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Re: two new shots form last session
marcolorenzi70
Thank you very much for your comments Rolando! Cannot comment yours but actually my skies are far to be dark, I took those pics from the hill around my hometown with a sky quite bad. In OIII in particular I had to expose a lot (240 minutes) and also to pass several noise reduction routines to be able to recover something of the external halo (very faint indeed) so the result is not so detailed.. but I willing to send you my original OIII fits to add to your exposures if you want ;)
Clear Skies Marco PS your Mach1 has an outstanding tracking :D ________________________________ Da: "chris1011@..." <chris1011@...> A: ap-gto@... Inviato: Domenica 19 ottobre 2008, 23:53:31 Oggetto: Re: [ap-gto] two new shots form last session In a message dated 10/18/2008 6:15:31 AM Central Daylight Time, marcolorenzi70@ yahoo.it writes: http://astrosurf. com/lorenzi/ ccd/m33_ccd. htmVery nice results. Apparently you have clearer skies than we do around here. Even with my narrow band filters I was not able to capture the full extent of the blue parts of NGC6888 the way you did. Rolando ************ ** New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & more. Try it out (http://local. mapquest. com/?ncid= emlcntnew0000000 2) [Non-text portions of this message have been removed] __________________________________________________ Do You Yahoo!? Poco spazio e tanto spam? Yahoo! Mail ti protegge dallo spam e ti da tanto spazio gratuito per i tuoi file e i messaggi http://mail.yahoo.it [Non-text portions of this message have been removed]
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Re: two new shots form last session
Roland Christen
In a message dated 10/18/2008 6:15:31 AM Central Daylight Time,
marcolorenzi70@... writes: http://astrosurf.com/lorenzi/ccd/m33_ccd.htmVery nice results. Apparently you have clearer skies than we do around here. Even with my narrow band filters I was not able to capture the full extent of the blue parts of NGC6888 the way you did. Rolando ************** New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & more. Try it out (http://local.mapquest.com/?ncid=emlcntnew00000002)
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Re: two new shots form last session
dan kowall
Excellent color on both images, Marco.
dan kowall _______ Marco Lorenzi <marcolorenzi70@...> wrote: Dear all, here are a couple shots from my last stay at home. The telescope used is my TEC140 mounted on a AP Mach1 german mount. These targets are very classics, unfortunately the weather was very unstable and had very few usable nights, never very crisp and with a crescent moon disturbing more day after day. Furthermore the camera was new (the FLI Proline 16803, upgraded from the Microline) so I just opted for two easy targets :) M33 is an HaLRGB of 4 hours and 25 minutes while NGC6888 is an HaOIII RGB with a total combined exposition of 7 hours and 20 minutes. I wanted recover better the OIII shell of the crescent but it is very dim and at the limit of my light polluted skies. Also such a large chip requires quite good flats to be flatted correctly and I am still try to improve my current ones, not very satisfied yet.. http://astrosurf.com/lorenzi/ccd/m33_ccd.htm http://astrosurf.com/lorenzi/ccd/ngc6888_ccd.htm Overall am happy with the two results, all the equipment works very well, can't wait to find a chance to test it under dark skies, hopefully this winter :) Kind Regards Marco __________________________________________________ Do You Yahoo!? Poco spazio e tanto spam? Yahoo! Mail ti protegge dallo spam e ti da tanto spazio gratuito per i tuoi file e i messaggi http://mail.yahoo.it __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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Re: New 900 GTO dec motor won't move.
chris provost <lineman_16735@...>
Thanks for the thoughts Joe. I did infact remove and reseat the y cable before I did anything else. No go but once I removed the gear, ran the motor, and reinstalled the gear all is just dreamy again. I'm gonna worry less and image more.
