Date   

Re: A/P Mount Reset Problems Continue.. Marge.. Help!

Charles Sinsofsky <strfire@...>
 

Contact A/P on this one Todd, hmm seems wierd it should reset so often.
Please call Marj. I am sure something can be looked into.

- charles sinsofsky

----- Original Message -----
From: Todd Gross <toddg@...>
To: <ap-gto@...>
Sent: Thursday, May 18, 2000 5:49 AM
Subject: [ap-gto] A/P Mount Reset Problems Continue.. Marge.. Help!


Okay, I switched cables, but did not do any of that fancy hard-wiring
some were suggesting. My A/P 600 GTO RESET three times in one hour
this morning. The battery was at 13volts when I measured it. Is there
anything I can get directly from A/P to cure this problem, or at least
reduce it w/o having to do some custom work? Is it definitely the
connections or is it possibly internal to the system itself, and it
may need servicing?

Todd Gross






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A/P Mount Reset Problems Continue.. Marge.. Help!

Todd Gross <toddg@...>
 

Okay, I switched cables, but did not do any of that fancy hard-wiring
some were suggesting. My A/P 600 GTO RESET three times in one hour
this morning. The battery was at 13volts when I measured it. Is there
anything I can get directly from A/P to cure this problem, or at least
reduce it w/o having to do some custom work? Is it definitely the
connections or is it possibly internal to the system itself, and it
may need servicing?

Todd Gross


Re: 1200 Coming--Need Advice

Paul Gustafson <drgus@...>
 

I was fortunate to be able to order an AP 1200 mount this year. It
should arrive in the Fall sometime. The folks at Astro-Physics
indicated I should order the appropriate accessories in June.

My first question is; what height portable pier should I buy? I was
thinking 48" or 54". I'm 6ft. tall and would rather lift things than
stoop over.
Are you a stand-up or sit-down astronomer? I'm 6 ft 2 in and have a 155 EDF
on a 900 GTO with a 54" pier. It's a little too tall for viewing near the
horizon, but is OK when viewing near the zenith. The 48" is a better match.

Gus


Re: 1200 Coming--Need Advice

Mark D'Ambrosio <markdambrosio@...>
 

--- In ap-gto@..., "Wilson Beckett" <wwbeckett@e...> wrote:> Hello All,> > I was fortunate to be able to order an AP 1200 mount this year. It > should arrive in the Fall sometime. The folks at Astro-Physics > indicated I should order the appropriate accessories in June.> > My first question is; what height portable pier should I buy? Iwas > thinking 48" or 54". I'm 6ft. tall and would rather lift thingsthan > stoop over.> > I know I will need the DOVELM plate for my C-11 and Tak FS-102scopes > which I now use on a G-11 mount. I hope to upgrade my #1 telescope > before too long, perhaps to an AP155EDF if the gods are smiling. How > much counterweight should I buy? Should I order any other mounting > plate?> > Does this mount come with a polar scope? I can't find mention ofit > on AP's website. A 5x 'integral polar scope' is mentioned as an > accessory on Company Seven's website with no pricing or ordering > information. What's up with the polar scope?> > I would also appreciate any comments about accessory trays, keypad > covers and any other advice.> > Thanks,> > Wilson Beckett Hi Wilson, Iwould venture to say that the 48" pier should be adequate for all 3scopes that you mention. The 54" would probably be more suitable forthe AP 7.1 F-9, and 42" may be a bit short for the refactors youmention. I estimate 1-18lb., and 1-10lb. CW should be adequate for anycombination of the 3 scopes you choose to use (Figuring thepossibility of future acessories such as photgraphic/guide scopesetc.)The Polar scope for these are currently not available, but these dopop up occasionally on Astromart used. (I had luckily found one)If memory serves me correctly, Marj Christen had mentioned not longago, that they are currently in the process of making these scopesonce again available. It's best to keep in touch with AP from timeto time. I like you, await the delievery of a 1200GTO in the fall. It is oneunbelievable mount! Mark


1200 Coming--Need Advice

Wilson Beckett <wwbeckett@...>
 

Hello All,

I was fortunate to be able to order an AP 1200 mount this year. It
should arrive in the Fall sometime. The folks at Astro-Physics
indicated I should order the appropriate accessories in June.

