Date   

Re: Power cable conductor gage (AWG) of

Christopher Erickson
 

Maybe I should apply with AP to be an emergency-alternate backup tech support geek...

...if they would let me work from my astro-cave here in Hawaii.

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


On Fri, Apr 9, 2021 at 1:54 PM Eric Dreher <ericpdreher@...> wrote:
I laughed out loud at this one, Chris.  I'm retired from AT&T and also hold an Extra class ham radio license.  You tempted me. :)


Re: Power cable conductor gage (AWG) of

Christopher Erickson
 

That was an attempted inoculation. LOL

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


On Fri, Apr 9, 2021 at 10:06 AM Daniel Marcus <DMa3141551@...> wrote:
Hi Chris
don't give them any ideas LOL
Dan Marcus


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Christopher Erickson <christopher.k.erickson@...>
Sent: Friday, April 9, 2021 3:47 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Power cable conductor gage (AWG) of
 
At least nobody started talking about skin effect, nominal velocity of propagation, current NEC electrical code requirements, insulation dielectric characteristics, breakdown voltages, mutual inductance, impedance, hysteresis, magnetic fields, reluctance, EMI shielding, plating techniques, ductility, annealing, connector MTBF, connector insertion lifetimes, NEMA ratings, EMP, lightning protection, R-56 compliance, insulation color coding, insulation UV ratings, US vs. ISO specifications, suppleness.......


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

On Fri, Apr 9, 2021, 9:36 AM Seb@stro <sebastiendore1@...> wrote:
Kenneth,

Yeah, tought of that but I found them a bit expensive to ship to my location (Canada) so I got them from a local dealer instead. Thanks anyway.

CS!
Sébastien


De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Kenneth Tan <ktanhs@...>
Envoyé : 9 avril 2021 13:47
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Power cable conductor gage (AWG) of
 
Try getting the cables from Powerwerx. They also supply the Anderson powerpole connectors. 

On Sat, 10 Apr 2021 at 01:05, Seb@stro <sebastiendore1@...> wrote:
I was looking at SJEOOW Seoprene Cu cable from Southwire (similar to the power cable that goes from the power source to 12-24V input on the CP5). Those are rated at 300V and stay quite flexible even at very low temperature (rated from -50 to 105 Celsius). The 16/2 nominal DCR is 4.05 Ohms/1000ft and composed of 26 strands of 30 AWG conductors. 

If I can find it somewhere in bulk quanity, I should be good to go.

CS!
Sébastien


Re: Power cable conductor gage (AWG) of

Eric Dreher
 

I laughed out loud at this one, Chris.  I'm retired from AT&T and also hold an Extra class ham radio license.  You tempted me. :)


APCC PRO and Telescope Control

Jack Huerkamp
 

I have been using APCC Standard for years to control my AP1600 using SkyTools PRO V3 and now SkyTools V4 Imaging. 
I have the mount connected to the computer using the Serial/USB connection on COM3.
I have two Virtual Ports created - COM6 and COM 12.
I have been connecting SkyTools to the mount using ASCOM V2 Telescope Driver - v5.30.10 on COM12 and occasionally I get a lost communication error message, SkyTools shuts down, and I then have to restart SkyTools and reconnect it.
I thought that maybe since I was on COM12, that was the problem.  So I created COM31, went into the ACSOM V2 Telescope Driver setup for SkyTools, changed the COM port from 12 to 31, checked the port and it was found.
But when I went to connect SkyTools to the mount, a connection could not be established.
I eventually went back to COM12 and it connected right away.

Any idea what the problem could be?  I would like to use the higher COM numbers if possible.

Yours truly,

Jack Huerkamp


Re: Power cable conductor gage (AWG) of

Greg McCall
 

Also, keep in mind it's not just the cable thickness by itself. The length of cable is also part of the equation (as well as if it's in a bundle, underground, if it's double insulated, etc.).

If you have a long cable run, you will need a thicker cable.

