I did remove the HA-80C motors and replace them with motors/ amplifiers from MR-J2S series amplifiers that use SSCNET II with the help of Dmitry. I did that to avoid using analog control.
I also did test the HA-80C motors with Argon driver from granitedevices and are usable in booth sped and position control.
The spindle FR-SF is is still on the machine and is driven with analog voltage from SSCNET card. The one I have has a PLG with 128 pulses so for orient and position should require an additional encoder for better positioning.
