Re: My GM811G DEC Has Developed a Wiggle...
I think I've come around to this view. Since it's removable this makes the most sense. Just make it stiff so it doesn't move. Got the blue stuff yesterday. Do you take it out, add a drop and then put it back in and adjust?
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Re: My GM811G DEC Has Developed a Wiggle...
Why mess with adding a jam nut? Using a jam nut requires the use of another wrench you won't find in the dark in your bag which you forgot to bring.?
A drop of thread adhesive allows adjustment without additional tools or a change in hardware. Don't over think this.?
--
Chip Louie - Chief Daydreamer Imagination Hardware
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Re: My GM811G DEC Has Developed a Wiggle...
If you want to lock a screw temporarily use a bit of varnish around the thread to set it. Acetone will unlock it. All TAKs grub screws work like that.
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Re: power consumption of a G11/G2 mount in tracking mode
>>>
Do your figures include the amps drawm by the G2 ?
yes - the Gemini 2 delivers power to the motors, so it's all part of the same circuitry?
Hi Brian
Do your figures include the amps drawm by the G2 ?
Thanks
-- Brian?
Brian Valente portfolio
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Re: power consumption of a G11/G2 mount in tracking mode
Hi Tim !
Valuable remark!
I will probably install such a step up converter, the other option being to add another "floor" in my battery stack. I use 3D-printed battery holders , i can arrange in serial mounting; with a fourth floor i get 3,7x4 V that is to say 14,8V or so.
regards
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Re: power consumption of a G11/G2 mount in tracking mode
Hi Brian
Do your figures include the amps drawm by the G2 ?
Thanks
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Re: Polemaster or Sharpcap? how about both
I've had good results using PhD drift align. I've got no choice since polarius is behind a redwood. I also pounded flanged pipe into the ground to make a semi perminant base for the tripod feet to fit in. It often lets me avoid a polar alignment.?
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Re: Polemaster or Sharpcap? how about both
Chip and Brian, I guess I am confused. To polar align, two things are needed:
- Knowledge of where the RA axis is pointing
- Knowledge of where the NCP is
Polemaster determines 2 by asking you to align the asterism (the circles) around Polaris. From this, it knows where the NCP is. Where the RA axis is pointing is estimated by constructing a circle from three points (the whole select a star, rotate, click routine) and estimating its center. There is a fine tuning portion as well, where better estimate of the location of the NCP is made by analyzing star drift. Sharpcap achieves 2 by plate solving your first frame. The second frame allows the construction of a set of radius vectors, the intersection of which is where your RA axis is pointing. In both cases, a fundamental limitation is determining the exact position of the stars. The resolution of the Polemaster's camera is 30 arcseconds/pixel, which is the accuracy claimed by the Polemaster folks. I would imagine that the Sharpcap algorithm suffers from exactly the same limitation since it similarly uses the position of stars to determine the two unknowns- using the same sensor and camera as the Polemaster. So to improve over the Polemaster performance would require better optics than the Polemaster camera/sensor. ?I think people who are getting better performance than Polemaster with Sharpcap are doing so because the resolution of the optics used is better. For example, a 200mm f/4 guide scope would have an aperture and hence resolution significantly greater than the Polemaster optics and would therefore allow a more precise estimate of the NCP. Arun
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Re: power consumption of a G11/G2 mount in tracking mode
My lithium batteries put out about 13.2 after full charge on a lithium batt charger system and take a couple nites of running my mount (an mi250 go to) to droup down to about 12.5. So I¡¯m wondering if you are getting yours charged fully?? ?The voltages u are describing are more typical of lead acid batteries
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On Jun 9, 2020, at 08:51, Timothy Campbell via < tim.campbell@...> wrote: My Lithium Ion batteries put out 11.9 volts when ¡°full¡± and can drop to as low as 10.9 volts. ?So I use a step-up converter. ?
Specifically I use this one: ?
Clear Skies, Tim
On Jun 9, 2020, at 11:46 AM, Brian Valente < bvalente@...> wrote:
Hi J-Phi
It can vary, but generally the numbers I use are 0.2-0.5a for tracking, up to 1.5a for slewing?@ 15v. Slewing is a little tricky because there can be a larger initial spike but there's an offset to the motor start that helps mitigate that
Hello
I'm thinking about a Li-IOn home-made battery pack to power my G11/G2 mount.
