Re: ATM 18 point Mirror mount

[PFAFF2@delphi.com (Robert C. Pfaff)]

>Questions:
>
>The triangles are on ball joint type hardware used in Model Airplanes.
>Each triangle is free to tilt in any direction.  Does the arm that
>connects the two triangles together also need a ball joint type
>connector or can it have a single axis of freedom much like a balance
>beam scale?

Use a single axle  approach. You do not want the arm to tilt side ways.


>I have seen some pictures of other mounts on the web which use springs
>to keep the triangles in the proper orientation.  Dobson's video shows
>the use of thin paper for the same reason.  Which is better?

They all work well. JMI uses single a thin plastic ring that attaches to
all of the triangles. The ring is about 1" wide and maybe a 1/16" thick.
I use 2 pin extending from each the triangle that go on each side of the arm.
The pins are wide apart enough to alow any tilt needed of the triangles.

Bob Pfaff