Date   

Re: antenna for PMC-Eight, best setup for star parties?

W. Christopher Moses
 

I use a surface book.  Previously I used a surface pro.  Both always worked fine.

Thanks for trying out the utility. Let me know how it goes.

On Monday, June 25, 2018, 8:47:14 PM EDT, jrs1@... [ESPMC-Eight] wrote:


 

Hi Jerry and All,


I was going to try that utility that Chris Moses wrote for switching the PMC-Eight between wired and wireless mode, but I just discovered that my antenna has broken at the connector. Is this antenna the correct type?


https://www.amazon.com/TECHTOO-Antenna-Connector-Wireless-Extender/dp/B00XEFWXGW/ref=sr_1_8?ie=UTF8&qid=1529972088&sr=8-8&keywords=wifi+screw+in+antenna


I haven't used Explore Stars since switching to CDC/POTH for photography, so when I brought my telescope out to a friends house for an impromptu star party, I was struggling with the tiny POTH motion controls while getting my star sync in CDC. I thought maybe Explore Stars on my Surface Pro (in wireless mode) might be the best thing for outreach or star parties. Another thought I had was trying to use a game controller and ASCOMPAD, but I haven't looked into that too much. Does anybody have an opinion for what works best for star parties or outreach?


Thanks,

Jeremy


antenna for PMC-Eight, best setup for star parties?

Jeremy Parker
 

Hi Jerry and All,


I was going to try that utility that Chris Moses wrote for switching the PMC-Eight between wired and wireless mode, but I just discovered that my antenna has broken at the connector. Is this antenna the correct type?


https://www.amazon.com/TECHTOO-Antenna-Connector-Wireless-Extender/dp/B00XEFWXGW/ref=sr_1_8?ie=UTF8&qid=1529972088&sr=8-8&keywords=wifi+screw+in+antenna


I haven't used Explore Stars since switching to CDC/POTH for photography, so when I brought my telescope out to a friends house for an impromptu star party, I was struggling with the tiny POTH motion controls while getting my star sync in CDC. I thought maybe Explore Stars on my Surface Pro (in wireless mode) might be the best thing for outreach or star parties. Another thought I had was trying to use a game controller and ASCOMPAD, but I haven't looked into that too much. Does anybody have an opinion for what works best for star parties or outreach?


Thanks,

Jeremy


Re: PHD2 Guiding for G-11

W. Christopher Moses
 

The standard way to do an indoor start test is to use just a pinhole with a light behind it. But I have seen things like what you described


On Mon, Jun 25, 2018 at 3:45 PM, hubbell_jerry@... [ESPMC-Eight]
wrote:
 

You may be able to user your diagonal to extend out further if you aren't using it already.


Jerry Hubbell
Director Electrical Engineering
Explore Scientific, LLC.


Re: New Groups.io poll from Jerry

Steve Siedentop
 

The Losmandy group moved as well and beyond the usual resistance to change, things have been going well.

-Steve

On Mon, Jun 25, 2018 at 5:56 PM r_hoskin@... [ESPMC-Eight] <ESPMC-Eight@...> wrote:
 

All,


Just FYI - the Deep Sky Stacker support group moved away from Yahoo and over to groups.io a few weeks ago.  So far, so good.  I'm in.  I've been gradually shifting my email off Yahoo for the last few months, and if this flies, will sign up with my fastmail account.

- Bob



New Groups.io poll from Jerry

r_hoskin@...
 

All,


Just FYI - the Deep Sky Stacker support group moved away from Yahoo and over to groups.io a few weeks ago.  So far, so good.  I'm in.  I've been gradually shifting my email off Yahoo for the last few months, and if this flies, will sign up with my fastmail account.

- Bob



New poll for ESPMC-Eight

ESPMC-Eight@...
 

Enter your vote today! A new poll has been created for the ESPMC-Eight group:
I am thinking about moving this group to Groups.io. What do you think about that? Joining Groups.io is as simple as signing up with your existing email. No need to continue to use a Yahoo email.
Created by: hubbell_jerry
  1. Yes, please do.
  2. No, I prefer Yahoo
  3. Maybe, I need to learn more.


Thanks!


Re: PHD2 Guiding for G-11

hubbell_jerry@...
 

You may be able to user your diagonal to extend out further if you aren't using it already.

Jerry Hubbell
Director Electrical Engineering
Explore Scientific, LLC.


Re: PHD2 Guiding for G-11

Mark Lamb
 

I added a photo of my Star Test Mask.

