Hello,
in the past we were using our okuma 5020L with the software CNC-first. It works well, but the computer has given up (win98) and we do not even longer have a license.
So I tried Edytornc it's open source. I use this manual for configuration:[url=http://abcmachine.com/?p=6]How to send *.nc files to Okuma OSP5000 CNC Lathe via Serial RS232