gfletcher Posted July 24, 2018 Share Posted July 24, 2018 Anyone any ideas how to improve the altitude movement on a Meade Lightbridge 12” ? lt is not smooth in movement and hence difficult to perform small movements. Link to comment Share on other sites More sharing options...
tuckstar Posted July 24, 2018 Share Posted July 24, 2018 (edited) Has it already got a lazy susan bearing? Sorry just realised you said altitude not azimuth. Edited July 24, 2018 by tuckstar Link to comment Share on other sites More sharing options...
gfletcher Posted July 24, 2018 Author Share Posted July 24, 2018 That seems to be another problem in azimuth. It has the standard bearing but probably 300 degrees rotation is free moving but the last 60 degrees seems to stiffen up. Any ideas? Link to comment Share on other sites More sharing options...
gfletcher Posted July 24, 2018 Author Share Posted July 24, 2018 Could it be warping of the base plate! Link to comment Share on other sites More sharing options...
gfletcher Posted July 24, 2018 Author Share Posted July 24, 2018 can you suggest a size, supplier for a lazy Susan bearing? Link to comment Share on other sites More sharing options...
Brantuk Posted July 24, 2018 Share Posted July 24, 2018 (edited) Graham - check out my dob box build thread - the alt/az bearings that I use work really well for me on the 16" LB. It might give you some ideas that help. Ultimately the alt bearing depends on balance (achieved with counterweights). ? Edited July 24, 2018 by Brantuk added link Link to comment Share on other sites More sharing options...
gfletcher Posted July 24, 2018 Author Share Posted July 24, 2018 How do I find that thread Kim? Link to comment Share on other sites More sharing options...
Brantuk Posted July 24, 2018 Share Posted July 24, 2018 Added the link for you Graham - see above ? Link to comment Share on other sites More sharing options...
Smithysteve Posted July 24, 2018 Share Posted July 24, 2018 (edited) Hi, I had the same problem in azimuth, warping of the rocker box base... I used the original azimuth bearings on mine, but changed the base board and rocker box. This totally cured it. The altitude prob is likely to be same as mentioned by Kim, balance. If the scope is not balanced, then you tend to overtighten the brake and this causes scope to jerkily move... cheers! Edited July 24, 2018 by Smithysteve Brantuk 1 Link to comment Share on other sites More sharing options...
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