I would like to figure out what is the power drawn by the G2?
electronics, knowing that the mount (mechanical drive) need about 2W of?
power in tracking mode.
In other words, I would like to know what is the averaged power?
consumption of the G11/G2, assuming let's say 10% of slewing and 90% of?
tracking, without margin.
Thx J-Phi
--?Brian?
Brian Valente portfolio?
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Re: Polemaster or Sharpcap? how about both
agreed, that focal length is really prime for nebula etc.
i'm imaging the Sadr region (ic 1318) with my similarly spec'd Tak Sky90
[Edited Message Follows]
On Tue, Jun 9, 2020 at 02:27 PM, Brian Valente wrote:
and if I recall you have a fairly wide scope? i want to say around 600mm?
481 mm, by the plate solve calculator thingamajigger. 480 mm by the ad writers.
I've tried 3 cameras on it, My DSLR makes super wide field images. My defunct POS Orion G3 was like looking through a soda straw. But my Atik Infinicky seems to be just right. Even though no aftermarket programs can work with it, it does take nice picturds.
But yes, I'd call it wide field. I'd also call it near perfect for what I target, DSO Nebula. But in all honesty, I don't know any better. You see, I didn't just buy a telescope. I had a specific target in mind, DSO Nebula. So I bought to do that specific thing. ;^)
And I've spent over 5 years working on it. Same telescope, but replacing the things that were absolute crap as I continued to claw my way up the learning curve.
Naw, that 5 minute unguided composition was really just a boo-boo on my part. But it was a real eye opener to me.
?
--
SonnyE
(I suggest viewed in full screen)
-- Brian?
Brian Valente portfolio
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Re: Polemaster or Sharpcap? how about both
>>>
I think the advantage of the PoleMaster's camera is the wider FOV and higher sensitivity. This allows earlier PA with the lower error of the SharpCap app iterative routine. You have no control over what is good enough with the PM software. I have been using this hybrid combination for some time and it works well enough that I won't sell the PoleMaster system, it is just too convent.?
EXACTLY this, well said
I think sharpcap gives the advantage of plate solving so it's potentially more accurate (i say potentially because you need to make sure you enter your location and date/time properly) than?polemaster software
Polemaster camera just adds huge convenience as Chip described
Arun,
I think the advantage of the PoleMaster's camera is the wider FOV and higher sensitivity. This allows earlier PA with the lower error of the SharpCap app iterative routine. You have no control over what is good enough with the PM software. I have been using this hybrid combination for some time and it works well enough that I won't sell the PoleMaster system, it is just too convent.?
--?
Chip Louie - Chief Daydreamer Imagination Hardware
-- Brian?
Brian Valente portfolio
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Re: Polemaster or Sharpcap? how about both
On Tue, Jun 9, 2020 at 02:27 PM, Brian Valente wrote:
and if I recall you have a fairly wide scope? i want to say around 600mm?
481 mm, by the plate solve calculator thingamajigger. 480 mm by the ad writers. I've tried 3 cameras on it, My DSLR makes super wide field images. My defunct POS Orion G3 was like looking through a soda straw. But my Atik Infinicky seems to be just right. Even though no aftermarket programs can work with it, it does take nice picturds. But yes, I'd call it wide field. I'd also call it near perfect for what I target, DSO Nebula. But in all honesty, I don't know any better. You see, I didn't just buy a telescope. I had a specific target in mind, DSO Nebula. So I bought to do that specific thing. ;^) And I've spent over 5 years working on it. Same telescope, but replacing the things that were absolute crap as I continued to claw my way up the learning curve. Naw, that 5 minute unguided composition was really just a boo-boo on my part. But it was a real eye opener to me. ? -- SonnyE (I suggest viewed in full screen)
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Re: Polemaster or Sharpcap? how about both
Arun,
I think the advantage of the PoleMaster's camera is the wider FOV and higher sensitivity. This allows earlier PA with the lower error of the SharpCap app iterative routine. You have no control over what is good enough with the PM software. I have been using this hybrid combination for some time and it works well enough that I won't sell the PoleMaster system, it is just too convent.?
--?
