Servo Motor & Driver

Hi all,

I was asked by a friend to look at a Taiwan made ACRA Vertical NC Mill
(year 1996 or 1997) today wherein the controller is dead and to find
out the feasibility of converting it to a CNC using Mach3 or EMC. Here
are some details:

1) The servo motor has a name plate that says: Special VR Motor made
by Servo Products Co., Pasadena; Voltage - 350VDC; Torque - 115 in-lb
(continuous); Current - 6 amp/phase; 3 phase; 3.2 Ohms/phase; 400 RPM
2) The servo driver board says ZD-6363 Rev I.
3) This is a 3-axis NC mill with 3 HP Induction Motor for the spindle
controlled by a VFD.
4) It wasn't in use for about 2 years and it boot up Windows 98. After
which, it will not go into the software controller.

Since I am more used to Stepper Motors/Drivers, and totally ignorant
of Servo Motors, may I ask for some assistance for the following:

1) How can I test without going thru the controller if the servo
motors and/or servo drivers are still alive?
2) If the servo drivers are dead (most likely, as someone previously
worked on it and gave up), what alternative servo driver can I use?
3) Is it advisable to use stepper motors/drivers to replace the servo
motors/drivers in the same holding torque range? If not, and if I need
to replace the servo motors as well, what newer model of servo motors
and drivers can I use? Take note that the servo motor has a continuous
torque of 115 in-lb (about 13 Nm or 1,840 oz-in).

TIA for whatever info you can provide.

WT