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After years of dealing with lesser mounts, LXD 75, G-11, NJP it was refreshing to say the least to post a problem on this group and get immediate advice from Roland. I was some what reluctant to sell my NJP when my name was called for the 900. The specs are very much the same but the remote abilities of the AP 900 are much better. I can see now I made the right choice as even though the 900 cost much more than the NJP it is more robust and the customer service from notification to present day has been nothing less than stellar (pun intended). Also FWIW the 900 tracks nearly twice as well as the NJP I had and the NJP is no slouch! Chris
--- On Sat, 10/18/08, Joseph Zeglinski <J.Zeglinski@...> wrote:
From: Joseph Zeglinski <J.Zeglinski@...> Subject: Re: [ap-gto] New 900 GTO dec motor won't move. To: ap-gto@... Date: Saturday, October 18, 2008, 1:53 AM Hi Chris, I wonder if it was a Y-cable seating problem, etc. When you removed the Y-cable for inspection, and put it back on, you might have solved the problem, or at least temporarily. If so, I would test it by slewing while jiggling portions of the Y-cable, to see if that causes a drop out and a motor stall. ----- Original Message ----- From: "chris provost" <lineman_16735@ yahoo.com> To: <ap-gto@yahoogroups. com> Sent: Friday, October 17, 2008 9:30 PM Subject: RE: [ap-gto] New 900 GTO dec motor won't move. Ok I removed the gear and the motor ran. The dec worm felt slightly stiff not too tight just a little more snug than I expected. I put the gear back on an everything is working fine now. Pheew! What could have caused this? Chris __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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Re: New 900 GTO dec motor won't move.
chris provost <lineman_16735@...>
Thanks for the explaination Rolando. My power supply is not suspect. Although I'm sure you have heard that many times before and it turned out to be the opposite:-) I noticed no debris at all inside the motor housing squeeky clean and super well made. I'm a bit perplexed at to what happened last night but everything seems fine now.
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It's worth mentioning that I ran Pempro last night and took about 8 worm cycles. My uncorrected PE is 3.63 arc seconds peak to peak which is very close to the AP loaded file. I'll be returning my couple month old AP 900 GTO to you as I want what I paid for! Your website specifically says 7 arc seconds peak to peak or less. I do not think half the PE I paid for is acceptable:-) How the hell do you folks do it? Thanks again for the quick response. Chris Provost
--- On Sat, 10/18/08, uncarollo2 <chris1011@...> wrote:
From: uncarollo2 <chris1011@...> Subject: [ap-gto] Re: New 900 GTO dec motor won't move. To: ap-gto@... Date: Saturday, October 18, 2008, 10:48 AM --- In ap-gto@yahoogroups. com, chris provost <lineman_16735@ ...> wrote: stiff not too tight just a little more snug than I expected. I put the gear back on an everything is working fine now. Pheew! What could have caused this? Could have had something stuck in the teeth of the gears which prevented them from turning. If the servo sees that the motor shaft is not turning, it goes into safe mode (motors are powered down). This prevents high current from being sent to the motor windings and prevents the expensive servo motor from being ruined. If the cable is bad in any way, one of two things will happen. The motor will not turn at all and make absolutely no noise if either of the two wires to the motor is open circuited. If any of the encoder wires is open circuit or shorted, the motor will run away very fast for about 1 second and then stop. In either case the red light on the servo will turn amber, which indicates that the servo is in safe mode and one of the motors is stalled or not turning. If the motor is bad, you can plug the cable from this motor into the other motor (they are both the same), and check out the servo and cable. For instance, if you suspect a bad motor in RA, simply plug the RA cable into the Dec circuit and the Dec cable into the RA circuit. If the RA motor still does not respond to your button pushes, then it is probably bad. (we have had very few motor failures in the past 15 years, so this is quite unlikely). The most likely reason a motor will satll is that the power supply cannot provide enough current or voltage to turn the motor at the commanded speed. Check your supply first before doing anything else. Also check the power cord at the servo end and at the supply end to see if the wires are solidly connected. A frayed power cord or poor connection can cause motor stall also. Rolando __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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Re: two new shots form last session
S HEGGIE <stuart.j.heggie@...>
Marco, I love both these shots but the 6888 is to my eye outstanding!
