Azimuth Servo Bond
The azimuth servo bond fixes the rudder of the azimuth servo to the azimuth arm.
Construction
| 1
Cut out a sheet of suitable plastic. I use Creativ(TM) Hartschaumplatte.
The material can be cut (slowly) with hot wire cutter and wood screws
can be used in it too. We need a piece with measures 10x4cm with a thickness
of 3mm. I call this peace bond plate (the blue plate in the picture at the top) |
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| 2
Bolt down the four arm servo
rudder to the center of the bond plate which is itself placed on the azimuth arm. It
is placed on the lower side of the arm near the front, leaving 8mm
space to the front position. |
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| 3
Once the screws are fully in, take off the bond plate from the azimuth
arm. The XPS material is reasonably soft to do so. |
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| 4
Pierce a hole in the very center with a graver and widen it with the
Phillips-tip screwdriver until the servo fixing screw goes through it.
(take care that you do not widen the hole of the rudder itself). |
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| 5
Set the rudder (fixed to the
bond plate) onto the servo. Do not put in the servo fixing screw yet.
The
servo cable is front, that side will be directed south later then the
heliostat is mounted. Check now the turning range of the azimuth servo
bond manually. It must be able to turn completely to the west and
completely to the east within the allowed servo range (which is
slightly larger than 180°) If neccessary take off the bond plate
and place
it again until it can reach the positions shown below. |
| west |
south |
east |
 |
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| 6 The bond plate is now in a suitable position. Fix the rudder to the servo with the screw (here black) contained in servo additionals. |  |
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7 Place the bond plate
again on the azimuth arm using the holes in the XPS which you made in step 2
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8
Cut two 10cm, profiled borders from XPS and place them at the long edges of the bond plate. There should be
about 4mm free space beetween the borders and the bond plate. Note: It
is difficult to make this part exactly when you do it manually
using a hot wire
cutter. Usually the inner part of the profile will not be completely
smooth and the free space might be not exactly 4mm. However, this is
not such a big issue as long as the long sides of the bond plate are
azimuthally fixed this way.
Check one more time whether you put in the rudder fixing screw and then
glue the borders to
the azimuth arm
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   |
| 9
Cut two small XPS-pieces to enter them into the free space. The
measures are 4x4cm with a thickness of 4mm. However, as the free space
might not be very exact, cut them first slightly larger and fit them in
gradually. They should not go in too easily; this way they will stay in
place by themself. |
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10 You can set now the azimuth arm with the connected servo into the mount |
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