Date   

Re: Mach1 problem please assist

Roland Christen
 

If you are trying to chase down a problem and think it might be the mount, the best way to approach it is to disconnect every program from the mount and run it without any external inputs. That means no guider connections of any kind. Bring up your guider program and just watch the guidestar motion and take a screen shot.

Rolando

-----Original Message-----
From: DiscoDuck <montagoo@...>
To: main@ap-gto.groups.io
Sent: Sun, Jun 21, 2020 7:49 pm
Subject: Re: [ap-gto] Mach1 problem please assist

Hi Rolando, 
I have been getting similar spikes and was about to re-grease. But this sounds intriguing. Can I ask which log Andrew spotted this move in? I'd like to double check in my case and see if it could be the same issue before chasing mechanical things.
Best regards,
Paul


Re: Mach1 problem please assist

Joe Zeglinski
 

Hi,
 
    Probably highly unlikely, but given everything else you have checked for the cause of the RA lurch, have you checked your counterweight’s lock knobs? If not very tight, perhaps one is very slightly wobbly, shifts or hits the second one, at extreme RA angle changes.
 
Joe


Re: Point Mapping Strategies for the Mobile Imager

Dean Jacobsen
 

I forgot to mention the fact that I am not guiding.
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Point Mapping Strategies for the Mobile Imager

Dean Jacobsen
 

On Sat, Jun 20, 2020 at 09:57 AM, uncarollo2 <chris1011@...> wrote:
You only need 2 dec lines for quite accurate results, maybe 4 - 5 points per line.
 
It is working very nicely.  I actually set up a 3 line point map run with declination spacing of 5 degrees and RA spacing of 11 degrees.  Almost done with the data collection now.  Have taken 100 of 126 images and I haven't seem any subs yet where the stars aren't round.

I am imaging at 318 mm [f/3 with the  FSQ-106] so perhaps this isn't a super difficult test of the capabilities of the mount and the software.  However, I am impressed. 
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach1 problem please assist

fd@...
 

On Thu, Jun 18, 2020 at 02:42 PM, Ron Kramer wrote:
I'll attach at ORIGINAL SIZE
I can't read any text on your pic.  You can post the pic on IMGUR and link to it here.

I have a similar problem - not an exactly repeating lurch, but often enough to be annoying.  I got my grease kit this week, will clean and regrease my mount tomorrow.

Here is a video about greasing the 1200GTO.  Not the same mount we have, but it give you and idea of what is inside the machine.
 
--
Mach1GTO and GTOCP4 on permanent pier


Re: Mach1 problem please assist

DiscoDuck
 

Hi Rolando, 
I have been getting similar spikes and was about to re-grease. But this sounds intriguing. Can I ask which log Andrew spotted this move in? I'd like to double check in my case and see if it could be the same issue before chasing mechanical things.
Best regards,
Paul


Re: A question about a AP155 EDFS with the 2.7" focuser

Dean Jacobsen
 

Thanks Andrew.  I am keeping my fingers crossed that we don’t need the flattener but that is good to know if we do.
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Do-it-yourself battery replacement in 'new' keypad vs have AP do it ? (Cost ?)

Robert Berta
 

Download the instructions....basically there are two battery types based on your controller serial number. One is a direct replacement....the newer one has pig tails. The newer model ensures a better connection so a drop of the hand controller won't result in a disconnect.

I have changed mine twice and the clubs once (both with the newer battery.) It isn't hard to do although follow the instructions. Main thing to watch out for is the fiber optic wires....be careful that you don't pinch them when reassembling. If you are at all nervous about this or all thumbs, you may want to send to AP and have them do it.I change mine after every 5 years....could probably go longer but why push your luck. A dead controller will ruin your trip to a star party....although you can always run the mount directly from a computer without the HC connected.


Re: What is the diameter and thread on the Pasil.4 polar scope?

Christopher Erickson
 

I believe the AP side is English and the polar scope itself is metric and the AP bushing adapter is metric on the polar scope side and English on the mount side.