The advice of checking the voltage drop with a multimeter is a good way of checking it. Check it under the load conditions such as with motors running, dew heater on max and camera cooler on max during initial warm-up all at the same time.


Re: Mach2 Slew Speed, Power, and Voltage Question #Mach2GTO

Greg McCall
 

Hi John,
That's excellent information and I much appreciate the detail. You have also raised something that I didn't consider yet with those popular power supply modules as I had not really seriously considered a 12v to 24v converter. You have also saved some effort in those current measurements so again, thanks for that detail.

(I wonder what the 12v current is just operating the Mach2 at 12v.  Something to watch next time. -- The AP spec of 5A minimum is not very helpful as you usually plan for a maximum both in power supply, cabling & fusing)

My LiFePO4 batteries use 14.6v but I know I can set the max on my chargers if needed and the float voltage is 13.8.

I also use a NUC with a 12v to 19v converter. It's designed to power a laptop in a car so I assumed it could handle at least the charge voltages of lead-acid. (just replaced the cigarette lighter plug with a powerpole connector)

cheers
Greg


Re: About APCC and ISS tracking and PC Time

ap@CaptivePhotons.com
 

Are any of these using the 1 PPS feature of GPS for better accuracy than the serial data stream?   

 

I’m not sure there is a practical difference but they all seemed to not have it, not sure if that’s a windows/USB thing, or just that they are a bit behind, or if there’s something expensive about it so it doesn’t show up in these products?

 

I went to buy one and felt like I was getting a CFL light bulb instead of LED – not awful, just not current.

 

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of drgert1 via groups.io
Sent: Friday, April 9, 2021 4:31 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] About APCC and ISS tracking and PC Time

 

@Dale & All,

The app came for free with the GPS dongle. Not very sophisticated. Thus probably missing out on DST. I asked NMEATime2 about preferences of COM over USB vs BT. BT seems to be deprecated. More interesting the 2sec gap between Win10 clock and GPS. I had used the sync with network in the MSFT clock settings popup just 5min prior. Alas I probably hadn't let the GPS soak for  long enough. Will try again.

Ping for Ray : Any ideas about hand controller / joystick override for the ISS tracking ?

Cheers,
Gert


Re: Power cable conductor gage (AWG) of

Stone, Jack G
 

Migration of electrons have to exceed 740MHz to start migrating to the outer circumference of the conductor (depends on the conductor structure).  So your USB or interface cabling should account for signal attenuation or at least understand for the 15’ USB3 what is the specification!!!  Cannot go cheap on these – and ensure that they are well shielded, aluminum paper wrap is not shielding.

 

For the sake of our equipment – The mount will impart the largest di/dt.

Taking into account the data collected based on the loading (load and Fulcrum (lever) – you can ascertain at some maximum skew rate and the amount of current sinked  to mitigate violating the minimum voltage which can damage the instrument or throw off the accuracy.

 

That is the goal I would assume – taking into account the various loads from other devices; cameras, conversion factors, USB controllers and communication devices all have voltage limits.

If you exceed that minimum voltage in any of these devices you can expect inoperability. 

 

So understanding your power consumption and your input voltage vs. full load is the key goal I would suspect.

 

Minimalist path – use the thickest gauge with the highest strand count.  Source a silicon based insulator (varmints for some reason will not eat) and ensure that you contacts are sealed from moisture.  Sealed connects are important.  From your power distribution panel to the equipment. 

Purchase the best interface cables you can afford – after spending that $8K on that camera only to use dollar store USB – you would induce all that noise from the transition out of the camera to your storage device.  Does not make sense when you looking for that ultra low noise.

 

Cover unused connectors – at some point you might need them and if they are corroded it will impact the capability for the physical connection.  Some use RTV or clear silicon caulking.

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Seb@stro
Sent: Friday, April 09, 2021 1:12 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Power cable conductor gage (AWG) of

 

Christopher,

 

I leave half of that work to the UL/CSA compliance guys. 

