TWO TREES SAPPHIRE PRO GT2 Belt Tension

UPDATE

I’ve made additional modification on pulley arm, first version was kept in place with the pin(s) but new - ARM 2 has a thread and nut allowing fine(er) adjustment and looks more "civilized". :-)

Have seen few attempts to solve the sagging belt issue on Sapphire and other CoreXY printers.

For some reason all efforts were to introduce some kind of mechanism inside the carriage where in most cases space is very limited, in case of Sapphire it is just microscopic.

How effective are those solutions not for me to judge, don’t like and never tried.

My approach – minimum to none printer modification and no monstrous builds, simplicity and reliability.

With my mod, you have to print just couple of things and what you may need more – two ball bearings with size: OD 16mm, ID 5mm and H 5mm (625ZZ).

Installation doesn’t require making any extra holes, unit body just clamps on upper (6mm) plate and works on - PULL.

Obviously, belts must be fixed on gantry with reasonable tension and any leftover slack can be retrieved with help of the unit.

All parts are designed with tight fit to each other so keep in mind plastic shrink after cooling.

Not sure but most likely "device" can be used on other SAPPHIRE printers/modifications as well, certainly similar approach can be utilized on all other CoreXY printers.

Print Settings

Printer:

TWO TREES SAPPHIRE PRO

Rafts:

Supports:

No

Resolution:

Infill:

20-25% on main body, all other parts - solid

Filament:

No brand, something from china PLA

up to you

Notes:

Category: 3D Printer Parts