We bought emcoturn 425mc with sinumerik 810T operating system few weeks ago. I have never used and program machine like this with two spindles. Maybe somebody who have more experience could help me. I found some programs on machine from previous user and i am trying to understand it i but i have few questions: 1. G53 code works only for one line i dont have to writ G54 after it? Line N220 2. What does code @714 do? Line N110 and N840. 3. In this program i found all T and D numbers from first turret how does machine knows D numbers from second turret because there are working both turrets with this program.