So all you will need to do is English threads to make a threaded plug for the mount. For a plug I would use Delrin plastic (easy to machine). For a plug, the threads don't need to be precise or tight. They can fit a bit loosely and still work just fine.


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   


On Sun, Jun 21, 2020, 9:23 AM Tom Blahovici <tom.va2fsq@...> wrote:
Hmm, since the mount comes from 2004 or so. I highly doubt that it is metric. So I have ordered a new gauge which has both and more measurement options 
Tom


Re: A question about a AP155 EDFS with the 2.7" focuser

Andrew Arai
 

Dean,

I have been looking into the spacing of some of the older AP field flatteners. Many were configured for the Pentax 6x7 system. IN that case 86.5 mm is close to the 86.4 +/- 2.5 mm I thought was the correct spacing. I found this on an old thread that was forward from the Yahoo group into the AP User group).

Andrew


Re: What is the diameter and thread on the Pasil.4 polar scope?

Tom Blahovici
 

Hmm, since the mount comes from 2004 or so. I highly doubt that it is metric. So I have ordered a new gauge which has both and more measurement options 
Tom


Re: A question about a AP155 EDFS with the 2.7" focuser

Dean Jacobsen
 

On Sun, Jun 21, 2020 at 09:49 AM, Geert wrote:
I would prefer using the Moon to find the focal point, unless you want to set fire on a piece of paper :-)
 
Geert
Hey Geert, sometimes ya' just gotta live dangerously.  ;-)

Thanks Roland, I can work with that. 

--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 power consumption #Mach2GTO

Worsel
 

"Could be more if the load is unbalanced and the mount has to work against the unbalance."


If I use my Powerwerx meter to measure the watts (more precision than amps) in moving E to W versus W to E and N to S versus S to N, how small should the difference in watts be for a suitable balance in each axis? 

Does the difference vary among mounts?  I have an 1100 (non-AE).

Bryan


Re: Mach2 power consumption #Mach2GTO

Roland Christen
 


So, what is the PEAK draw of the MACH 2 while in use AND if something goes wrong?  
The power supply is rated at 10 amps. The peak current draw at high slew rates (1800x) and both axes slewing can be as much as 5 amps. Could be more if the load is unbalanced and the mount has to work against the unbalance.

Powering other stuff can put spikes in the DC, so it's not a good idea to split the power from the mount supply to power things like dew heaters.

Rolando


-----Original Message-----
From: Rick Socarras <tgrick@...>
To: main@ap-gto.groups.io
Sent: Sun, Jun 21, 2020 8:37 am
Subject: Re: [ap-gto] Mach2 power consumption #Mach2GTO

Happy Fathers Day to Astro-Dads!

The Mach 2 AC/DC Power Supply terminates to  an Anderson Power Pole connector.  That Anderson Power Pole connector DOES NOT attach to the mount in ANY way.  Astro-Physics then provides an EXTENSION cable.  That extension cable then connects to the ANDERSON POWER POLE connection on one end.  At the END of that extension cable is the FEMALE HIROSE connector that connects to the CP5 control box.

I was following this question because my interest is creating a Y POWER POLE SPLITTER.  The idea is I would SPLIT the power to the Mach 2 AND then SPLIT the power to a STEP down transformer (24V to 12V)  for camera equipment.  I know I can do this I just was not sure of the PEAK amperage draw of the Mach 2?  So, what is the PEAK draw of the MACH 2 while in use AND if something goes wrong?  

