Rolando,

 

    For some time now, I have been considering an idea like your head & counterweight interaction, below, to protect (not my head), but the telescope from a pier collision.

 

    It should be possible to purchase – perhaps  from a science shop like Edmund Scientific, etc  – an “air pressure control switch” based  sheet, like those floor mats that some stores use to start up a kiosk PC when a customer steps onto it. The idea is to wrap the sheet fairly loosely around the pier and mount – as best you can, and tape the end seam forming a cylindrical vertical collar – or even two of these, one for the pier and another smaller section around the mount, if shape is a problem. . If  the mount runs the scope or camera anywhere into that contact zone, (or even into iself, as mine ran the scope into the AZ adjust knobs), the air pressure difference in its bladder activates a KILL switch to remove power from the mount, perhaps along with a flashing warning light.

 

    Or, with a bit of Ray’s programming, the contact closure could also be tied to a spare unused signal pin on the CP3 DB-9 port, which the AP Driver could read and emergency stop the mount, or at the user’s option, PARK it.

 

    I think such an air pressure switch might provide a potentially “fail safe operation” of any mount, and might make for a good AP accessory product. It is water and weather proof, shouldn’t  freeze in the worst winter, and can be tucked around any size mount, or pier,  to handle any length OTA & camera, if made in various lengths. It could be based on an air bladder, or two conductive sheets (like the “old technology”,  touch sensitive PC screens), which act as a switch when they are brought into contact to the scope, anywhere on its surface. A 3/4 inch thick foam  switch-pad,  might also provide some paint & dent protection, as the scope slows down into the collision.

 

    The only difficulty might be wrapping it under a rats nest of cables, some people have. But probably worth the effort in tucking it under the mess..

Might be worth buying one of those “kiosk mats” for testing.

 

Opinions?

Joe Z.