The MountOne STL Set.

The MountOne GOTO Telescope Mount STL Set.

This set contains the basic STLs needed to print and build the MountOne GOTO Telescope Mount. You will need to source all your own hardware and electronics.

The MountOne STL Set is available to download from the following websites,

• MakerWorld.
  
• Printables.
  

The MountOne CAD Pack is also available, and contains all digital resources for The MountOne.

• STEP Files, including the Main Assembly.
• STL Files, full sets with all calibration sizes.
• F3Z Fusion Files, the fully-editable Master Assembly.
• PDF Files, Bill-Of-Materials with Fixings & Printed Parts.
• 3MF Files, for Bambu Lab X1C & A1 Mini.

The MountOne Hardware Kit is available too, and contains all the fixings and hardware required to print and build The MountOne. Just add electronics.

The MountOne GOTO Telescope Mount.

The MountOne GOTO Telescope Mount uses two high performance 0.9° stepper motors coupled to two 5-stage 405:1 belt-driven reduction-drives. This configuration removes almost all backlash in the motion system. The MountOne is able to track with a computed  resolution of 0.25 arcseconds per-step while still being able to slew at 3° a second.

Eighteen bearings in the DEC & RA axes provide smooth and jitter free movement. Genuine Gates 3GT belts are used for each compound stage and are individually tensioned for optimal performance.

Integrated Slip-Rings pass power and signal data between the MountOne and one of four attached astrographs. 

OnStep firmware controls the mount and provides a data-link to a huge range of astronomy software packages via one of four attached astrographs.

The Printed Equatorial Tripod (PET) provides polar alignment between latitudes of 30-90°.

The MountOne GOTO Telescope Mount, Printed Equatorial Tripod, and Four Astrographs can all be printed on machines with a build volume of 180X180x180 or larger.

The MountOne Documentation.

MountOne © 2026 by Hexaxes Ltd. Licensed CC BY-NC-SA 4.0