> What if, instead of the traditional teflon/nylon pads that are on the
> base of a dobsonian mount, you used rollers instead? If they were short
> the differential rotation wouldn't be a problem (and if it was, you could
> use ball bearings instead)
<snip>...
> Has anyone tried this, or heard about it?
>
> -Dave Boll
The odysseyII cones with the nylon-pad mounting and a BIG nut&bolt holding the turntable together. It works okay, but if you don't keep track you can end up tightening the nut & bolt, or undoing them. It's fairly easy to replace the nylon & bolts with an "appliance" lazy-suzan bearing. It does make it "much easier to turn" as in the sonotube invariably gives accurate wind direction updates. When the motors go in, I'll bolt in a used flywheel "ring" gear, or use rubber wheels and friction. That should take care of the wind direction updates.
Now then... does anyone out there have a good source for gearboxes? Say something in a 30,000:1 ratio? I've got these two variable-speed reversable DC motors, that go from about 10RPM @ 4V 2A, to about 30RPM @ 12V 2A (top out at 66rpm @ 36v 2a). I need to gear them down a weee bit for the 'scope...
Thanks, and good luck!
-mike
------------------------------------------------------------------------------ Mike Deliman <> miked@wrs.com <> phone: 510-748-4100 <> facs: 510-814-2164 Wind River Systems, 1010 Atlantic Ave, Alameda CA 94501 USA;http://www.wrs.com ------------------------------------------------------------------------------
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