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Re: Polar Adjustment controls


Aug 1, 2011

 


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

#49309 Aug 1, 2011

Hi,



When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.



Thanks,

-Joe



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

#49310 Aug 1, 2011

I just finished getting within 2 arcminutes of the pole. I used an image with 4 binning, and 1 sec image. I measured the error on the sky x using the measurement tool. Then, using the real image I just winged it until the star moved the estimated eyeball distance in the image.

After a second run of tpoint and a second much smaller correction with that much experience, I satisfied tpoint "acceptable" alignment.

There are no notches on the Losmandy so alternatives must be invented. I will now probably hear of a better way and all to the good of the group.

Marlin Costello

--- In Losmandy_users@yahoogroups.com, "Joe Ulowetz" joe.ulowetz@...> wrote:

>

> Hi,

>

> When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.

>

> Thanks,

> -Joe

>



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

#49312 Aug 2, 2011

I just use Gemini's PAC function which is good for 2 arcmins (so the

manual states) very quick and easy, and can be used with a CCD or eyepiece.



Badger

On 01/08/2011 19:29, Joe Ulowetz wrote:

> Hi Marlin,

>

> That's a very interesting technique. I hadn't thought of approaching it that way, but it makes sense. I'll have to give it a try.

>

> Thanks!

> -Joe

>

> --- In Losmandy_users@yahoogroups.com, "Marlin"marlincostello@...> wrote:

>> I just finished getting within 2 arcminutes of the pole. I used an image with 4 binning, and 1 sec image. I measured the error on the sky x using the measurement tool. Then, using the real image I just winged it until the star moved the estimated eyeball distance in the image.

>> After a second run of tpoint and a second much smaller correction with that much experience, I satisfied tpoint "acceptable" alignment.

>> There are no notches on the Losmandy so alternatives must be invented. I will now probably hear of a better way and all to the good of the group.

>> Marlin Costello

>>

>> --- In Losmandy_users@yahoogroups.com, "Joe Ulowetz"joe.ulowetz@> wrote:

>>> Hi,

>>>

>>> When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.

>>>

>>> Thanks,

>>> -Joe

>>>

>

>



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

#49313 Aug 2, 2011

Hi Badger,



I wish I could do that, but I have an unusual problem: the Menu button doesn't work on my Gemini. I've traced the signal and it gets all the way to the Gemini circuit board connector so I know it isn't the hand controller or the cable. (And I've changed the battery several times, and used different version EPROMS, and even sent the hand control in to Losmandy at first but they said it was fine.)



Most of the time I can live with this because I use my laptop to control my scope, but this is one of the times that the built-in Gemini functionality would be helpful.



I tried using the hand control emulation in GCC the other night, starting with PAA because I was no where near the pole, but GCC wouldn't exit the PAA loop. I eventually gave up and just drift-aligned.



I might give GCC another try for PAC; thanks for the reminder. That might help me get close enough to the pole so I don't get image rotation, if PAC works through GCC.



Thanks,

-Joe

--- In Losmandy_users@yahoogroups.com, David Mercer david.mercer@...> wrote:

>

> I just use Gemini's PAC function which is good for 2 arcmins (so the

> manual states) very quick and easy, and can be used with a CCD or eyepiece.

>

> Badger

>

> On 01/08/2011 19:29, Joe Ulowetz wrote:

> > Hi Marlin,

> >

> > That's a very interesting technique. I hadn't thought of approaching it that way, but it makes sense. I'll have to give it a try.

> >

> > Thanks!

> > -Joe

> >

> > --- In Losmandy_users@yahoogroups.com, "Marlin"marlincostello@> wrote:

> >> I just finished getting within 2 arcminutes of the pole. I used an image with 4 binning, and 1 sec image. I measured the error on the sky x using the measurement tool. Then, using the real image I just winged it until the star moved the estimated eyeball distance in the image.

> >> After a second run of tpoint and a second much smaller correction with that much experience, I satisfied tpoint "acceptable" alignment.

> >> There are no notches on the Losmandy so alternatives must be invented. I will now probably hear of a better way and all to the good of the group.

> >> Marlin Costello

> >>

> >> --- In Losmandy_users@yahoogroups.com, "Joe Ulowetz"joe.ulowetz@> wrote:

> >>> Hi,

> >>>

> >>> When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.

> >>>

> >>> Thanks,

> >>> -Joe

> >>>

> >

> >

>







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

#49314 Aug 2, 2011

Joe



I fitted a modified pre deluxe handpad to mine (long story) and had to

use a pad from where the original menu button was fitted to the board to

get this feature to work, I will email you off group about it as this

may provide a workaround for you.



Badger

On 02/08/2011 15:05, Joe Ulowetz wrote:

> Hi Badger,

>

> I wish I could do that, but I have an unusual problem: the Menu button doesn't work on my Gemini. I've traced the signal and it gets all the way to the Gemini circuit board connector so I know it isn't the hand controller or the cable. (And I've changed the battery several times, and used different version EPROMS, and even sent the hand control in to Losmandy at first but they said it was fine.)

>

> Most of the time I can live with this because I use my laptop to control my scope, but this is one of the times that the built-in Gemini functionality would be helpful.

>

> I tried using the hand control emulation in GCC the other night, starting with PAA because I was no where near the pole, but GCC wouldn't exit the PAA loop. I eventually gave up and just drift-aligned.

>

> I might give GCC another try for PAC; thanks for the reminder. That might help me get close enough to the pole so I don't get image rotation, if PAC works through GCC.

>

> Thanks,

> -Joe

>

> --- In Losmandy_users@yahoogroups.com, David Mercerdavid.mercer@...> wrote:

>> I just use Gemini's PAC function which is good for 2 arcmins (so the

>> manual states) very quick and easy, and can be used with a CCD or eyepiece.

