Z-belt drive for Ender 3 type printers

I have tried to design a simple belt drive system for the z-axis. If you want to do your testing without a lot of expense, just use the original z-axis motor and you can make it work, but the gantry will fall by gravity when the z-motor has no electrical voltage. That is why I have used a geared motor.

He intentado diseñar un sencillo sistema de transmisión por correa para el eje z. Si quieres hacer tus pruebas sin mucho gasto, simplemente utiliza el motor original del eje z y podrás hacerlo funcionar, pero el pórtico caerá por gravedad cuando el motor z no tenga tensión eléctrica. Por eso he utilizado un motorreductor.

BOM:
2x M3 screw (20mm lenght)
4x M3 screw (33mm lenght)
4x M3 screw (25mm lenght)
5x M5 screw (30mm lenght)
4x M3 nut
5x M5 locking nut
5x idler pulley (bore: 5mm)
1x 2GT-20T pulley (bore: 8mm)
Belt 2GT 6mm
1x Nema17 Geared stepper ratio: 5.18:1

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