Servo motor control with Mesa 8i20 and Mesa 7i76e

Hello,

I already have a mesa 7i76e board, for controlling my retrofitted bench lathe. I also have a tamagawa ac servo motor, bought from a flee market from someone who didn't knew what he's selling.
The motor on my lathe is a 1.4kw universal motor with some speed sensor that tries to keep constant speed.
I would like to replace that motor with an ac servo motor. I can find quite cheap servo motors but without controllers.
I recently saw that Mesa 8i20 is again in stock and I'm evaluating buying one of these drives.
Since its the lathe spindle I don't necessarily need to control the position (though it would be nice to be able to stop the spindle in a specific position so that the chuck key is always in the right position)
I only need to keep the constant speed and have the full torque on the entire speed range.
Is this possible with Mesa 8i20?
If i already have a Mesa 7i76e controlling that lathe, what else do I need to have in order to control that Mesa 8i20.
The lathe runs at 220V AC, 50hz that means I would need to convert this to DC for the drive. Can I use a rectifying bridge + capacitor filters to power up the Mesa 8i20 for the motor?

I might be asking stupid questions for some, but I'm just a passioned hobbyist

Thx,
Vasi

Getting this to work depends to some extent on what type of encoder is on the
Tamagawa servo motor (and the motors rating)

Do I really need the encoder if I don,t want positional control?
I think its a resolver, looks smth like a smaller motor. It has windings like a motor.

Yes, some kind of encoder is required to be able to commutate the motor

The motor drive needs to know the rotor angle relative to the stator to know which windings to
activate to pull the (permanent magnet) rotor in the desired direction