>>

>> Badger

>>

>> On 01/08/2011 19:29, Joe Ulowetz wrote:

>>> Hi Marlin,

>>>

>>> That's a very interesting technique. I hadn't thought of approaching it that way, but it makes sense. I'll have to give it a try.

>>>

>>> Thanks!

>>> -Joe

>>>

>>> --- In Losmandy_users@yahoogroups.com, "Marlin"marlincostello@> wrote:

>>>> I just finished getting within 2 arcminutes of the pole. I used an image with 4 binning, and 1 sec image. I measured the error on the sky x using the measurement tool. Then, using the real image I just winged it until the star moved the estimated eyeball distance in the image.

>>>> After a second run of tpoint and a second much smaller correction with that much experience, I satisfied tpoint "acceptable" alignment.

>>>> There are no notches on the Losmandy so alternatives must be invented. I will now probably hear of a better way and all to the good of the group...

>>>> Marlin Costello

>>>>

>>>> --- In Losmandy_users@yahoogroups.com, "Joe Ulowetz"joe.ulowetz@> wrote:

>>>>> Hi,

>>>>>

>>>>> When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.

>>>>>

>>>>> Thanks,

>>>>> -Joe

>>>>>

>>>

>

>



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

#49334 Aug 5, 2011

Joe - Each revolution of the Altitude knob adjusts the mount by 3.2., and each revolution of the Azimuth knobs adjusts the mount by 0.82..





Additionally, since talk seems to have veered onto discussing programs for polar alignment, I'd like to throw out a recommendation for EQAlign. Download link: sourceforge.net/projects/eqalign/files/EQAlign%202.3/EQAlign-2_3_7.exe/download



EQAlign will track drift, then place an overlay on the display from your guide camera, showing you where to place the guidestar with the hand controller, then instruct you to adjust Alt/Az until it reaches the correction point. It takes about 20 minutes to get a very good alignment, and takes all the guesswork out of it.



The author's website with an excellent primer is here: eqalign.net/e_eqalign.html

--- In Losmandy_users@yahoogroups.com, "Joe Ulowetz" joe.ulowetz@...> wrote:

>

> Hi,

>

> When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.

>

> Thanks,

> -Joe

>



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

#49335 Aug 5, 2011

Thanks very much for the info, and especially for pointing me to EQAlign; I wasn't aware of it. I've downloaded it and I'll try it out.



Thanks again,

-Joe

--- In Losmandy_users@yahoogroups.com, "stellarfoundry" aw.fsmain@...> wrote:

>

> Joe - Each revolution of the Altitude knob adjusts the mount by 3.2., and each revolution of the Azimuth knobs adjusts the mount by 0.82..

>

>

> Additionally, since talk seems to have veered onto discussing programs for polar alignment, I'd like to throw out a recommendation for EQAlign. Download link: sourceforge.net/projects/eqalign/files/EQAlign%202.3/EQAlign-2_3_7.exe/download

>

> EQAlign will track drift, then place an overlay on the display from your guide camera, showing you where to place the guidestar with the hand controller, then instruct you to adjust Alt/Az until it reaches the correction point. It takes about 20 minutes to get a very good alignment, and takes all the guesswork out of it.

>

> The author's website with an excellent primer is here: eqalign.net/e_eqalign.html

>

> --- In Losmandy_users@yahoogroups.com, "Joe Ulowetz" joe.ulowetz@> wrote:

> >

> > Hi,

> >

> > When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.

> >

> > Thanks,

> > -Joe

> >

>







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

#49338 Aug 6, 2011

PoleAlignMax is another nice program for polar aligning. It doesn't rely on drift and is actually pretty fast! Only downside is that it relies on maxim which is spendy.



users.bsdwebsolutions.com/~larryweber/PoleAlignMaxDownload.htm



Also PemPro has a drift alignment method in it which is very easy to follow.



Jared

--- In Losmandy_users@yahoogroups.com, "Joe Ulowetz" joe.ulowetz@...> wrote:

>

> Thanks very much for the info, and especially for pointing me to EQAlign; I wasn't aware of it. I've downloaded it and I'll try it out.

>

> Thanks again,

> -Joe

>

> --- In Losmandy_users@yahoogroups.com, "stellarfoundry" aw.fsmain@> wrote:

> >

> > Joe - Each revolution of the Altitude knob adjusts the mount by 3.2., and each revolution of the Azimuth knobs adjusts the mount by 0.82..

> >

> >

> > Additionally, since talk seems to have veered onto discussing programs for polar alignment, I'd like to throw out a recommendation for EQAlign. Download link: sourceforge.net/projects/eqalign/files/EQAlign%202.3/EQAlign-2_3_7.exe/download

> >

> > EQAlign will track drift, then place an overlay on the display from your guide camera, showing you where to place the guidestar with the hand controller, then instruct you to adjust Alt/Az until it reaches the correction point. It takes about 20 minutes to get a very good alignment, and takes all the guesswork out of it.

> >

> > The author's website with an excellent primer is here: eqalign.net/e_eqalign.html

> >

> > --- In Losmandy_users@yahoogroups.com, "Joe Ulowetz" joe.ulowetz@> wrote:

> > >

> > > Hi,

> > >

> > > When using the Altitude and Azimuth adjustment knobs on a G-11, does anyone know how much one turn of each knob relates to motion in the sky? For example, when I build my Gemini model and it says I'm 15 arcmin east, if I knew what knob movement that required it should help me align faster.

> > >

> > > Thanks,

> > > -Joe

> > >

> >

>



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