script.Parent.Parent.Conveyor1.Velocity = Vector3.new(0, 0, -10)
Doesn't work.
It seems like you're trying to make a conveyor belt. Anchor
the part first before changing its Velocity
so that it works as expected.
script.Parent.Parent.Conveyor1.Anchored = true script.Parent.Parent.Conveyor1.Velocity = Vector3.new(0, 0, -10)