Training, Installation & Service Manual - Livewire Connections Ltd

Removal and replacement of ADU modules
9.5.7 Replacing motor and encoder
The ADU is equipped with three (3) DC-motors, two of which are
identical, and one (1) step motor, for the axes:
• Elevation (DC motor).
• Azimuth (DC motor).
• Cross Elevation (DC motor).
• Polarisation motor (step motor).
The DC-motors are all brush less motors, controlled by their
individual DDM. The step motor is controlled by its PMM. To each of
the DC-motors and step motor a corresponding encoder provides
feedback of its position.
Elevation
motor & encoder
Azimuth motor
Azimuth encoder
X elevation
motor & encoder
For step-by-step instructions see:
Polarisation
motor
Figure 9-34: Motors and encoders
Removing the Elevation Motor and Encoder on page 9-35
Inserting a new Elevation Motor and Encoder on page 9-37
Removing the Azimuth Motor on page 9-40
Inserting a new Azimuth Motor on page 9-43
Removing the Azimuth Encoder on page 9-45
Inserting a new Azimuth Encoder on page 9-47
Removing the X Elevation Motor and Encoder on page 9-49
Inserting a new X Elevation Motor and Encoder on page 9-51
Removing the Polarisation Motor on page 9-53
Inserting a new Polarisation Motor on page 9-53
Removing the Polarisation Encoder on page 9-54
Inserting a new Polarisation Encoder on page 9-54
Polarisation encoder
9-34 Chapter 9: Service & maintenance 98-133966-E2