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

Rick Socarras

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

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

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

R Botero

My 1963 Colchester Student lathe cuts both metric and imperial threads but most lathes of that age did not come equipped with such gearboxes. Modern lathes should cut mostly metric threads unless specifically ordered as imperial (which I assume will be the case for US customers). As Robert says, there are tricks to cut metric on imperial and viceversa. It’s all part of the learning curve if you are learning to machine on the lathe. You can use additional reduction gears - changewheels -on the back of the machine. For an old (1954) Boxford I had (identical to a Southbend), a single conversion gear on the back would allow me to turn 90% of metric threads with an 8tpi lead screw.
See lathes.co.uk - the bible of all things to do with machining - for historic references and specifics about accessories.
I feel you don’t need the adapter for your Pasil right away, try to make one! Turning on a lathe or milling is an addictive a hobby as visual/imaging amateur astronomy.
If you are in desperate need of one, you can always click a button and buy it...
Roberto

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

Robert Berta

Jumping in here.....I also have a larger metal lathe, milling machine, etc.in my home shop.  Your mini lathe is setup for ASA screw sizes and it does this with  a lead screw that allows the appropriate settings for those type of screws which are spec'd by TPI.. Cutting Metric threads can't simply be done on a mini lathe without some fiddling around and cheating. Either changing out gear ratios and/or changing to a metric lead screw is required which I doubt your mini lathe has that option. Repeating to get deeper cuts using the threading dial also won't work for metric as it isn't calibrated or sync'd for those type of metric screw pitches. There are ways to cheat to get it close but takes a lot of experience to get it right. Cheating also won't give the precision you need to make this project work.

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

Dean Jacobsen

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?

Christopher Erickson

However the various adapters that AP makes adapt the Kenko polar scope to the English threaded holes on various AP mounts. They make more than one bushing adapter. I don't know which one you have.

On Sat, Jun 20, 2020 at 4:02 PM Christopher Erickson <christopher.k.erickson@...> wrote:
The PASILL polar scopes are made by Kenko in Japan. Yes, metric threads.

On Sat, Jun 20, 2020 at 3:43 PM Tom Blahovici <tom.va2fsq@...> wrote:
Hi
Well it turns out that the diameter of the threads is very different than the Passil4 on the 900.  Which is strange...The diameter of the threaded part is 1.016 inches and the threading is not 24tpi.  My thread gauge goes from 32 then to 40 tpi and it is somewhere in the middle of that.  So I assume it is metric.
This is the losmandy polar scope which I believe comes from China and then adapted by AP.
So I guess I will need a metric thread gauge.
Tom

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

Christopher Erickson

The PASILL polar scopes are made by Kenko in Japan. Yes, metric threads.

On Sat, Jun 20, 2020 at 3:43 PM Tom Blahovici <tom.va2fsq@...> wrote:
Hi
Well it turns out that the diameter of the threads is very different than the Passil4 on the 900.  Which is strange...The diameter of the threaded part is 1.016 inches and the threading is not 24tpi.  My thread gauge goes from 32 then to 40 tpi and it is somewhere in the middle of that.  So I assume it is metric.
This is the losmandy polar scope which I believe comes from China and then adapted by AP.
So I guess I will need a metric thread gauge.
Tom

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

Tom Blahovici

Hi
Well it turns out that the diameter of the threads is very different than the Passil4 on the 900.  Which is strange...The diameter of the threaded part is 1.016 inches and the threading is not 24tpi.  My thread gauge goes from 32 then to 40 tpi and it is somewhere in the middle of that.  So I assume it is metric.
This is the losmandy polar scope which I believe comes from China and then adapted by AP.
So I guess I will need a metric thread gauge.
Tom

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

Dean Jacobsen

Thanks Stuart.  Sounds good.

I figure that having the camera in focus with the focuser barrel about 1” extended would be a good place to be.  So I was hoping to avoid that situation I am sure we have all been in where I am scrounging around for adapters in the dark trying to get a good spacing.
--
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

Stuart <stuart.j.heggie@...>

Dean, without a rear element in the imaging train, I think you can put the darn thing wherever you want and just bring it to focus. If you have a FF or Reducer/Flattener in play, they only deliver their promise at the precise distance to the chip. No flattener, no issue. Pretty sure.

Stuart Heggie (who has an AP155EDF w FF and 155TCC)

On Sat, 20 Jun 2020 at 19:58, Dean Jacobsen <deanjacobsen@...> wrote:
OK, now I am hearing from the scope's owner that the 86.5 number is the spacing for the flatener - which I do not anticipate that we will need with a 4/3" sized detector (the same size as a 8300 CCD).

How far back should I set the camera detector from the back of the focuser barrel to be able to have some reasonable in and out travel of the focuser?
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/

--

Stuart
http://www.astrofoto.ca/stuartheggie/

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

Dean Jacobsen

OK, now I am hearing from the scope's owner that the 86.5 number is the spacing for the flatener - which I do not anticipate that we will need with a 4/3" sized detector (the same size as a 8300 CCD).

How far back should I set the camera detector from the back of the focuser barrel to be able to have some reasonable in and out travel of the focuser?
--
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

Roland Christen

The DC connector on the CP5 is a round 2 pin Hirose connector. You received a power supply cord with Hirose connector on one end and power poles on the other. The 24 volt AC-DC supply that came with the mount plugs right into that power cable, and yes it does so using the Anderson power poles. However, the Anderson power poles DO NOT connect to the CP5.

