The Machine Requires a Software Update
Update the machine to the latest software version. For mills, use software version M18.21C or later. For lathes, use version L11.17C or later.
The Ethernet Cable is Too Long
Avoid the use of Ethernet cables longer than 100 feet (30 m). Use a switch box between long lengths of cable to boost the signal.
Electrical Interference in the Ethernet Cable
Strong electrical currents flowing through cables can create interfering signals in the Ethernet cable.
Keep the Ethernet cable as far away as possible from electrical cables. Do not attach the Ethernet cable to the machine’s power cable.