Following Bryan's question in my WANTED thread:- I want a cheap option, no electricals and to be able to use the collimation bolts as normal without having to disconnect anything.
OK, here is the plan:-
Fit sprockets to the two top collimation bolts, just under the mirror cell and inside the frame. Drive these by a chain drive to smaller sprockets on two shafts that run down the inside of the mirror box (yep, paint all surfaces above the mirror matt black). The shafts terminate just under the top of the mirror box. Suitable supports top and bottom with roller bearings are connected to the side of the box - being careful not to have the screws for the lower ones protrude and hit the rocker box. Lower support on springs so I can adjust chain tightness externally. Fit two covers above holes cut through the top of the miror box that the shafts almost reach. (have already found a suitable spring loaded cover at Jaycar)
So open the spring-loaded covers, poke in flexible drives with appropriate fitting on the end - just a square socket should do, then I have two knobs within easy reach with which I can adjust two primary collimation bolts. No need for power, no motor overshoot problems. Collimation completed, remove the flexible drives and close the covers.
All that we see from the top should be as attached image.
Lots of planning and testing needed before any drilling and dismantling starts.
