Antenna Assembly Construction (EL Rotatable Structure)
Antenna Assembly Construction (EL Rotatable Structure) #4
The center section and ring truss were installed. The center section is supported from the Az rotatable structure via the EL spindle and bearing. The ring truss is supported by it. The ring truss itself supports the main reflector.
A hoist (elevator) is installed to access the EL spindle.
Antenna Assembly Construction (EL Rotatable Structure) #3
The EL spindle / bearing and sector frame were attached. The photo below is the bearing part of the EL drive part.
The photo below shows the shaft attached to the EL bearing.
The EL shaft is attached.
The EL shaft installation is complete.
The EL sector gear waas installed. The arc-shaped one is it.
Antenna Assembly Construction (EL Rotatable Structure) #2
To assemble the EL spindle-bearing, the center part of the sector frame is installed.
Antenna Assembly Construction (EL Rotatable Structure) #1
We have started assembling the EL (elevation) rotatable structure. It has the role of rotating the antenna in the elevation direction. The photo below shows the EL drive mechanism (motor and reducer) mounted on the Az rotatable structure. The EL drive mechanism consists of 4 sets, and two of them are arranged on the left and right with respect to the center (cylindrical one in the center: the master collimator). The tip of the motor has a gear to match with the EL sector frame (sector gear).
This is the first set of EL sector frames. The gray part is the counterweight (weight to balance with the primary mirror side).
This is the second set of EL sector frames.
Lifting of EL sector frame
Two EL sector frames are connected to the EL drive mechanism.
