Re: 1200 Balance question


Aug 17, 2004

 


----------------------------

#10517 Aug 17, 2004

After a few days of sitting in the unopened boxes I finally got a chance to

use my new 1200GTO last night. It dwarfed my little 4" refractor and the

counterweight shaft weighs more than the scope. I do plan to use a 10" SCT,

but last night was a practice night.



Even with my scope, camera, and ST4 the mount was a bit out of balance.

Total weight on the mount is at maximum 20lbs, probably more like 15lbs. Can

the 1200 handle being a little out of balance and still guide well at 600mm

fl? Also, is it OK to not even use any weights, but just the weight of the

counterweight shaft to balance the mount. I assume this is OK, but have

never even come close to this issue with my 400GTO. Should I add some weight

just to get it in balance?





Thanks,

Scott Hammonds





[Non-text portions of this message have been removed]



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#10521 Aug 17, 2004

In a message dated 8/17/2004 10:00:05 AM Central Daylight Time,

shammonds@... writes:



> Even with my scope, camera, and ST4 the mount was a bit out of balance.

> Total weight on the mount is at maximum 20lbs, probably more like 15lbs. Can

> the 1200 handle being a little out of balance and still guide well at 600mm

> fl?



Absolutely. My 1200 mount setup with my 10" Mak-Cass is never in balance. I

shoot at 3700mm focal length.



Roland Christen





[Non-text portions of this message have been removed]



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#10526 Aug 17, 2004

With the small stuff on the 1200, I doubt the mount will even know

anything is on it g>



However, it's still always a good idea to have a some counter

weights so you can adjust and make sure the mount is always

slightly "east" heavy...this will ensure that the RA gears are

always in mesh. On heavy loads, Dec balance is important, but I

think much less an issue in your case.



Randy Nulman

www.nulman.darkhorizons.org





--- In ap-gto@yahoogroups.com, "Scott Hammonds" shammonds@c...>

wrote: > After a few days of sitting in the unopened boxes I finally got a

chance to > use my new 1200GTO last night. It dwarfed my little 4" refractor

and the > counterweight shaft weighs more than the scope. I do plan to use a

10" SCT, > but last night was a practice night.

>

> Even with my scope, camera, and ST4 the mount was a bit out of

balance. > Total weight on the mount is at maximum 20lbs, probably more like

15lbs. Can > the 1200 handle being a little out of balance and still guide well

at 600mm > fl? Also, is it OK to not even use any weights, but just the

weight of the > counterweight shaft to balance the mount. I assume this is OK, but

have > never even come close to this issue with my 400GTO. Should I add

some weight > just to get it in balance?

>

>

> Thanks,

> Scott Hammonds

>

>

> [Non-text portions of this message have been removed]



----------------------------

#10539 Aug 17, 2004

Thanks Randy. I added a custom 4lb plate for my camera's and mini-

Borg guide scope tonight and this caused me to need the 10lb

counterweight. I'm moving into the big time. g> My ST4 is clicking

away right now while I burn up a little Tech Pan film.



Scott Hammonds



--- In ap-gto@yahoogroups.com, "Randy Nulman" rj.nulman@v...> wrote:

> With the small stuff on the 1200, I doubt the mount will even know

> anything is on it g>

>

> However, it's still always a good idea to have a some counter

> weights so you can adjust and make sure the mount is always

> slightly "east" heavy...this will ensure that the RA gears are

> always in mesh. On heavy loads, Dec balance is important, but I

> think much less an issue in your case.

>

> Randy Nulman

> www.nulman.darkhorizons.org

>

>

> --- In ap-gto@yahoogroups.com, "Scott Hammonds" shammonds@c...>

> wrote:

> > After a few days of sitting in the unopened boxes I finally got

a

> chance to

> > use my new 1200GTO last night. It dwarfed my little 4" refractor

> and the

> > counterweight shaft weighs more than the scope. I do plan to use

a

> 10" SCT,

> > but last night was a practice night.

> >

> > Even with my scope, camera, and ST4 the mount was a bit out of

> balance.

> > Total weight on the mount is at maximum 20lbs, probably more

like

> 15lbs. Can

> > the 1200 handle being a little out of balance and still guide

well

> at 600mm

> > fl? Also, is it OK to not even use any weights, but just the

> weight of the

> > counterweight shaft to balance the mount. I assume this is OK,

but

> have

> > never even come close to this issue with my 400GTO. Should I add

> some weight

> > just to get it in balance?

> >

> >

> > Thanks,

> > Scott Hammonds

> >

> >

> > [Non-text portions of this message have been removed]



----------------------------

#10540 Aug 17, 2004

Thanks Roland. The AP400 needed nearly perfect balance with it

loaded to capacity, I assumed it wouldn't be as critical with the

new 1200. However, it is well balanced now.



Scott Hammonds

--- In ap-gto@yahoogroups.com, chris1011@a... wrote:

> In a message dated 8/17/2004 10:00:05 AM Central Daylight Time,

> shammonds@c... writes:

>

>

> > Even with my scope, camera, and ST4 the mount was a bit out of

balance.

> > Total weight on the mount is at maximum 20lbs, probably more

like 15lbs. Can

> > the 1200 handle being a little out of balance and still guide

well at 600mm

> > fl?

>

> Absolutely. My 1200 mount setup with my 10" Mak-Cass is never in

balance. I

> shoot at 3700mm focal length.

>

> Roland Christen

>

>

> [Non-text portions of this message have been removed]







----------------------------

#10541 Aug 17, 2004

Thanks Roland. The AP400 needed nearly perfect balance with it

loaded to capacity, I assumed it wouldn't be as critical with the

new 1200. However, it is well balanced now.



Scott Hammonds

--- In ap-gto@yahoogroups.com, chris1011@a... wrote:

> In a message dated 8/17/2004 10:00:05 AM Central Daylight Time,

> shammonds@c... writes:

>

>

> > Even with my scope, camera, and ST4 the mount was a bit out of

balance.

> > Total weight on the mount is at maximum 20lbs, probably more

like 15lbs. Can

> > the 1200 handle being a little out of balance and still guide

well at 600mm

> > fl?

>

> Absolutely. My 1200 mount setup with my 10" Mak-Cass is never in

balance. I

> shoot at 3700mm focal length.

>

> Roland Christen

>

>

> [Non-text portions of this message have been removed]


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