 

And then, skin effect and velocity of propagation at 0Hz could be an interesting discussion... 😉

 

CS!

Sébastien

 


De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Christopher Erickson <christopher.k.erickson@...>
Envoyé : 9 avril 2021 15:47
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Power cable conductor gage (AWG) of

 

At least nobody started talking about skin effect, nominal velocity of propagation, current NEC electrical code requirements, insulation dielectric characteristics, breakdown voltages, mutual inductance, impedance, hysteresis, magnetic fields, reluctance, EMI shielding, plating techniques, ductility, annealing, connector MTBF, connector insertion lifetimes, NEMA ratings, EMP, lightning protection, R-56 compliance, insulation color coding, insulation UV ratings, US vs. ISO specifications, suppleness.......


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


Re: About APCC and ISS tracking and PC Time

drgert1
 

@Dale & All,

The app came for free with the GPS dongle. Not very sophisticated. Thus probably missing out on DST. I asked NMEATime2 about preferences of COM over USB vs BT. BT seems to be deprecated. More interesting the 2sec gap between Win10 clock and GPS. I had used the sync with network in the MSFT clock settings popup just 5min prior. Alas I probably hadn't let the GPS soak for  long enough. Will try again.

Ping for Ray : Any ideas about hand controller / joystick override for the ISS tracking ?

Cheers,
Gert


Re: Power cable conductor gage (AWG) of

Sébastien Doré
 

Christopher,

I leave half of that work to the UL/CSA compliance guys. 

And then, skin effect and velocity of propagation at 0Hz could be an interesting discussion... 😉

CS!
Sébastien


De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Christopher Erickson <christopher.k.erickson@...>
Envoyé : 9 avril 2021 15:47
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Power cable conductor gage (AWG) of
 
At least nobody started talking about skin effect, nominal velocity of propagation, current NEC electrical code requirements, insulation dielectric characteristics, breakdown voltages, mutual inductance, impedance, hysteresis, magnetic fields, reluctance, EMI shielding, plating techniques, ductility, annealing, connector MTBF, connector insertion lifetimes, NEMA ratings, EMP, lightning protection, R-56 compliance, insulation color coding, insulation UV ratings, US vs. ISO specifications, suppleness.......


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


Re: Power cable conductor gage (AWG) of

Daniel Marcus
 

Hi Chris
don't give them any ideas LOL
Dan Marcus


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Christopher Erickson <christopher.k.erickson@...>
Sent: Friday, April 9, 2021 3:47 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Power cable conductor gage (AWG) of
 
At least nobody started talking about skin effect, nominal velocity of propagation, current NEC electrical code requirements, insulation dielectric characteristics, breakdown voltages, mutual inductance, impedance, hysteresis, magnetic fields, reluctance, EMI shielding, plating techniques, ductility, annealing, connector MTBF, connector insertion lifetimes, NEMA ratings, EMP, lightning protection, R-56 compliance, insulation color coding, insulation UV ratings, US vs. ISO specifications, suppleness.......


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

On Fri, Apr 9, 2021, 9:36 AM Seb@stro <sebastiendore1@...> wrote:
Kenneth,

Yeah, tought of that but I found them a bit expensive to ship to my location (Canada) so I got them from a local dealer instead. Thanks anyway.

CS!
Sébastien


De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Kenneth Tan <ktanhs@...>
Envoyé : 9 avril 2021 13:47
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Power cable conductor gage (AWG) of
 
Try getting the cables from Powerwerx. They also supply the Anderson powerpole connectors. 

On Sat, 10 Apr 2021 at 01:05, Seb@stro <sebastiendore1@...> wrote:
I was looking at SJEOOW Seoprene Cu cable from Southwire (similar to the power cable that goes from the power source to 12-24V input on the CP5). Those are rated at 300V and stay quite flexible even at very low temperature (rated from -50 to 105 Celsius). The 16/2 nominal DCR is 4.05 Ohms/1000ft and composed of 26 strands of 30 AWG conductors. 

