heaven
Mike C
I have arrived...
Last episode we were fretting about pointing models, plate solves, ASCOM contention. This episode resolves it all! I am now hands-off, I go out to open the observatory and turn on the mount and camera and thats it. In this frosty weather, that is so sweet. Previous Episode "My AP1200 Points Off Into Space!" Solution: Maxpoint... whipped this problem REAL good. Really revolutionized my total time available for taking pictures, no more futzing with hand paddles and eyepieces, period. Previous Episode "Cant pulseguide w/ MaxPoint ASCOM hub!!" Solution: Stop trying. I bought a GP-USB device and plugged it in and switched PHD guider to GP-USB and now my planetarium and maxpoint stay connected all the time. PHD graphs show more consistent guiding behavior with the GP-USB than the ASCOM. (though in the results, I cannot tell.)
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Re: polar alignment with track and accumulate in ccdops
Gerald Sargent wrote:
Track and Accumulate error graph graph shows an X and Y plot. With myYou should determine that for yourself experimentally. Take an image, then press the left or right direction key to move the scope on the RA axis. Which direction to do star move on the image? That's the RA axis. To confirm, repeat the experiment with the up or down direction key and verify the star moves on the other axis. Note this information for future reference -- it's easy to forget. Mike ----- Mike Dodd Montpelier, VA USA http://astronomy.mdodd.com
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polar alignment with track and accumulate in ccdops
Gerald Sargent <sargentg@...>
At a restricted location view about +5 to +50 declination at suburban
Brisbane I am using the star Markab for track and accumulate polar alignment.having done a rough one using the park 1&2 with a level and a brief glimpse through the trees to the west at the sun about a half hour before sunset - which allows usable goto for Markab.The telescope is then on the east side of the mount Track and Accumulate error graph graph shows an X and Y plot. With my SBIG ST4000 such that the flat portion with the connectors roughly horizontal and upwards. I am a bit confused (by lack of information in the manual) which axes X and Y ? Then on the error graph there are four columns of figures headed "Pos" which I take to be the pixel position of the star in X and Y, measured from where ? top or bottom left or right ? "Err" I assume means error since previous measure. The word registration is used without qualification - I assume this means since the guide star fixed for the first exposure and difference of successive image guide star position from previous image ? What is Res ? and what is averaged to get Ave ? The method clearly is an excellent one - I just cannot get it to work - all because I do not know which figures to relate to what, and how to use them. Help from some experienced user appreciated - Gerald.
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Re: Tungsten Disulphide Coating
ivanong
Dave,
toggle quoted messageShow quoted text
Thanks very much for the link, it was very instructive reading for my personal education. Ivan
--- In ap-gto@..., "Dave Rose" <astrogroups@...> wrote:
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorr...
Richard Kinsey
Hi Howard, many thanks for your advice. I have done as you suggest
and all is back to normal again. I haven't tried the ASCOM driver and probably wont for a while because I very rarely use it. Best wishes, Richard --- In ap-gto@..., "Howard" <howard@...> wrote: file, and when I learned that you were located in western England, the wholeeffect. The problem should be addressed in the next major release of the keypadthe 3 = Get Time / Loc. From Mount command or the EXT setting in the keypadfrom western England (or from Portugal or parts of western Africa) in thehour behind GMT instead of one hour ahead. When you initialize with theover the years, which explains why it has only recently surfaced. For abit more detail, see:Time / Loc. From Mount command should not really be used under almost allneeded. You don't gain anything in terms of pointing accuracy or mountdo not fully understand the way in which the servo, the keypad and anof the mounting. Using these features simply because you are alsousing a computer is not a good idea.command, we may need to undo what has occurred and get you re-oriented. Iwould start by double checking the time and location data in the keypad totime to the computer's time using the command in the keypad, try thisdate and daylight savings part of the settings are correct. (You mayhave forgotten to reset the DST in the keypad this past weekend,although the computer will have done so automatically.) Then, reset your timeto match the computer clock as closely as possible. I usually lookat my computer clock and set the keypad several seconds ahead. Then Iwait for the computer clock to catch up and press GoTo at the momentthat the two are equal. I can usually get my keypad clock and computer clockoften for various testing purposes.)your auto-connect to NO, then power down the mount. Position the mountin the correct Park 1 position manually and re tighten the clutches.from Reference Park 1. You should now be able to go to any object,center it and then re-calibrate to nail down your pointing. Now, if youthe keypad to auto-connect = YES at this point.must change the time for the computer. Keep in mind that the offset toGMT as stated at the top of the ASCOM driver is the net offset includingalways let the keypad initialize the mount if practical to do so.Behalf Of Richard Kinseydriver showing incorr...a mystery.40yahoogroups.com> , "Ray Gralak" <rgr@> wrote:WindowsWhat still puzzles me isRichard, did see my previous post on how to check that your TimeforZone is correct? Also make sure that "Automatically adjust clock daylight saving changes" is checked.