Please do not use that power supply to power anything else while plugged into the Mach2 CP5 controller. It is 24 volts and can fry your other electronic devices.

We supplied you with the power cord that has one end with Anderson power pole connectors so that you have the option of using your CP5 with other power supplies including batteries in the field where the AC-DC power supply would not be useful. You can use any 12 to 24 volt DC battery supply to operate your mount in the field. We did these connectors that way so that you have flexibility.

Rolando

-----Original Message-----
From: Jerome Allison <jallison@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 6:20 pm
Subject: Re: [ap-gto] Mach2 power consumption #Mach2GTO

Thanks for everyone's suggestions, but humbly I have no idea what a Hirose connector is, and can't find them.  The connector on my 24V supply that came with the Mach2 seems to be a standard red/black Anderson PowerPole.  I think maybe the GTOCP5 uses a Hirose connector, and the included power cable transistions to Anderson?

I actually got a "Daygreen" 12 to 24 VDC converter long before for the mount.  I followed their color code, using red/black powerpole connectors for 12VDC in and yellow/black for 24VDC out so I wouldn't confuse voltages.  (I also use gray/orange to code my solar connections.)  I haven't tested it yet, and don't know if there's really any reason for using it when I'm away from line power and am on batteries.

What are your thoughts on a 12 to 24 DC-DC converter for the mount?  Probably minimal benefits along with voltage conversion power loss, and thus no real gain?

Jerome

Re: Mach2 power consumption

Thanks for everyone's suggestions, but humbly I have no idea what a Hirose connector is, and can't find them.  The connector on my 24V supply that came with the Mach2 seems to be a standard red/black Anderson PowerPole.  I think maybe the GTOCP5 uses a Hirose connector, and the included power cable transistions to Anderson?

I actually got a "Daygreen" 12 to 24 VDC converter long before for the mount.  I followed their color code, using red/black powerpole connectors for 12VDC in and yellow/black for 24VDC out so I wouldn't confuse voltages.  (I also use gray/orange to code my solar connections.)  I haven't tested it yet, and don't know if there's really any reason for using it when I'm away from line power and am on batteries.

What are your thoughts on a 12 to 24 DC-DC converter for the mount?  Probably minimal benefits along with voltage conversion power loss, and thus no real gain?

Jerome

Re: Mach2 power consumption

Roland Christen

Best not to cut the 12 or 24 volt cords because DC at that power level loses voltage for every meter of length added. Best to use an extension cord on the AC side where you can go 100 meters without losing a millivolt of voltage at the DC output.
Betcha most people didn't know that ;^))

Rolando

-----Original Message-----
From: Christopher Erickson <christopher.k.erickson@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 5:22 pm
Subject: Re: [ap-gto] Mach2 power consumption #Mach2GTO

My concern is if people cut their power cords to extend them over greater distances to just make sure they don't set themselves up for future problems.

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

On Sat, Jun 20, 2020, 12:19 PM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> 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

-----Original Message-----
From: Christopher Erickson <christopher.k.erickson@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 4:26 pm
Subject: Re: [ap-gto] Mach2 power consumption #Mach2GTO

And MAKE SURE that you use a different style of connectors for the 24V power supply and 12V supply. You don't want to connect 24V to your precious camera or other 12V devices.

Anderson makes powerpole connectors in different sizes, for example. Prevent mixups.

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

On Sat, Jun 20, 2020, 7:01 AM Jerome Allison <jallison@...> wrote:
[Edited Message Follows]
Thanks, David and Rolando.
I will get the simpler Powerwerx supply when it's back in stock, and use the 24 volt supply for the mount in the meantime.
Jerome
P.S. The mount worked perfectly - I really love it, Roland. Great stuff.

Re: Mach2 power consumption

Christopher Erickson

My concern is if people cut their power cords to extend them over greater distances to just make sure they don't set themselves up for future problems.

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

On Sat, Jun 20, 2020, 12:19 PM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> 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

-----Original Message-----
From: Christopher Erickson <christopher.k.erickson@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 4:26 pm
Subject: Re: [ap-gto] Mach2 power consumption #Mach2GTO

And MAKE SURE that you use a different style of connectors for the 24V power supply and 12V supply. You don't want to connect 24V to your precious camera or other 12V devices.

Anderson makes powerpole connectors in different sizes, for example. Prevent mixups.

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

On Sat, Jun 20, 2020, 7:01 AM Jerome Allison <jallison@...> wrote:
[Edited Message Follows]
Thanks, David and Rolando.
I will get the simpler Powerwerx supply when it's back in stock, and use the 24 volt supply for the mount in the meantime.
Jerome
P.S. The mount worked perfectly - I really love it, Roland. Great stuff.

Re: Mach2 power consumption

Roland Christen

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

-----Original Message-----
From: Christopher Erickson <christopher.k.erickson@...>
To: main@ap-gto.groups.io
Sent: Sat, Jun 20, 2020 4:26 pm
Subject: Re: [ap-gto] Mach2 power consumption #Mach2GTO

And MAKE SURE that you use a different style of connectors for the 24V power supply and 12V supply. You don't want to connect 24V to your precious camera or other 12V devices.

Anderson makes powerpole connectors in different sizes, for example. Prevent mixups.

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

On Sat, Jun 20, 2020, 7:01 AM Jerome Allison <jallison@...> wrote:
[Edited Message Follows]
Thanks, David and Rolando.
I will get the simpler Powerwerx supply when it's back in stock, and use the 24 volt supply for the mount in the meantime.
Jerome
P.S. The mount worked perfectly - I really love it, Roland. Great stuff.

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