Re: DEC Balancing


Shailendra Sharma <sshailendrasharma@...>
 

Here is an image of what my guiding nor.ally looks alike after a while.
Image

Thanks
Exos 2 gt pmc-8
Skywatcher 102t
Svbony 50mm
Canon 600d
Zwo asi 120mm mc-s



From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> on behalf of Shailendra Sharma <sshailendrasharma@...>
Sent: Tuesday, August 11, 2020 5:07:39 PM
To: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io>
Subject: Re: [ESPMC-Eight] DEC Balancing
 
Yes stars are round.  Heres one stacked image very little editing. 

Image



From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> on behalf of Dan Kahraman <dkahra213@...>
Sent: Tuesday, August 11, 2020 5:00:58 PM
To: MAIN@espmc-eight.groups.io <MAIN@espmc-eight.groups.io>
Subject: Re: [ESPMC-Eight] DEC Balancing
 
Hi Robert:

Exactly! Small mounts cannot internalize the location of their declination motor housing so this creates an imbalance issue the fact that they are small structures to begin with enhances the impact. A suggestion at balancing, applicable to Newtonian scopes, is to rotate the tube so that the focuser/imaging camera and the guide-scope/guide-camera are at the bottom centred along the longitudinal axis of the tube...the "sweet spot" may be with the focuser closer to the axis than the finder scope yet both straddling it on either side.

Dan Kahraman

On Tue, 11 Aug 2020 at 11:39, Robert Hoskin <devonshire@...> wrote:
Yes, you won't be able to overcome that lopsided DEC motor's weight. Rotate your guidescope to one side of your imaging scope, and you just change the point at which your balance goes off, because their weights and weight distribution won't match..  
 
Your guide stats are a useful troubleshooting tool, but the goal is round stars in your images.  If you've got that, for the exposure length you require, you've done the job.  Perhaps you might tweak a bit more in hopes of tightening them, but round is round.
 
--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64

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