This was what I found on YouTube.  Chris emailed that most others used a black cover with only a small hole in the center.  That would have been much easier.  How large should the center hole be?  I should make one with the rest of black photo board I made my center obstruction with, and glue a piece of cardboard with the hole matching my dewshield (like the holder of my 1st mask).  This should make the centering of the hole almost exact.

Thinking about it, I may need to get another extension tube to test indoors, as after I get my M42/M54 adapter I will take out my T-adapter (50mm), and I need all my exist tubes to focus at 50'.



New Knowledge Base Article

hubbell_jerry@...
 

I have added a new section to the PMC-Eight Knowledge Base called "PMC-Eight TIPS" . I added the first article "TIP - Save time when restarting your PMC-Eight Controller". 


Check it out!


http://hosted.comm100.com/KnowledgeBase/TIP--Save-time-when-restarting-your-PMC-Eight-Controller_A5000036.aspx?id=5000036&siteid=56501


Be sure to check out all the other PMC-Eight articles that are available there too!


Jerry Hubbell

Director Electrical Engineering

Explore Scientific, LLC.


Re: Proper way to do Meridian Flip

Ed Cresong
 

I use the Explore Stars


Re: PHD2 Guiding for G-11

W. Christopher Moses
 

Sounds good, but using mono chromatic light still concerns me. I've seen lots of bizarre interference patterns when working with lasers. I would use white-ish light.
It will be very informative to see how it looks when it's all screwed together


On Mon, Jun 25, 2018 at 2:34 PM, lamb_mark@... [ESPMC-Eight]
wrote:
 

I made a star test mask for my scope out of cardboard.  It is ~9" square of cardboard with circle cut out, ~6" dia, that fits outside my dewshield.  I added 2 wires to make an "X" ~ at the center on which I taped an almost circular ~33mm black disc.  I put this on my dewshield and it puts the 33mm obstruction ~ in the center of my objective

I did star test in my dark basement focusing on a single Red LED bulb flashlight with the scope ~50 ft from the light.  The results are NOT light the traditional test, but I think the diffraction spikes from my wires probably provides useful info; just a guess as I have NO BACKGROUND in this.  The spikes showed Non-symmetry, particular in the horizontal.

I oriented the wire supports to be ~ square with the camera sensor.

I have added 4 photos in my Mark Lamb album that shows the results:
 #1  In Focus, with the homemade mask
#2 OUT, drawtube ~11mm out vs. focus 
#3 IN, drawtube ~11mm in vs. focus 
#4  In Focus, without the homemade mask

Notice that the horizontal spike is split into 2, and as I went out of focus the gap in the horizontal spike increased and pinched to one side.  When I was shooting, I thought the narrow/pinched side of the spike was different depending on In/Out, but I do not see it in these shots (maybe the s/w rotated them different).

I would expect that I should adjust my focuser screws (3 in triangle at bottom) to get symmetric spikes without any splits.  I will NOT do this at this time, as 1st I have a M42/M54 Male/Male adapter ordered to replace the compression collar.  I will recheck after I get my camera attached with this adapter via screw threads. 

Let you know what you think.


Re: Proper way to do Meridian Flip

hubbell_jerry@...
 

Hi Ed,

The ExploreStars application actually commands the meridian flip, the PMC-Eight controller does not do this on its own. The alignment status doesn't matter and will not effect whether the meridian flip is performed. If the local time or longitude coordinate is way off then the LMST will be way off and will not reflect the local meridian.

 The meridian flip is performed when the mount's RA position gets to the LMST (Local Mean Sidereal Time). You can demonstrate this by slewing to a position 2 minutes into the future or 2 minutes after the current LMST and wait for the mount to track to that position. The mount will then automatically slew the mount to pass through the park position and continue on to the other side of the pier.

Jerry Hubbell
Director Electrical Engineering
Explore Scientific, LLC.

---In ESPMC-Eight@..., <b.cresong@...> wrote :

Crickets...Let me ask it this way. I'm assuming the failure to flip was because I didn't have proper polar and 2 star alignments. Am I correct in saying that if everything is aligned correctly, the PMC-8 system will AUTOMATICALLY do a Meridian Flip when it nears the meridian while tracking?


Re: Proper way to do Meridian Flip

W. Christopher Moses
 

One of the nice things about the G-11, I'm not sure about the Exos, is that it doesn't have to flip. It would keep going 24x7, or until the cables got Tangled or there is a collision.
What that means is that it is up to the software to do a flip. Which software are you using

On Mon, Jun 25, 2018 at 1:59 PM, b.cresong@... [ESPMC-Eight]
<ESPMC-Eight@...> wrote:
 

Crickets...Let me ask it this way. I'm assuming the failure to flip was because I didn't have proper polar and 2 star alignments. Am I correct in saying that if everything is aligned correctly, the PMC-8 system will AUTOMATICALLY do a Meridian Flip when it nears the meridian while tracking?


