alliraspecifications.html

Anssen Technologies.
Designers and Manufacturers of Astronomical Instrumentation.

Allira Series™ of Equatorial Fork Mounted Telescopes.

Design and Manufacture Philosophies.

Right Ascension and Declination Housings

RA and Declination housings are manufactured from precision cast aluminium.

The housings offer light weight but extremely high sectional rigidity despite heavy loading forces.

Critical dimensions of the castings, as with all of the machined components of the mount (unless otherwise stated) are manufactured to within 0.01mm tolerance.

Gear Reducer and Motor Housing Assemblies

The gear reducer/motor housings are finely machined black anodised aluminium components. Each housing is assembled with stainless steel socket head cap screws to add to the final appearance. The design of the housing promotes rigidity and compactness, whilst making the gear reducer and motor very accessible. The entire housing can easily be removed from the mount for servicing and cleaning without removing the telescope, or the mount.

The design of the housing enables adjustment to be carried out as required at any time.

Gear Reducers

The gear reducers fitted as standard equipment are high precision planetary and rated to 12NM torque capacity.

Fasteners

Stainless steel fasteners have been used almost exclusively throughout the construction of the Allira mount. Stainless steel enhances the final appearance of the mount whilst ensuring a corrosion free operation when used in corrosive environments.

Painted high tensile steel socket head cap screws have been employed on highly stressed junction points such as the Declination housing to RA shaft and the Declination endplate to Declination shaft. Such use promotes high strength and rigidity, and reduces flexure.

Gear Clutches

The RA and Declination clutch system is integrated into the clutch assemblies. Eight grub screws are located radially on each clutch which adjusts the clutch tension from zero to fully locking. By use of the clutch system the telescope can be moved manually (ie manually pushed) into position by the operator and then fine adjusted via the electronics without the need to manually lock or unlock as a separate operation.

We do however recommend not to lock the clutch completely. If the clutch is completely locked and the telescope is accidentally bumped the shock can be transmitted through to the gear reducer causing possible damage.

Specialised Equipment

Anssen Technologies provides a specialised design and construct service for the supply of additional equipment such as telescope saddles, support equipment and accessories for most types of instrumentation. Please contact Anssen Technologies for further information.