One lathe has Servos and Drives from Automation Direct, one lathe has GSK Servos and Drives, and another is just running steppers. All with the HiCON Integra.
We have an SL3 that me and my brother want to get the closed loop feature added on to just to see what kind of difference it makes, but we have really had great success with all 3 lathes without the closed loop feature.
Most of our I/O is being controlled through a PLC. Much more stable signal and if I have any random ideas for the machine, I can run them through the PLC and not have to worry about Mach taking care of trivial things, like the lube pump or chip conveyor.