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorr...
Hi Richard,
I did a bit of hunting to find an answer, and the problem was right under my nose, as is often the case. I checked your customer file, and when I learned that you were located in western England, the whole problem suddenly made sense. There is a minor issue that has been present in the keypad firmware from the beginning, that we have only recently become aware of, and that only affects customers in western longitudes with time zone zero when daylight savings is in effect. The problem should be addressed in the next major release of the keypad firmware, which will be v.4.20. In a nutshell, you can NOT use the 3 = Get Time / Loc. From Mount command or the EXT setting in the keypad from western England (or from Portugal or parts of western Africa) in the summertime. It will cause the keypad to think that you are one hour behind GMT instead of one hour ahead. When you initialize with the keypad, it does so correctly, so the servo is correct and the mount operates properly. This hasn't proven to be a significant problem over the years, which explains why it has only recently surfaced. For a bit more detail, see: http://www.astro-physics.com/tech_support/mounts/keypad_v417.pdf I should point out to everyone that the EXT setting and the 3 = Get Time / Loc. From Mount command should not really be used under almost all normal observing and imaging situations. They are not normally needed. You don't gain anything in terms of pointing accuracy or mount performance, and you can create more problems than you solve if you do not fully understand the way in which the servo, the keypad and an external computer do, and do not, interact. They were put into the firmware for a few very specific circumstances in remote operation of the mounting. Using these features simply because you are also using a computer is not a good idea. Since you have already used the 3 = Get Time / Loc. From Mount command, we may need to undo what has occurred and get you re-oriented. I would start by double checking the time and location data in the keypad to make sure they are correct. Since you can't sync the keypad's time to the computer's time using the command in the keypad, try this alternative method: Go into setup and first double check that the date and daylight savings part of the settings are correct. (You may have forgotten to reset the DST in the keypad this past weekend, although the computer will have done so automatically.) Then, reset your time to match the computer clock as closely as possible. I usually look at my computer clock and set the keypad several seconds ahead. Then I wait for the computer clock to catch up and press GoTo at the moment that the two are equal. I can usually get my keypad clock and computer clock within a second or two this way. (I have had to do this quite often for various testing purposes.) To reestablish the correct orientation after doing this, first set your auto-connect to NO, then power down the mount. Position the mount in the correct Park 1 position manually and re tighten the clutches. Power up the mount, enter your location, and then select 4 = Resume from Reference Park 1. You should now be able to go to any object, center it and then re-calibrate to nail down your pointing. Now, if you return to Park 1, it should do so correctly. You can also reset the keypad to auto-connect = YES at this point. Fortunately, the DST issue disappeared this past weekend for you and will do so next weekend for us in the US when we all "fall back" and return to standard time. Finally, as far as I know, the current ASCOM driver uses the mount's time settings if it is connected to a mount that has already been initialized. ASCOM uses the computer's time settings if it is initializing the mount. To change the time for the driver, you must change the time for the computer. Keep in mind that the offset to GMT as stated at the top of the ASCOM driver is the net offset including DST, not the time zone. As Roland advised earlier, I would always let the keypad initialize the mount if practical to do so. Mag. 7 skies! Howard Hedlund Astro-Physics, Inc. 815-282-1513 ________________________________ From: ap-gto@... [mailto:ap-gto@...] On Behalf Of Richard Kinsey Sent: Tuesday, October 28, 2008 1:12 PM To: ap-gto@... Subject: [ap-gto] Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorr... Hi Ray, I have checked the time zone setting of the PC and it is correct. The automatically adjust clock for daylight saving was checked. How the ASCOM driver is using the wrong time zone remains a mystery. Besr wishes, Richard --- In ap-gto@... <mailto:ap-gto%40yahoogroups.com> , "Ray Gralak" <rgr@...> wrote: TimeWhat still puzzles me isRichard, did see my previous post on how to check that your Windows Zone is correct? Also make sure that "Automatically adjust clock for
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorr...
