Dob base movement.....

[Bluenosebatty]

As promised more questions when using my new scope....8-)

I remember reading over a thread on here regarding this problem but cant seem to find it again so hope you guys dont mind me asking again, here goes....

So i built My dob and it is all set up but the movement seems a bit more stiff than looking at the movment on video reviews ect, ive not over tightend the bolt between the two bases and to be fair the less i tighten it dont seem to make it any easyer to turn, ive defo got it built as the destructions say so i was just woundering is this a common problem/fault and is there anythin i can do to it to help make the base more easyer to turn?

Thanks for any advice, why the weather is horrible i thought i may aswell get everythin out the way so its done,

Cheers

Mark

[John]

There is the old "milk bottle washer" mod which works well to smoothen out the azimuth motion. This web page might help (the Orion XT10 very similar to the Skywatcher 25OPX):

Motion Tips

[Bluenosebatty]

Cheers john mate, il have a look at that.

[davehunt]

In the end,you will be tempted to put a "Lazy Susan" bearing between the two base circles.300mm one available at Axminster Tools for about £14.00 Brilliant mod.

[johninderby]

Even better solution. Telescope Service sells the EbonyStar laminate in pre-cut rings for dob bases. The best Az bearing material there is.

http://www.teleskop-express.de/shop/product_info.php/language/de/info/p3876_Ebony-Star-Ring-D-40cm-zum-Selbstbau-von-Gleitlagern.html

John