 |
The secondary cage and
the mirrorbox are kept at the right distance
from each other by means of the truss assembly. I have studied many
solutions to attach the trusses to the secondary cage and mirrorbox and
I have choosen to go for Kurt Maurers system, as shown in the picture.
The trusses are made of 1.2 inch outside diameter, 0.059 inch wall
thickness aluminium tubing, just like the struts of the secondary cage.
They are, at both ends, attached to each other with 1.2 inch wide, 0.12
inch thickness aluminium angle. This aluminium angle also has the
function to attach the truss assembly to the mirrorbox and the
secondary cage. To attach the truss assembly to the secondary cage, I
copied Kurt's system, as shown in this picture. The bolts on
top of the aluminium angle are attached to the lower ring of the
secondary cage with wingnuts.
To attach the truss assembly to the mirrorbox I used a
variation on Kurt's system. The trusses are bolted to the aluminium
angle. The aluminium angle is fastened in the corners of the mirrorbox
with a big knob. The blocks pressing the angle in the corners a skewed
off, pressing the the aluminium angle firmly against the walls of the
mirrorbox. In these four pictures is shown
how things are done.
The system works perfect! It takes no longer then 10 minutes
to assemble the telescope and a bit less to disassemble. If I work
accurately, I do hardly (if at all) need to recollimate the telescope
after setting it up.
|