Richard Kinsey
Hi Ray, I have checked the time zone setting of the PC and it is
correct. The automatically adjust clock for daylight saving was checked. How the ASCOM driver is using the wrong time zone remains a mystery. Besr wishes, Richard --- In ap-gto@..., "Ray Gralak" <rgr@...> wrote: TimeWhat still puzzles me isRichard, did see my previous post on how to check that your Windows Zone is correct? Also make sure that "Automatically adjust clock for
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing in...
Richard Kinsey
Rolando, I do have the keypad set to autostart and did not use any
extrenal programs with the mount last night and it still parked on the wrong side of the pier. Richard --- In ap-gto@..., chris1011@... wrote: the ASCOM. TheASCOM driver to the correct time zone. Perhaps I should post aThere is no reason to send site information to the mount from mount's own keypad has all the correct information in its memoryand if you use Autostart Yes, it will do a bangup job of starting the mount andparking it on the correct side. No need to use Get Time From Mount, etc.available with built-in ASCOM that does work. Right now there are problems withusing ASCOM to control the startup of the mount. Please understand that you can do100% of the control of the mount via any external program, but the startupfunction should be left to the keypad, unless you really know what you aredoing. Leave the keypad set to Autostart YES and you will be fine.expert and knows all the ins and outs of Pulse Guide, ASCOM and the new APcontrol program for contolling the mount from your laptop.out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorrect time zone
Richard Kinsey
Hi Ray, thanks for your message. I will check the time zone settings
on the PC. Presumably that is where ASCOM obtains its information from. I have been somewhat confused with the ASCOm driver for s few weeks. When I used it a week or so ago with PEMPro, the calibration wizard in PEMPro was showing the scope to be pointing considerably further west than it actually was. I checked the ASCOM driver and the time was wrong, even though the computer's time was correct. When I used the slew function in PEMPro the mount slewed way past the meridian. I gave up with it after a while. Best wishes, Richard --- In ap-gto@..., "Ray Gralak" <rgr@...> wrote: by right mouse clicking on the system time on the lower right of the task bar. Next, select "Adjust Date/Time" and click the Time Zone tab. Here is a link with a picture: in scopethe keypad.Park position 1 is due north, and that can be either with the theon the eastside or on the west side. In the keypad, we send the scope to earlywest side bycalculating an RA position that is approximately 10 seconds keypad,from truenorth. If your laptop is off by 10 seconds or more from the pastyou couldvery easily be on the other side of the meridian line. Thereforewhen you sendthe mount to Park1, it uses the time in the keypad, and when themount servolooks at the requested RA position, it will decide that it is reallythe meridianand sends the scope to the east side of the mount.your external keypadno longerin charge. If you really need to go back and forth between noand laptop,then you should upload the mount's time to the keypad by usingthe "Get TimeFrom Mount" function in your keypad. (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?registration required and great graphics â€" check itout! <http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?> redir=http://www.games.com?ncid=emlcntusgame00000001
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorr...
Ray Gralak <rgr@...>
What still puzzles me isRichard, did see my previous post on how to check that your Windows Time Zone is correct? Also make sure that "Automatically adjust clock for daylight saving changes" is checked. -Ray
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorr...
