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10" Newt to Dob Base

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Whilst I have my imaging mount running my 250P-ds is sitting there redundant. So I thought I'd have a go at building a Dob mount for it and hopefully motorise and add goto eventually.



Here's my initial sketch with the bearings running on the sides. 

I wasn't too happy with the drag factor and possible misalignment causing issues so decided on using ball bearings.



The second iteration makes it easier to add a worm and wheel to the spindle and the ball bearings can be adjusted for alignment.


The final iteration adds some amount of lightness.



I'll be making this from acetal sheet with aluminium cross bars.

Base/Azimuth is 550mm diameter x 8mm thick, sides 360mm x 700mm x 10mm.

I should be able to take out some more material from the base depending on where the motor, worm gear and lazy susan bearing fit.


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Made a lot of progress in the last week or so.


Used a template to route out for the 30mm spindle and a trial fit of the lazy susan bearing.

Also did a quick test assembly, this proved a little too wobbly with just the aluminium bars so has a rethink.





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