If I can find it somewhere in bulk quanity, I should be good to go.

CS!
Sébastien


Re: Power cable conductor gage (AWG) of

Sébastien Doré
 

Mike,

Technically, all the points made were valid, but practically, to power an AP mount, don't over-think it! 

It doesn't change a thing if the mount is an AP or other brand, minimum voltage requirement needs to be met for proper operation. 

Besides, the extension I plan to make with that cable isn't even to power the mount, but rather my pegasus powerbox to which all cameras, NUC and peripherals are connected. All this can pull significant amperage at times, hence causing the undesirable voltage drop (the NUC is the most unpredictable part of the system). I should probably have added that my setup is for 100% portable use (so weight is also a concern) and aims to be powered by a single 12V 24Ah sealed battery, even in the cold winter nights I can get at my place (-20 to -25C).

But to those who don't require/like to fiddle with that level of optimization, I agree using a higher gauge might be the way to go...

CS!
Sébastien


Re: Power cable conductor gage (AWG) of

Christopher Erickson
 

At least nobody started talking about skin effect, nominal velocity of propagation, current NEC electrical code requirements, insulation dielectric characteristics, breakdown voltages, mutual inductance, impedance, hysteresis, magnetic fields, reluctance, EMI shielding, plating techniques, ductility, annealing, connector MTBF, connector insertion lifetimes, NEMA ratings, EMP, lightning protection, R-56 compliance, insulation color coding, insulation UV ratings, US vs. ISO specifications, suppleness.......


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

On Fri, Apr 9, 2021, 9:36 AM Seb@stro <sebastiendore1@...> wrote:
Kenneth,

Yeah, tought of that but I found them a bit expensive to ship to my location (Canada) so I got them from a local dealer instead. Thanks anyway.

CS!
Sébastien


De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Kenneth Tan <ktanhs@...>
Envoyé : 9 avril 2021 13:47
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Power cable conductor gage (AWG) of
 
Try getting the cables from Powerwerx. They also supply the Anderson powerpole connectors. 

On Sat, 10 Apr 2021 at 01:05, Seb@stro <sebastiendore1@...> wrote:
I was looking at SJEOOW Seoprene Cu cable from Southwire (similar to the power cable that goes from the power source to 12-24V input on the CP5). Those are rated at 300V and stay quite flexible even at very low temperature (rated from -50 to 105 Celsius). The 16/2 nominal DCR is 4.05 Ohms/1000ft and composed of 26 strands of 30 AWG conductors. 

If I can find it somewhere in bulk quanity, I should be good to go.

CS!
Sébastien


Re: Power cable conductor gage (AWG) of

Sébastien Doré
 

Kenneth,

Yeah, tought of that but I found them a bit expensive to ship to my location (Canada) so I got them from a local dealer instead. Thanks anyway.

CS!
Sébastien


De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Kenneth Tan <ktanhs@...>
Envoyé : 9 avril 2021 13:47
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Power cable conductor gage (AWG) of
 
Try getting the cables from Powerwerx. They also supply the Anderson powerpole connectors. 

On Sat, 10 Apr 2021 at 01:05, Seb@stro <sebastiendore1@...> wrote:
I was looking at SJEOOW Seoprene Cu cable from Southwire (similar to the power cable that goes from the power source to 12-24V input on the CP5). Those are rated at 300V and stay quite flexible even at very low temperature (rated from -50 to 105 Celsius). The 16/2 nominal DCR is 4.05 Ohms/1000ft and composed of 26 strands of 30 AWG conductors. 

If I can find it somewhere in bulk quanity, I should be good to go.

CS!
Sébastien


Re: Power cable conductor gage (AWG) of

Sébastien Doré
 

Some of you people are REALLY over-thinking this...

Christopher, I plead guilty. 😬

But as you'll certainly agree, better do it right once and for all. I personnaly don't like oversizing everything just to be on the safe side when I know I can optimize something. But that's just me, trying to pull every tenth of an ounce of performance out of my equipment... 