Richard Kinsey
Rolando, thanks for explaining that. I have found the relevant
section in the 4.12 manual. What still puzzles me is how to set the ASCOM driver to the correct time zone. Perhaps I should post a message on the ASCOM user group. Thanks, Richard --- In ap-gto@..., chris1011@... wrote: and hour.established that it is the correct time (within a few seconds). I isI have also checked the time zone within the keypad and that is ofshowing the wrong time zone. There doesn't appear to be any means thechanging the data shown in the ASCOM driver. Your advice would beWhen you use "Get Time From Mount" in the keypad, then you have set keypad to EXT. From then on, you no longer have the keypad incontrol and really should not use any of the keypad functions, except for thedirection buttons. out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorrect time zone
Ray Gralak <rgr@...>
Hi Richard,
toggle quoted messageShow quoted text
Double check your PC's time zone and daylight savings time settings by right mouse clicking on the system time on the lower right of the task bar. Next, select "Adjust Date/Time" and click the Time Zone tab. Here is a link with a picture: http://windows.about.com/od/customizingwindows/ss/time_zone_2.htm -Ray
-----Original Message-----
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Re: AP1200 Park position no.1 reversed
Richard Kinsey
Rolando, thanks for your reply. Can you please tell me where the Ext
setting can be found? I have looked in the 4.12 manual and have been unable to find it. Many thanks, Richard --- In ap-gto@..., chris1011@... wrote: ASCOM thedriver would obtain the correct time from the mount. Also that thetime stored in the mount would be the same as that displayed by Timekeypad. From what you have said, this is not the case. mountfrom Mount function in the keypad, but how can I correct the time driver?is holding the correct time, the ASCOM driver will also show the When theCheck to make shure that you do not have the keypad set to EXT. keypad is in EXT, it is no longer in charge and all site data mustbe sent correctly to the mount from your external program (if this data isnot correct, then you can have problems with using Park functions in the keypad, aswell as meridian flip discrepancies). You would use EXT only if you aredoing remote imaging and will not be present at the telescope. You can alsodisconnect the keypad if you do remote imaging. If you are present at the scope,there is no reason to set the keypad to EXT. It just complicates matters.out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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AP1200 Park position no.1 reversed - ASCOM driver showing incorrect time zone
Richard Kinsey
Rolando, I have used the Get Time From Mount option on the keypad and
established that it is the correct time (within a few seconds). I have also re-visited the ASCOM driver and discovered that it is showing the correct time, but the time zone is incorrect by one hour. I have also checked the time zone within the keypad and that is correct, so it is a bit of a mystery as to why the ASCOM driver is showing the wrong time zone. There doesn't appear to be any means of changing the data shown in the ASCOM driver. Your advice would be gratefully received. Many thanks, Richard --- In ap-gto@..., chris1011@... wrote: changed so north, withthat the scope is now on the east side of the mount, facing positionthe counterweight shaft horizontal. In other words, as park mount. Theno.1 should be, but with the scope on the wrong side of the time datamount otherwise appears to be working normally.You probably are using the EXT mode and feeding your mount with from your laptop that is a few seconds different from the time inthe keypad. Park position 1 is due north, and that can be either with the scopeon the east side or on the west side. In the keypad, we send the scope to thewest side by calculating an RA position that is approximately 10 seconds earlyfrom true north. If your laptop is off by 10 seconds or more from the keypad,you could very easily be on the other side of the meridian line. Thereforewhen you send the mount to Park1, it uses the time in the keypad, and when themount servo looks at the requested RA position, it will decide that it is pastthe meridian and sends the scope to the east side of the mount.your external computer program for all your needs. In EXT, the keypad is reallyno longer in charge. If you really need to go back and forth between keypadand laptop, then you should upload the mount's time to the keypad by usingthe "Get Time From Mount" function in your keypad.out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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Re: M33 in LRGB and HaLRGB
eja24601
Thanks, Roland! Hopefully some day I will be able to share an image
through one of your scopes on this mount :) Eric --- In ap-gto@..., chris1011@... wrote: it out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing in...
