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Re: Achieving CWD

 

Bill,

Get a short "torpedo" level.? The one pictured is 9 inches long.? ?You then use the level and the hour markings on the RA and DEC axes.??

Start with the RA axis.? You rotate the counterweight rod to be about horizontal, then use the torpedo level to get that exactly horizontal.

Now use the marked RA dial and set it to be something convenient, like 12 o'clock.

Then rotate the RA axis back to CWD and use the RA marked indicator to show 6 o'clock (you get the idea...assure you are 90 degrees from horizontal).

For the DEC axis you can put the level on the dovetail, (with no scope in place) when the dovetail is horizontal.? Again note the indicator dial marking.? Then use the marked dial to rotate back to CWD position.

Have fun,

Michael

On Sat, Jan 23, 2021, 10:21 AM Bill Tschumy <bill@...> wrote:
Guys and Gals,

I believe some folks have said they use a level to achieve an accurate CWD position.? On my G811 there doesn¡¯t seem to be a great place to put a level.? I end up setting it on the worn cover? of the Dec axis worm.? That is not ideal because:

1. It assumes you have accurately rotated the Dec axis to 90?
2. It assumes the worm cover is actually at 90? to the counterweight shaft.

I realize that small errors in CWD are probably not that significant, but I was just wondering is there is a better way to accurately find CWD.

--
Bill Tschumy
Otherwise -- Longmont, CO
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