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Stuart
From: Marco Lorenzi <marcolorenzi70@...>
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Re: New 900 GTO dec motor won't move.
Roland Christen
--- In ap-gto@..., chris provost <lineman_16735@...> wrote:
stiff not too tight just a little more snug than I expected. I put the gear back on an everything is working fine now. Pheew! What could have caused this? Could have had something stuck in the teeth of the gears which prevented them from turning. If the servo sees that the motor shaft is not turning, it goes into safe mode (motors are powered down). This prevents high current from being sent to the motor windings and prevents the expensive servo motor from being ruined. If the cable is bad in any way, one of two things will happen. The motor will not turn at all and make absolutely no noise if either of the two wires to the motor is open circuited. If any of the encoder wires is open circuit or shorted, the motor will run away very fast for about 1 second and then stop. In either case the red light on the servo will turn amber, which indicates that the servo is in safe mode and one of the motors is stalled or not turning. If the motor is bad, you can plug the cable from this motor into the other motor (they are both the same), and check out the servo and cable. For instance, if you suspect a bad motor in RA, simply plug the RA cable into the Dec circuit and the Dec cable into the RA circuit. If the RA motor still does not respond to your button pushes, then it is probably bad. (we have had very few motor failures in the past 15 years, so this is quite unlikely). The most likely reason a motor will satll is that the power supply cannot provide enough current or voltage to turn the motor at the commanded speed. Check your supply first before doing anything else. Also check the power cord at the servo end and at the supply end to see if the wires are solidly connected. A frayed power cord or poor connection can cause motor stall also. Rolando
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Awesome AP1200
My recently-acquired AP1200 is now installed in the observatory, and
I've had a chance to check it out with the ACP automation software. I am EXTREMELY impressed! After a slew to almost any part of the sky, ACP plate-solves an image and reports the pointing error, then slews the mount slightly to center the target on the camera chip. Typically, the pointing error is only a few arc minutes, and after the correction slew the target star appears DEAD-CENTER in the Maxim crosshairs. It is awesome to realize that the AP1200 just slewed just several arc minutes with that kind of accuracy. I break into a big smile every time I recall these results. Finally, after years of struggling with lesser mounts, I'm seeing performance I've only dreamed about. In the parlance of the USA's current election campaign, the AP1200 is "The One." :-) It provides the accuracy and rigidity necessary for fully-automated imaging. The AP1200 is great! I'm eagerly anticipating the winter the imaging season. Mike ----- Mike Dodd Montpelier, VA USA http://astronomy.mdodd.com
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two new shots form last session
marcolorenzi70
Dear all, here are a couple shots from my last stay at home. The telescope used is my TEC140 mounted on a AP Mach1 german mount.
These targets are very classics, unfortunately the weather was very unstable and had very few usable nights, never very crisp and with a crescent moon disturbing more day after day. Furthermore the camera was new (the FLI Proline 16803, upgraded from the Microline) so I just opted for two easy targets :) M33 is an HaLRGB of 4 hours and 25 minutes while NGC6888 is an HaOIII RGB with a total combined exposition of 7 hours and 20 minutes. I wanted recover better the OIII shell of the crescent but it is very dim and at the limit of my light polluted skies. Also such a large chip requires quite good flats to be flatted correctly and I am still try to improve my current ones, not very satisfied yet.. http://astrosurf.com/lorenzi/ccd/m33_ccd.htm http://astrosurf.com/lorenzi/ccd/ngc6888_ccd.htm Overall am happy with the two results, all the equipment works very well, can't wait to find a chance to test it under dark skies, hopefully this winter :) Kind Regards Marco __________________________________________________ Do You Yahoo!? Poco spazio e tanto spam? Yahoo! Mail ti protegge dallo spam e ti da tanto spazio gratuito per i tuoi file e i messaggi http://mail.yahoo.it
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Re: New 900 GTO dec motor won't move.