Rick


Re: A question about a AP155 EDFS with the 2.7" focuser

Geert
 

I would prefer using the Moon to find the focal point, unless you want to set fire on a piece of paper :-)

Geert

Op zo 21 jun. 2020 om 18:42 schreef uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io>:

Aim it at the sun, then place a piece of white paper at the focus point and measure where it comes to focus. Should be somewhere around 8" from the fully racked in focuser back.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 9:32 pm
Subject: Re: [ap-gto] A question about a AP155 EDFS with the 2.7" focuser

I guess I could guesstimate the focal point by measuring 43” back from the front of the objective and then measuring how far it is from that point to the focuser barrel.
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: A question about a AP155 EDFS with the 2.7" focuser

Roland Christen
 

Aim it at the sun, then place a piece of white paper at the focus point and measure where it comes to focus. Should be somewhere around 8" from the fully racked in focuser back.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 9:32 pm
Subject: Re: [ap-gto] A question about a AP155 EDFS with the 2.7" focuser

I guess I could guesstimate the focal point by measuring 43” back from the front of the objective and then measuring how far it is from that point to the focuser barrel.
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: What is the diameter and thread on the Pasil.4 polar scope?

Robert Berta
 

I agree that practicing with your lathe will open a world of things you will be able to accomplish. I decided to get my lathe when I was quoted a very high cost to make a lens cell for a Zeiss flat field lens for my 6" APO refractor. I probably put as much into the lathe as what it would have cost me for the custom part but than had a tool for future projects. That was about 15 years ago and I figure I have saved many times over custom building one off projects for astrophotography and race cars since than....for myself and friends. Luckily I already knew how to use the lathe and milling machines from my original high school and college classes where I was going to be an industrial arts teacher. That never happened as I became an electrical engineer....but those were valuable skills I learned. I consider that lathe to be my most valuable tool....it gets used a lot!


Re: Mach2 power consumption #Mach2GTO

Rick Socarras
 

Happy Fathers Day to Astro-Dads!

The Mach 2 AC/DC Power Supply terminates to  an Anderson Power Pole connector.  That Anderson Power Pole connector DOES NOT attach to the mount in ANY way.  Astro-Physics then provides an EXTENSION cable.  That extension cable then connects to the ANDERSON POWER POLE connection on one end.  At the END of that extension cable is the FEMALE HIROSE connector that connects to the CP5 control box.

I was following this question because my interest is creating a Y POWER POLE SPLITTER.  The idea is I would SPLIT the power to the Mach 2 AND then SPLIT the power to a STEP down transformer (24V to 12V)  for camera equipment.  I know I can do this I just was not sure of the PEAK amperage draw of the Mach 2?  So, what is the PEAK draw of the MACH 2 while in use AND if something goes wrong?  

Rick


Re: Do-it-yourself battery replacement in 'new' keypad vs have AP do it ? (Cost ?)

Michael Hamburg
 

Just replaced the battery of the hand of my AP900. Be careful; work slowly; be alert and it's simple.

;

On Sat, Jun 20, 2020 at 2:01 PM, uncarollo2
<chris1011@...> wrote:e
Call AP and they will tell you, depending on which keypad you have.

Rolando



-----Original Message-----
From: Mike Dodd <mike@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 12:31 pm
Subject: Re: [ap-gto] Do-it-yourself battery replacement in 'new' keypad vs have AP do it ? (Cost ?)

On 6/20/2020 1:17 PM, uncarollo2 <chris1011@...> via groups.io wrote:
> The batteries can be purchased from us, and they have the connector
> attached, so all you do is unplug the old battery and plug in the new one.

Cost? (Asked in the subject line.)

--- Mike






Re: Mach2 power consumption #Mach2GTO

Terri Zittritsch
 

On Sat, Jun 20, 2020 at 06:19 PM, uncarollo2 <chris1011@...> wrote:
The Mach2 power supply does not use Anderson power poles. It uses Hirose connectors. This 24 volt supply should never be used to power anything else, no matter how tempting. It is ONLY to be used to power the Mach2, nothing else.
 
Roland
 
Roland, is this a recent change?   Best I can tell the connector on the 24V supply I have is powerpole.    If not powerpole, it is a copy, and since this plugs into the power cord on the CP5, which also plugs into my battery box which I put powerpole on, I'm not clear what you're referring to.     


Terri



Terri

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