If the servo drives can accept +/- 10v then yo will almost certainly be able to use them in conjunction with the motors you have.
Regarding feedback to the IP-A , the servo drives may well have an output that simulates a 5v ttl encoder, if it does then you should have no problems. If the signal is other than 5v ttl then you could fit an encoder to either the motor or the ballscrews so that you can then feed that back to the IP-A.
Hood