i notesed this that wen i repair with repair pack they start working again but wen a bot or other thing effects it or heals it to 100% the script is still disableing it despite the repair from other source than the repair pack.

Robots don't reactivate buildings, only when the player repairs the structure to 100%.

This is because there is an event to capture when a player repairs a structure, but there isn't an event for robot repairs in the vanilla game engine.

so using robots in this mod is usless?

I wouldn't say robots are useless they just don't immediately restore a machine to active.
The idea being that you still have to plan for factory failures, but you don't have to repair things by hand.

There should be a mod option to enable this behavior now.