Belt drive is on most of the 3d printers even Delta Robot 3D Printer.
PS: RobotDigg think that Threaded Rod Linear Stepper Motor would be the great solution to Delta Robot 3D Printer like Rostock even though 3ders and makers are trying to make it much cheaper to use Fishing Line.
101 Teeth 202mm Long Closed-loop GT2 Belt
Open ended GT2 Belt is good choice when we are not sure what length is exactly we need or we are sure a long distance transmission and postioning needed (The reason we use open ended gt2 belt on Rostock). It's cost performance but we have to Clamp the Open Ended GT2 Belt. However you clamp the open ended gt2 belt, it costs you time and money.
If you are sure what length you need or you just design your 3d printer according to the materials you have in hand, Closed-loop GT2 Belt is good.
In conditions of short length and CYCLE transmission, closed-loop gt2 belt is the only choice because you want the belt drive in loop and no way to Clamp. It's not like the open ended when printing only a short length part of the whole belt go back and forth.
