Servo motor wiring

Dear all homemadetools-ers!
I ask a little help from you.
Recently, I bought from a used things market, a servomotor. It also has a reduction gear attached to it. My intention is to use it at my milling machine to achieve a constant speed of X axes feeding.
My requests are:
1. What means the color of 7 wire of servomotor? I believe red wire and black wires are to connect them to 220 volts AC. Green/yellow is for ground for sure. But how about blue and orange? Or those 2 grey slim wires?
2. How can I connect the motor to a driver to achieve a variable speed and CW or CCW direction of rotation? Could I use an Arduino board as a driver?
3. How should I check it to see if it is running or it is broken?
Below I have attached 2 pictures of servomotor.
Here I found a link to my servomotor:
Item # IHT8PF25N-25, IHT Induction Motor with Tachogenerator & Speed Control On Japanese Products Corp.
I prefer to do my project all by myself as DIY.
Please guide me with everything you have. Please, be patient if I put more follow-up questions.
Thanks in advance!

I detected those wires:
black and orange go to 220 volts AC and run the motor. I already have tried.
blue and red go also to 220 volts AC and run the motor also.
2 grey wires are from an encoder mounted on other side of motor arbor. Probably they count rotation of rotor arbor.

Attachment 33600