unwinder

Hello,

I'm making a unwinder for unwining PA12 tubes (see foto). For this I use 2 servomotors, M2 to power the reel and M1 that 'pulls' the tube. only 1m of tube needs to be unwind each time that means 1 reel turn, so it's a very dynamic process.

I want to do this with indirect torque control between the 2 servomotors, using a S120 drive, S7 1200 with tia portal software and starter. What's the best way to program this? and what telegram should I use because I only see telegrams for speedcontrol.

Thank you in advance.