My first question is; what height portable pier should I buy? I was
thinking 48" or 54". I'm 6ft. tall and would rather lift things than
stoop over.

I know I will need the DOVELM plate for my C-11 and Tak FS-102 scopes
which I now use on a G-11 mount. I hope to upgrade my #1 telescope
before too long, perhaps to an AP155EDF if the gods are smiling. How
much counterweight should I buy? Should I order any other mounting
plate?

Does this mount come with a polar scope? I can't find mention of it
on AP's website. A 5x 'integral polar scope' is mentioned as an
accessory on Company Seven's website with no pricing or ordering
information. What's up with the polar scope?

I would also appreciate any comments about accessory trays, keypad
covers and any other advice.

Thanks,

Wilson Beckett


Re: AP600 RA Backlash

 

Chris,
The RA and Dec backlash settings are retained in the memory and are the same
for each session. The amount of backlash can vary depending on load and
orientation of the telescope. RA backlash compensation is there mainly to
prevent the star from "drifting" excessively after reversal of the RA motor
gear train. It takes many seconds for the normal sidereal rate to take up
the motor-gearbox slack before the mount begins tracking again. For that
reason, we added a short pulse of 64x sidereal to get the gearbox to
re-engage quickly. It can never be precisely set, so there will always be a
small delay or small overshoot.

For declination, there is no problem because the dec axis does not "track"
or move after reversal. Normally, dec backlash is adjusted only for manual
guided astrophotography where the scope is always in one orientation for a
long time. Even here, a different adjustment may be needed in different
parts of the sky.
Roland Christen
Astro-Physics

-----Original Message-----
From: Chris Spratt [mailto:cspratt@...]
Sent: Saturday, May 13, 2000 6:28 PM
To: ap-gto@...;
Subject: [ap-gto] AP600 RA Backlash

I've noticed that when I "train" my RA backlash that the number I
chose one night isn't good the next. I thought that once calibrated
the RA backlash number would be retained for each session. Now I have
to reset it each observing session. I'm using version 2.6 of the
software (mount came end of March 2000).

On my mount the range at 12x runs from 4-6 with 5 the median most
nights.

The balance of the 8" OTA and attachments I'm using appears to be
good.


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Re: Playback PEM corrections

 

Chris,
You don't need PEM unless you are doing manually guided astrophotography or
CCD work. There is no other reason to turn it on. You can put the button
rate anywhere. PEM playback is independent of the button rate. While
manually guiding, you would naturally want 1x or slower button rate.
Roland Christen
Astro-Physics

-----Original Message-----
From: Chris Spratt [mailto:cspratt@...]
Sent: Saturday, May 13, 2000 8:15 PM
To: ap-gto@...;
Subject: [ap-gto] Playback PEM corrections

If you "train" the PEM at 1x or .5x what speed should you set the
keypad at when playing back the PEM? I usually have my speed set at
12x and leave it there for the observing once set. Does this setting
compromise the PEM playback?


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Re: Recalibrating object position

 

Chris,
The keypad will not change the RA and Dec co-ordinates of any object in its
data base just because you hit recal. All that happens is you put a new
starting position in the mount memory. All other objects are measured from
this new point. The pointing accuracy will not change with each re-cal. The
inherent accuracy is very high. What affects accuracy primarily is improper
polar alignment and non-orthogonal scope optical axis.

In order for the mount to do what you propose, it would have to distort the
sky map. The computer in the hand controller is not powerful enough nor does
it have enough memory to do that. You would need a program like TPoint and a
full computer to actually accomplish that function.
Roland Christen
Astro-Physics

-----Original Message-----
From: Chris Spratt [mailto:cspratt@...]
Sent: Saturday, May 13, 2000 8:20 PM
To: ap-gto@...;
Subject: [ap-gto] Recalibrating object position

Suppose I set the scope on M3 and hit the "Recal" button and then
move
on to the next object and "tweak" that position with another "Recal".
Does the keypad "remember" each correction and thus improve the
scope's pointing accuracy as each "Recal" is done? Eventually the
scope should be right on if the mount can remember each calibration.


