I have a question regarding the motor selection:

I have 600W AC servos in my possession that I'd like to use for this build instead of the NEMA 34 motors.
They have a continuous torque rating of 1.91N.m. - and with the 10mm lead ballscrews, I will get 1200N of linear force.

The gantry and all components attached to it weighs in at 100kg. From dual-driving the gantry, the combined linear force of both motors amounts to 2400N.

Is this enough to move the gantry with a reasonable factor of safety?