Chip Louie - Chief Daydreamer Imagination Hardware
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awesome?- thanks for giving back :)
Yay! they accepted the change. At some point Stellarmate will get the change and it won't have this problem either.?
?
Jamie
-- Brian?
Brian Valente portfolio
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Yay! they accepted the change. At some point Stellarmate will get the change and it won't have this problem either.?
?
Jamie
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Re: Polemaster or Sharpcap? how about both
Would Sharpcap give better PA than the Polemaster with the Polemaster camera? From my reading, the main benefit of Sharpcap was the possibility to use a larger aperture lens (such as guide scope or even main OTA) which would give you better resolution than the Polemaster does, hence better PA. The fundamental principle of both methods is very similar - in the Polemaster, you select the star and tell the software how its position has changed based on the mount's rotation. Sharpcap does something similar but plate solves. In theory, both methods should be similarly accurate, the difference being the optics used.
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Re: Polemaster or Sharpcap? how about both
With good polar alignment, you can definitely do unguided imaging, and if I recall you have a fairly wide scope? i want to say around 600mm?
>>>Infinicky
lol!?
Well, if you're late to the party, I'm still in Moorepark wondering where it is... 8^(
Naw, I just get my Polaris fix (Mechanical dial in) then building a model and I keep adding stars until I'm satisfied they are slewing as near center as they can get.
Then I go to pickin and a grinnin with my objects of the evening. As soon as one is centered up, I kick PHD2 into gear and start suckin the light out of them.
Although, I forgot to start PHD2 again last night, and by the time I realized it I was almost in 5 minutes. So I let it finish the 5, 60 second images, stacked by my Infinicky. (300s)
I saved it because I was thinking about your Unguided work you had done.
After that, I went back to guiding with PHD2. It did improve the next image some, but not hugely over the unguided one.
Hell of a mount. No PA, no Plate Solve, just run through the briers and brambles. Ain't supposed to work, but it does.
--
SonnyE
(I suggest viewed in full screen)
-- Brian?
Brian Valente portfolio
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Re: Polemaster or Sharpcap? how about both
Well, if you're late to the party, I'm still in Moorepark wondering where it is... 8^(
Naw, I just get my Polaris fix (Mechanical dial in) then building a model and I keep adding stars until I'm satisfied they are slewing as near center as they can get.
Then I go to pickin and a grinnin with my objects of the evening. As soon as one is centered up, I kick PHD2 into gear and start suckin the light out of them.
Although, I forgot to start PHD2 again last night, and by the time I realized it I was almost in 5 minutes. So I let it finish the 5, 60 second images, stacked by my Infinicky. (300s)
I saved it because I was thinking about your Unguided work you had done.
After that, I went back to guiding with PHD2. It did improve the next image some, but not hugely over the unguided one.
Hell of a mount. No PA, no Plate Solve, just run through the briers and brambles. Ain't supposed to work, but it does.
--
SonnyE
(I suggest viewed in full screen)
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Re: Planning your night...
On Tue, Jun 9, 2020 at 06:54 AM, Erik Brogger wrote:
Why did your guiding go into the toilet?!
Glad to help where I can, Erik. I particularly like being able to print a simple list. I can't speak to what the Gemini has onboard. I haven't explored those possibilities. I use Stellarium as my program to seek objects. But the "Tonight's Sky" web page gives me specifics to start with. I did find this:? (I wanted to find out what SAO was the acronym for.) ;^) (Never afraid to demonstrate my ignorance. LOL!) I don't know what went wrong with PHD2 in my computer. But last night it was still FUBAR. So I uninstalled it, then downloaded and installed a fresh, latest of the greatest, version over WiFi out at the mount. It worked out great, and surprisingly, it worked right out of the box! Just a few entries to do. Way better than my first experience with PHD1 and 2. So I was able to grab a couple of Nebulae (Ring, and Dumbell (my personal nemesis) Nebulae) before calling it an evening. We had plans to get going early today. I need to figure out how to make the new version do Pulse Guiding, now. So I need to pick Brian's Brain about that. LOL! If I can't figure it out... It might be a moot point, it's working fine guiding now. ? -- SonnyE (I suggest viewed in full screen)
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Jamie Amendolagine
Chip Louie
Timothy Campbell