[Moon] 23cm Dish project

[Hakan Harrysson]

Hello MoonBouncers!

I am completley new to encoders so forgive me if i am thinking in wrong direction here,,

I could need to see some pictures how you have got 100% accuracy between the movement in dishmount and US digital encoders.


I have one solution on the elevation where i am thinking to mount the encoder in the end of the shaft that moves with the dish when elevated.  It will not be any difference where the shaft points and the dish.  (this way encoder will only move 90 degrees)

I will not measure in the rotator as it could be a possible misspointing there but where the mount points the dish points so there will be where i will mount the encoders.


I have 2 ideas on the Azimuth and the first one is that i shall build the rotator in that way that i can place the encoder in the bottom of the centre of the pipe that i shall use for AZ.   This way the encoder will only travel 360 degrees and maybe it should be wise to have it going many more turns for higher accuracy?

It should be easy to do that with a small belt or little chain but then i think i will add a little little misspointing.



Now when i am building everything from scratch using heavy duty gear i shall go for so high accuracy that i am able to point right on 3cm one day.  I have also been thinking on the towerconstruction so it dont moves when wind takes its grip in the 4M solid dish.

The motors that drives the gearbox is 12volt so it will be very cheap to have the dish tracking the moon 24/7 and if no one is at home and the dish keep moving there also maybe will have som burglar protection,, HI!


Sri for  bombing you with lots of crazy ideas but having fun with this project.





http://web.telia.com/~u37027643/sida5.htm

73 Hakan  SM7WSJ

PS:  I am also on the way to mount a dipole up where the centre of my VHF antenna will be mounted.  Using a rotator to measure how the noisefloor changes by polarity  but will come back with that report later.