You’d need to create the servo, or if there is one already in the system, adapt it with the torque and speed of the RS-1270.
Based on simulation? That is a lot of work for a very theoretical result.
You would need a torque vs current curve to know the current at a given torque (and voltage), which this product does not have.
“Smart servos” provide torque and current feedback in real time.
This is beyond the support we can provide. Perhaps another member of the forum can provide some insight.