Roland Christen
In a message dated 10/28/2008 10:51:35 AM Central Daylight Time,
richard.kinsey@... writes: Rolando, I do have the keypad set to autostart and did not use any1) You may have started with the keypad in Autostart, but if you did a Get Time From Mount function with the keypad, it will set it automatically to EXT mode. 2) if you used any ASCOM function to set a new time in your moutn servo, then it will indeed set the mount to the wrong side in Park 1. The mount servo uses its internal time setting to determine which side the commanded Park will be. The keypad will calculate the Park 1 point to be 10 seconds before the Due North point according to its internal clock. Let's say that this RA point is 21hrs 59 min 50 seconds. This then is the RA data that gets sent to the servo. However, you must understand that 11 seconds later, this RA point will be on the East side of the mount. Now, if the servo has an internal time 11 seconds later than the keypad (because you sent a different time to the servo via ASCOM at some time during your session), then this RA point will be interpreted by the servo to be on the east side. Do you understand this? The servo has no choice but to respond to your commands, whatever they may be, right or wrong. What I am trying to say to you is this: The mount is NOT PARKING WRONG. The mount is doing exactly what you commanded it to do. If you always want the mount to park correctly then you must always use the same time base for everything. The best way is to NOT SEND to the mount another time base. Rolando ************** Play online games for FREE at Games.com! All of your favorites, no registration required and great graphics – check it out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001) [Non-text portions of this message have been removed]
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing in...
Roland Christen
In a message dated 10/28/2008 10:03:52 AM Central Daylight Time,
richard.kinsey@... writes: Rolando, thanks for explaining that. I have found the relevantThere is no reason to send site information to the mount from ASCOM. The mount's own keypad has all the correct information in its memory and if you use Autostart Yes, it will do a bangup job of starting the mount and parking it on the correct side. No need to use Get Time From Mount, etc. Some time down the road, AP will make the new control paneel available with built-in ASCOM that does work. Right now there are problems with using ASCOM to control the startup of the mount. Please understand that you can do 100% of the control of the mount via any external program, but the startup function should be left to the keypad, unless you really know what you are doing. Leave the keypad set to Autostart YES and you will be fine. I will let Howard explain further. Howard is our mount control expert and knows all the ins and outs of Pulse Guide, ASCOM and the new AP control program for contolling the mount from your laptop. Rolando ************** Play online games for FREE at Games.com! All of your favorites, no registration required and great graphics – check it out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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Re: AP1200 Park position no.1 reversed
Roland Christen
In a message dated 10/28/2008 9:57:12 AM Central Daylight Time,
richard.kinsey@... writes: Rolando, thanks for your reply. Can you please tell me where the ExtThere are 3 settings in the keypad under Keypad options: "Autostart No", "Autostart Yes" and "EXT". Please use "Autostart Yes" for all fixed location operations, Autostart No for setup in the field and EXT for all remote operations. Rolando ************** Play online games for FREE at Games.com! All of your favorites, no registration required and great graphics – check it out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001) [Non-text portions of this message have been removed]
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Re: AP1200 Park position no.1 reversed - ASCOM driver showing incorr...
Roland Christen
In a message dated 10/28/2008 9:49:29 AM Central Daylight Time,
richard.kinsey@... writes: Rolando, I have used the Get Time From Mount option on the keypad andWhen you use "Get Time From Mount" in the keypad, then you have set the keypad to EXT. From then on, you no longer have the keypad in control and really should not use any of the keypad functions, except for the direction buttons. Rolando ************** Play online games for FREE at Games.com! All of your favorites, no registration required and great graphics – check it out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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Re: Tungsten Disulphide Coating
Roland Christen
In a message dated 10/28/2008 5:02:33 AM Central Daylight Time,
astrogroups@... writes: I reckon you could get similar improvements to the 'low end' mountsIf you read the information carefully, the reduction of PE is due to their modification and blueprinting of the worm. By the looks of it, the worm is measured on a gear tester and probably hand filed to reduce the runout of the bearing journals. This is the biggest contributer to periodic error. Adding the lubricant only allows the gears to be pressed closer together without binding up, which might reduce the backlash in Dec. This would help autoguiding. RA backlash has no effect on autoguiding. Rolando ************** Play online games for FREE at Games.com! All of your favorites, no registration required and great graphics – check it out! (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir= http://www.games.com?ncid=emlcntusgame00000001)
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