Joe Zeglinski
Hi Chris,
toggle quoted messageShow quoted text
I wonder if it was a Y-cable seating problem, etc. When you removed the Y-cable for inspection, and put it back on, you might have solved the problem, or at least temporarily. If so, I would test it by slewing while jiggling portions of the Y-cable, to see if that causes a drop out and a motor stall.
----- Original Message -----
From: "chris provost" <lineman_16735@...> To: <ap-gto@...> Sent: Friday, October 17, 2008 9:30 PM Subject: RE: [ap-gto] New 900 GTO dec motor won't move. Ok I removed the gear and the motor ran. The dec worm felt slightly stiff not too tight just a little more snug than I expected. I put the gear back on an everything is working fine now. Pheew! What could have caused this? Chris
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Meridian delay think you...
Christopher Vedeler <vedeler@...>
I've been planing out my next dark sky astrophotography adventure for next weekend and I came across a problem switching from M45 to the Horsehead at 2:00AM. I wanted to shoot until astronomical dawn (about 5:00AM), but the problem is that at 2:00AM when I wanted to start shooting, the Horsehead is almost 2 hours East of the meridian. I want to be able to let the scope track worry free while I get some sleep. I didn't want to have to do a meridian flip, especially while I was dreaming of 10" AP Maks at 3:45AM.
Then it occurred to me. I have an AP900 and I can start the exposure with the scope rotated 2 hours upside down with a meridian delay! Then I can sleep worry free and wake up leisurely after sunrise to turn off the mount without worrying about the scope hitting the pier. Thanks AP for making it possible to get some worry free sleep while still capturing data late, late at night. Chris Vedeler
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Re: New 900 GTO dec motor won't move.
chris provost <lineman_16735@...>
Ok I removed the gear and the motor ran. The dec worm felt slightly stiff not too tight just a little more snug than I expected. I put the gear back on an everything is working fine now. Pheew! What could have caused this?
toggle quoted messageShow quoted text
Chris
--- On Fri, 10/17/08, Marj <marj@...> wrote:
From: Marj <marj@...> Subject: RE: [ap-gto] New 900 GTO dec motor won't move. To: ap-gto@... Date: Friday, October 17, 2008, 8:38 PM Remove the motor cover. Remove the large gear with a screw driver. Try running the motor with this gear removed. If it runs, then turn off power, put the gear back on and try turning it with your hand. If it feels very hard to turn, you may have your worm way too tight in mesh. Rolando Marj Christen Vice President Astro-Physics, Inc 11250 Forest Hills Road Machesney Park, IL 61115 Phone: 815-282-1513 Fax: 815-282-9847 www.astro-physics. com Please include this e-mail with your response. ____________ _________ _________ __ From: ap-gto@yahoogroups. com [mailto:ap-gto@yahoogroups. com] On Behalf Of chris Sent: Friday, October 17, 2008 7:26 PM To: ap-gto@yahoogroups. com Subject: [ap-gto] New 900 GTO dec motor won't move. Of course it's clear tonight:-( My 900 GTO is from the run. I spent some time today observing the sun and had no problems. I just wen't out to the observatory to start an imaging session. When I tried to slew nothing happens. I shut down and restarted still no change. Then I checked the status and it says motor stall. My power supply is just fine and I even tried another ac/dc convertor. So I shut down and restarted again and the mount moves just fine in RA but in dec I hear a strange noise from the motor and then nothing, no movement. I just brought the y cable indoors to check to see if there is a problem but I doubt it as there was no problem 7 hours ago? I hope someone has a magic pill for me:-) Chris __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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Re: New 900 GTO dec motor won't move.
chris provost <lineman_16735@...>
BTW I meant to say my 900 GTO is from the last run. I left out last in my initial post.
