tuning the servo begins.

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