And hey, system integration is half the fun of this hobby. Using AP equipement doesn't leave many things to fuss with so I thought why not try to bring the rest to the same standard.

CS!
Sébastien


Re: Mac Desktop version of SkySafari Updated today to 6.8.X

Allen Ruckle
 

Mac OS ap SkySafai 6 plus was updated to version 6.8.1 this week but they do not appear to know about the Park positions and Home location for the Astro-Physics GTO mounts.  I know this because after installing the latest SkySafari update and tested the new update 6.9.1 which has not been corrected.

The Simulated Curriculum product forum as configured will not allow my attempts to register a new account.  This prevents me from posting my findings on the forum to notify them of the problem directly.

aruckle


Re: Power cable conductor gage (AWG) of

Mike Dodd
 

On 4/9/2021 1:52 PM, Christopher Erickson wrote:
Some of you people are REALLY over-thinking this...
That's what I was going to say.

Technically, all the points made were valid, but practically, to power an AP mount, don't over-think it! Get some 16AWG insulated stranded copper wire (14AWG for REALLY long runs), and be done with it.

--- Mike
http://astronomy.mdodd.com


Re: Power cable conductor gage (AWG) of

Kenneth Tan
 

🤣🤣🤣

On Sat, 10 Apr 2021 at 01:53, Christopher Erickson <christopher.k.erickson@...> wrote:
Some of you people are REALLY over-thinking this...

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


On Fri, Apr 9, 2021 at 7:48 AM Kenneth Tan <ktanhs@...> wrote:
Try getting the cables from Powerwerx. They also supply the Anderson powerpole connectors. 

On Sat, 10 Apr 2021 at 01:05, Seb@stro <sebastiendore1@...> wrote:
I was looking at SJEOOW Seoprene Cu cable from Southwire (similar to the power cable that goes from the power source to 12-24V input on the CP5). Those are rated at 300V and stay quite flexible even at very low temperature (rated from -50 to 105 Celsius). The 16/2 nominal DCR is 4.05 Ohms/1000ft and composed of 26 strands of 30 AWG conductors. 

If I can find it somewhere in bulk quanity, I should be good to go.

CS!
Sébastien


Re: Power cable conductor gage (AWG) of

Christopher Erickson
 

Some of you people are REALLY over-thinking this...

"My advice is always free and worth every penny!"

-Christopher Erickson
Observatory Engineer
Summit Kinetics
Waikoloa, Hawaii


On Fri, Apr 9, 2021 at 7:48 AM Kenneth Tan <ktanhs@...> wrote:
Try getting the cables from Powerwerx. They also supply the Anderson powerpole connectors. 

On Sat, 10 Apr 2021 at 01:05, Seb@stro <sebastiendore1@...> wrote:
I was looking at SJEOOW Seoprene Cu cable from Southwire (similar to the power cable that goes from the power source to 12-24V input on the CP5). Those are rated at 300V and stay quite flexible even at very low temperature (rated from -50 to 105 Celsius). The 16/2 nominal DCR is 4.05 Ohms/1000ft and composed of 26 strands of 30 AWG conductors. 

If I can find it somewhere in bulk quanity, I should be good to go.

CS!
Sébastien


Re: Power cable conductor gage (AWG) of

Kenneth Tan
 

Try getting the cables from Powerwerx. They also supply the Anderson powerpole connectors. 

On Sat, 10 Apr 2021 at 01:05, Seb@stro <sebastiendore1@...> wrote:
I was looking at SJEOOW Seoprene Cu cable from Southwire (similar to the power cable that goes from the power source to 12-24V input on the CP5). Those are rated at 300V and stay quite flexible even at very low temperature (rated from -50 to 105 Celsius). The 16/2 nominal DCR is 4.05 Ohms/1000ft and composed of 26 strands of 30 AWG conductors. 

If I can find it somewhere in bulk quanity, I should be good to go.

CS!
Sébastien

6741 - 6760 of 84431