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TPoint

Chris Spratt
 

Anyone used TPoint from Software Bisque to improve their AP Goto
accuracy?

If so what were your results? Worth the money? Effort?


Re: problem with mount resetting...

Tim Khan
 

I've been using the Anderson Single Powerpole Series
PP15 ever since I received my mount (Nov. 98). The
only problem is that the Silver in the Anderson
connectors will tarnish and will have to be cleaned
periodically.

The Singles PP that I use are stackable, the
individual connectors lock togeather to make polarized
plugs, and they can be stacked in an "array" for
multiple power outlets, which is the feature I like.

Tim

--- Paul Gustafson <drgus@...> wrote:
The box they put my old parts in says "Anderson
Power Products, Div. of
Anderson Interconnect, Inc., 13 Pratts Junction
Road, Sterling, MA 01564,
SB-50A Conn #10 Gray, made with V0 material, part
6319G1."

See:

http://www.andersonpower.com/products/multipoles/sbmain.html

It has pictures, heat rise curves, specs, etc. A
high-tech little connector.

Gus


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Re: AP600E GOTO unguided accuracy

RCK <rkuberek@...>
 

At that focal length I get 2 min. unguided about 50% of the time with the
AP600, so your performance sounds consistent with my experience.

However, if I use the autoguider to train the PEC, I can get better.

Bob Kuberek


Chris Spratt wrote:

Just out of curiousity I'm wondering how long others have managed a
typical unguided CCD exposure. I've managed 4 minutes once at F/5.0
but most of the time despite good "drift aligning" I can only get 2
minutes most nights. 90 seconds being the norm. Am I expecting too


AP600E GOTO unguided accuracy

Chris Spratt
 

Just out of curiousity I'm wondering how long others have managed a
typical unguided CCD exposure. I've managed 4 minutes once at F/5.0
but most of the time despite good "drift aligning" I can only get 2
minutes most nights. 90 seconds being the norm. Am I expecting too
much for a portable tripod setup which I take down each night?
The old AP 400 QMD was just as accurate when trying to do CCD work. I
was hoping the 600E would be an improvment.

Training the PEC dosen't seem to help.

I'm using an old C8 and was wondering if "mirror shift" may be the
main culprit.

Comments anyone?


Re: problem with mount resetting...

Paul Gustafson <drgus@...>
 

The box they put my old parts in says "Anderson Power Products, Div. of
Anderson Interconnect, Inc., 13 Pratts Junction Road, Sterling, MA 01564,
SB-50A Conn #10 Gray, made with V0 material, part 6319G1."
See:

http://www.andersonpower.com/products/multipoles/sbmain.html

It has pictures, heat rise curves, specs, etc. A high-tech little connector.

Gus


Re: problem with mount resetting...

Chris Spratt
 

I would check the cigarette "plugin" end as the AP power cord is a bit weak in
this point. The spring-loaded "button" on this end on two of my Ap400 cords went
in and wouldn't come back out. I lost the connection as a result. I took the
cord to a local electronic firm and they installed a more "robust" fused piece
and it even has a small light.

This DC cord in my opinion is the weakest part of the AP mounts. (I had a
similar problem with the DC power cord on my SBIG CCD. Ive gone through 2 in a
year and I'm very, very careful!)

Whatever you do just watch the polarity.

Todd Gross wrote:


My mount is still resetting (A/P 600 GTO) Out of nowhere it just
resets and keeps running, but loses it's whereabouts. I am now using
a different battery (suspecting fluctuating voltage in the old) and
am going to swtich to a new cable tonight. If it keeps happening, is
there a cure short of sending it to a/p ?

thanks

Todd

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Re: problem with mount resetting...

Terry R. Friedrichsen <terry@...>
 

Nice pix. Do the connectors have a tradename?
The box they put my old parts in says "Anderson Power Products, Div. of
Anderson Interconnect, Inc., 13 Pratts Junction Road, Sterling, MA 01564,
These folks are at www.andersonpower.com - searching for "6319" will lead
you to the right catalog page. 6319G1s come in gray or red. The gray ones
are for 10/12 AWG wire, and the red ones are for 6-gauge.

