OLD Lathe conversion to a CNC

What error do you get? Delayed sserial communications have no effect on Ethernet timing.

Sometimes I get this warning:
hm2/m2_7198.0: Smart Serial port 0:Dolt not cleared from previous servo thread. Servo thread rate probably too fast. This message will not be
repeated, but the hm2_7198.0.sserial.O.fault-count pin will indicate if this is happening frequently

PS I'm wondering if I should try using an external LAN card in a PCI slot. What kind of PCIe x16 LAN card should I get?

Have you tried a 2 ms servo thread?
 

I haven't tried it yet. But I think if this computer isn't good enough, I should try a new LAN card or even a new PC. I already have a hydraulic chuck and an additional servo motor waiting to be installed. The plan is to be able to mill on the lathe. I want to have a fast servo thread

I can't explain why there are such delays in internet communication. In many places, I see mentions that a servo thread of up to 4 kHz is possible on network cards.So, should I try a new network card first?