In your code, you are setting the actual conveyors velocity. That will not do anything if the conveyor is anchored. Also, I do not think it will do what you intend even if it wasn't.
One thing you have to keep in mind when using the "Touched" event is the parameter or part that will be triggering this event.
Also, you are not using the correct format to changing the velocity of something. You must try using Vector3.new()
01 | Dropper = game.Workspace.Dropper |
02 | Catch = game.Workspace.Catch |
03 | Conveyor = game.Workspace.Conveyor |
05 | function SpeedOfConveyor(part) |
06 | part.Velocity = Vector 3. new(- 30 , 0 , 0 ) |
11 | script.Parent.Touched:connect(SpeedOfConveyor) |
See if that works.