Interestingly, I just ran across these connectors myself (or at least their
twins - they look identical). They are used to connect the battery in the
UPSes I use for my Unix machines.


Terry R. Friedrichsen

terry@...


Re: problem with mount resetting...

Paul Gustafson <drgus@...>
 

Nice pix. Do the connectors have a tradename?
Thanks. New digital camera. :-)

The box they put my old parts in says "Anderson Power Products, Div. of
Anderson Interconnect, Inc., 13 Pratts Junction Road, Sterling, MA 01564,
SB-50A Conn #10 Gray, made with V0 material, part 6319G1."

I am assuming it's the box one of the connectors came in, as it's the right
size.

Gus


Re: problem with mount resetting...

John J. Kasianowicz <surpher@...>
 

Hi Paul,

Nice pix. Do the connectors have a tradename?

Best,
John


Re: problem with mount resetting...

Paul Gustafson <drgus@...>
 

Todd,

My description isn't very clear. I don't have a web page (yet) so I loaded a
few pictures of it into Photopoint. Go to
http://www.photopoint.com/
Visit albums, use my e-mail address ( drgus@... ) and go to the album
"Battery."

Gus

--- In ap-gto@..., "Paul Gustafson" <drgus@e...> wrote:
Another possible problem is the cigarette lighter adapter
connection. Every
alligator clip-to-female-cig-adapter I have seen was very cheaply
made and
doesn't give a positive connection. I took my 32 amp hour battery
to a
custom stereo store and explained the problem. For a reasonable
price, they
ran very heavy gauge wire from the battery terminals to special
snap-lock
connectors, and wired the mating connectors to the ends of my AP
power
cable, Kendrick controller, power inverter. There's absolutely no
way to
screw up, and each connection locks solidly with a positive
audible "snap."

The low quality cig adapter fried my Daystar filter (egads!) and
prompted my
search for a better setup.

Paul..
this may be my problem, I'm not sure, but I have now had too many
glitches using this stupid alligator clips on too many DC items to
ignore it or rule it out. I can't picture exactly what you did, but
I'm wondering if there is an off the shelf solution?

Todd


Re: problem with mount resetting...

Todd Gross <toddg@...>
 

--- In ap-gto@..., "Paul Gustafson" <drgus@e...> wrote:
Another possible problem is the cigarette lighter adapter
connection. Every
alligator clip-to-female-cig-adapter I have seen was very cheaply
made and
doesn't give a positive connection. I took my 32 amp hour battery
to a
custom stereo store and explained the problem. For a reasonable
price, they
ran very heavy gauge wire from the battery terminals to special
snap-lock
connectors, and wired the mating connectors to the ends of my AP
power
cable, Kendrick controller, power inverter. There's absolutely no
way to
screw up, and each connection locks solidly with a positive
audible "snap."

The low quality cig adapter fried my Daystar filter (egads!) and
prompted my
search for a better setup.

Paul..
this may be my problem, I'm not sure, but I have now had too many
glitches using this stupid alligator clips on too many DC items to
ignore it or rule it out. I can't picture exactly what you did, but
I'm wondering if there is an off the shelf solution?

Todd


Re: problem with mount resetting...

Paul Gustafson <drgus@...>
 

Another possible problem is the cigarette lighter adapter connection. Every
alligator clip-to-female-cig-adapter I have seen was very cheaply made and
doesn't give a positive connection. I took my 32 amp hour battery to a
custom stereo store and explained the problem. For a reasonable price, they
ran very heavy gauge wire from the battery terminals to special snap-lock
connectors, and wired the mating connectors to the ends of my AP power
cable, Kendrick controller, power inverter. There's absolutely no way to
screw up, and each connection locks solidly with a positive audible "snap."

The low quality cig adapter fried my Daystar filter (egads!) and prompted my
search for a better setup.

Gus

Todd Wrote:

My mount is still resetting (A/P 600 GTO) Out of nowhere it just
resets and keeps running, but loses it's whereabouts. I am now using
a different battery (suspecting fluctuating voltage in the old) and
am going to swtich to a new cable tonight. If it keeps happening, is
there a cure short of sending it to a/p ?