Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Mounts

Pages: 1
Bart
Carpal Tunnel
*****

Reged: 05/28/06

Loc: Somewhere near Charlottesville...
Longer counterweight bar or more counterweights.
      #4557204 - 05/02/11 01:40 PM

Should I lengthen the counterweight bar or add more counterweights. What are the pros and cons?

Anyone know where I can get reasonably priced counterweights?

Thanks


Post Extras: Print Post   Remind Me!   Notify Moderator  
Midnight Dan
Postmaster
*****

Reged: 01/23/08

Loc: Hilton, NY, Yellow Zone (Bortl...
Re: Longer counterweight bar or more counterweights. new [Re: Bart]
      #4557225 - 05/02/11 01:53 PM

The mounts are rated at a certain maximum load - which is usually in addition to the included counterweights. So if you add counterweights, you'll have less of your weight budget left for your payload. So to me, a longer counterweight bar seems like the right way to go.

I'm no expert, but that's my 2 cents.
-Dan


Post Extras: Print Post   Remind Me!   Notify Moderator  
skywolf856
sage


Reged: 01/25/08

Loc: SE Michigan
Re: Longer counterweight bar or more counterweights. new [Re: Midnight Dan]
      #4557815 - 05/02/11 07:47 PM

The total weight of the c'weights used do not in any way add into the payload limits of the mount. For example on the CG5, theoretically you could have a 35 lb. telescope using 35 lbs of counterweights to balance at the maximum payload.
To answer the OP's first question, a longer bar would allow you to use your existing weights more efficiently, but you need to be aware of any mount swing clearances that may come into play with extreme positions.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mary B
Vendor - Echo Astronomy and Electronics
*****

Reged: 05/21/10

Loc: Minnesota
Re: Longer counterweight bar or more counterweights. new [Re: skywolf856]
      #4558300 - 05/03/11 01:11 AM

I would think vibration could creep in with a longer shaft.

Post Extras: Print Post   Remind Me!   Notify Moderator  
DaveJ
Carpal Tunnel
*****

Reged: 01/07/05

Loc: NE Ohio
Re: Longer counterweight bar or more counterweights. new [Re: Mary B]
      #4558603 - 05/03/11 09:04 AM

Quote:

I would think vibration could creep in with a longer shaft.




You're right, Mary; it does. I've tested this with my G11 (when I had it), my CGE and my LXD650. In all tests, I balanced perfectly with one weight at the extreme end of the counterweight shaft and then tested damping time at high power following a light tap on the focuser. I then balanced perfectly using two weights considerably closer to the fulcrum and tested again. With all three mounts, the damping time was noticeably less with two weights closer to the mount head. As far as I'm concerned, that proved the point for me. I'm now stuck with carrying more counterweights.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bart
Carpal Tunnel
*****

Reged: 05/28/06

Loc: Somewhere near Charlottesville...
Re: Longer counterweight bar or more counterweights. new [Re: DaveJ]
      #4558697 - 05/03/11 09:54 AM

Until I decide on which new mount I'll be purchasing, I'm going with the extension. It's cheaper than buying additional weights for a mount that I might not have for much longer.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
20 registered and 34 anonymous users are browsing this forum.

Moderator:  Dave M, richard7, bilgebay 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 760

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics