Hi guys!
Some time ago I was asking about a balance issue, because once I added a barlow to my ep, front of the tube was going down while observing objects low on the sky. I tried to cut and reposition teflon bearings but it helped just a little bit.
I also installed a new focuser, which was even heavier then my old one, made out of plastic plumbing parts. Because the focuser was also higher I had to push mirror up in the tube, which all together caused even more annoying balance problem.
Check out the attached pics. I added two springs that increase tension while the tube goes down. Springs by themself appeared to be not sufficient enough and tensioning them too much caused some rough movement. So I added some weight at the bottom part of the tube, simply fastening heavy bolt with nuts and washers there. Mayby it doesn't look too good, but it works great with any combination of barlows and eps. No unwanted movements and smooth action!
Some time ago I was asking about a balance issue, because once I added a barlow to my ep, front of the tube was going down while observing objects low on the sky. I tried to cut and reposition teflon bearings but it helped just a little bit.
I also installed a new focuser, which was even heavier then my old one, made out of plastic plumbing parts. Because the focuser was also higher I had to push mirror up in the tube, which all together caused even more annoying balance problem.
Check out the attached pics. I added two springs that increase tension while the tube goes down. Springs by themself appeared to be not sufficient enough and tensioning them too much caused some rough movement. So I added some weight at the bottom part of the tube, simply fastening heavy bolt with nuts and washers there. Mayby it doesn't look too good, but it works great with any combination of barlows and eps. No unwanted movements and smooth action!
Attached Image:
8" f/5.9 truss tube newtonian, made from scratch 8)