Re: PHD2 Guiding for G-11

Mark Lamb
 

I made a star test mask for my scope out of cardboard.  It is ~9" square of cardboard with circle cut out, ~6" dia, that fits outside my dewshield.  I added 2 wires to make an "X" ~ at the center on which I taped an almost circular ~33mm black disc.  I put this on my dewshield and it puts the 33mm obstruction ~ in the center of my objective

I did star test in my dark basement focusing on a single Red LED bulb flashlight with the scope ~50 ft from the light.  The results are NOT light the traditional test, but I think the diffraction spikes from my wires probably provides useful info; just a guess as I have NO BACKGROUND in this.  The spikes showed Non-symmetry, particular in the horizontal.

I oriented the wire supports to be ~ square with the camera sensor.

I have added 4 photos in my Mark Lamb album that shows the results:
 #1  In Focus, with the homemade mask
#2 OUT, drawtube ~11mm out vs. focus 
#3 IN, drawtube ~11mm in vs. focus 
#4  In Focus, without the homemade mask

Notice that the horizontal spike is split into 2, and as I went out of focus the gap in the horizontal spike increased and pinched to one side.  When I was shooting, I thought the narrow/pinched side of the spike was different depending on In/Out, but I do not see it in these shots (maybe the s/w rotated them different).

I would expect that I should adjust my focuser screws (3 in triangle at bottom) to get symmetric spikes without any splits.  I will NOT do this at this time, as 1st I have a M42/M54 Male/Male adapter ordered to replace the compression collar.  I will recheck after I get my camera attached with this adapter via screw threads. 

Let you know what you think.


Re: Proper way to do Meridian Flip

Ed Cresong
 

Crickets...Let me ask it this way. I'm assuming the failure to flip was because I didn't have proper polar and 2 star alignments. Am I correct in saying that if everything is aligned correctly, the PMC-8 system will AUTOMATICALLY do a Meridian Flip when it nears the meridian while tracking?


Reminder to take poll

W. Christopher Moses
 

If you have not already, please take the OS poll I put up a little while ago.  It really does influence how I write my next tools/utilities.


https://groups.yahoo.com/neo/groups/ESPMC-Eight/polls/poll/19528548?pollType=ENABLED&sortOrder=DESC&orderBy=DATECREATED


Thanks Everyone

Chris



Re: PHD2 Guiding for G-11

W. Christopher Moses
 

Keep us posted


Re: PHD2 Guiding for G-11

Mark Lamb
 

Weather has not been good since last Monday, and does not look good until maybe Fri.

Yesterday, I made a star test mask for my scope out of cardboard.  It is ~9" square of cardboard with circle cut out, ~6" dia, that fits outside my dewshield.  I added 2 wires to make an "X" ~ at the center on which I taped an almost circular ~33mm black disc.  I put this on my dewshield and it puts the 33mm obstruction ~ in the center of my objective

I am thinking about trying to do the star test in my dark basement focusing on a single LED bulb, from my headlamp.  I also have a single RED LED light. 


Re: PHD2 Guiding for G-11

hubbell_jerry@...
 

Hi Mark,,

It sounds like you found the instructions in the manual for adjusting the Crayford style focuser on page 25. These instructions talk about adjusting the tension, but they also affect the collimation of the focuser.



You are correct, there are no drawings of the focuser included. Like most anything else when it comes to basic telescope operation, you need to just play with the adjustments to learn how each of the screws effects the operation of the focuser.

I understand your hesitation, but if you are careful, and just lossen/tighten the screws a little at a time, you will learn quickly what works and what doesn't in tuning your focuser. Before too long you will have your focuser adjusted as needed.

Jerry Hubbell
Director Electrical Engineering
Explore Scientific, LLC.




Re: Beginner question-am I following the right steps?

hubbell_jerry@...
 

Hi Lynn,

Technically, if you do a very good to excellent PHYSICAL polar alignment then the mount should point very close to any object you slew to (within the view of a 25 mm eyepiece) so you are correct. But, there are other small errors that can cause the pointing to be off. If you use ExploreStars a 3 star (virtual) alignment will correct for these small errors to improve your pointing. To get the best results you need to set the time on your tablet/PC to the nearest second and also use a cross-hair eyepiece when centering and syncing on the alignment stars.

Jerry Hubbell
Director Electrical Engineering
Explore Scientific, LLC.

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