I got tools changer problem on Mazak integrex 30. Operator said this problem started 2 years ago but I am only start working in this company.Operator said they did manually tools changing on this machine by hand.The machine is still running.but if they use tool changer system on machine ATC alarm come on and tools changer system was stop anywhere.i would like to have but this machine is always busy.i think sensor problem.Iam not very good electrician,so anyone can help me out where to look and how to start doing fault finding.