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Chris
--- On Fri, 10/17/08, Marj <marj@...> wrote:
From: Marj <marj@...> Subject: RE: [ap-gto] New 900 GTO dec motor won't move. To: ap-gto@... Date: Friday, October 17, 2008, 8:38 PM Remove the motor cover. Remove the large gear with a screw driver. Try running the motor with this gear removed. If it runs, then turn off power, put the gear back on and try turning it with your hand. If it feels very hard to turn, you may have your worm way too tight in mesh. Rolando Marj Christen Vice President Astro-Physics, Inc 11250 Forest Hills Road Machesney Park, IL 61115 Phone: 815-282-1513 Fax: 815-282-9847 www.astro-physics. com Please include this e-mail with your response. ____________ _________ _________ __ From: ap-gto@yahoogroups. com [mailto:ap-gto@yahoogroups. com] On Behalf Of chris Sent: Friday, October 17, 2008 7:26 PM To: ap-gto@yahoogroups. com Subject: [ap-gto] New 900 GTO dec motor won't move. Of course it's clear tonight:-( My 900 GTO is from the run. I spent some time today observing the sun and had no problems. I just wen't out to the observatory to start an imaging session. When I tried to slew nothing happens. I shut down and restarted still no change. Then I checked the status and it says motor stall. My power supply is just fine and I even tried another ac/dc convertor. So I shut down and restarted again and the mount moves just fine in RA but in dec I hear a strange noise from the motor and then nothing, no movement. I just brought the y cable indoors to check to see if there is a problem but I doubt it as there was no problem 7 hours ago? I hope someone has a magic pill for me:-) Chris __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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Re: New 900 GTO dec motor won't move.
chris provost <lineman_16735@...>
Thanks for replying so quickly. I removed the motor cover and could easily turn the gear by hand it was silky smooth. I did not remove the large gear or try run the motor with the gear removed. Do you think I should still try that? I just inspected the dec cable solder joints and they look to be in great shape.
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Chris Provost
--- On Fri, 10/17/08, Marj <marj@...> wrote:
From: Marj <marj@...> Subject: RE: [ap-gto] New 900 GTO dec motor won't move. To: ap-gto@... Date: Friday, October 17, 2008, 8:38 PM Remove the motor cover. Remove the large gear with a screw driver. Try running the motor with this gear removed. If it runs, then turn off power, put the gear back on and try turning it with your hand. If it feels very hard to turn, you may have your worm way too tight in mesh. Rolando Marj Christen Vice President Astro-Physics, Inc 11250 Forest Hills Road Machesney Park, IL 61115 Phone: 815-282-1513 Fax: 815-282-9847 www.astro-physics. com Please include this e-mail with your response. ____________ _________ _________ __ From: ap-gto@yahoogroups. com [mailto:ap-gto@yahoogroups. com] On Behalf Of chris Sent: Friday, October 17, 2008 7:26 PM To: ap-gto@yahoogroups. com Subject: [ap-gto] New 900 GTO dec motor won't move. Of course it's clear tonight:-( My 900 GTO is from the run. I spent some time today observing the sun and had no problems. I just wen't out to the observatory to start an imaging session. When I tried to slew nothing happens. I shut down and restarted still no change. Then I checked the status and it says motor stall. My power supply is just fine and I even tried another ac/dc convertor. So I shut down and restarted again and the mount moves just fine in RA but in dec I hear a strange noise from the motor and then nothing, no movement. I just brought the y cable indoors to check to see if there is a problem but I doubt it as there was no problem 7 hours ago? I hope someone has a magic pill for me:-) Chris [Non-text portions of this message have been removed] __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com [Non-text portions of this message have been removed]
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Re: New 900 GTO dec motor won't move.
chris provost <lineman_16735@...>
Thanks for replying so quickly. I removed the motor cover and could easily turn the gear by hand it was silky smooth. I did not remove the large gear or try run the motor with the gear removed. Do you think I should still try that? I just inspected the dec cable solder joints and they look to be in great shape.
toggle quoted messageShow quoted text
Chris Provost
--- On Fri, 10/17/08, Marj <marj@...> wrote:
From: Marj <marj@...> Subject: RE: [ap-gto] New 900 GTO dec motor won't move. To: ap-gto@... Date: Friday, October 17, 2008, 8:38 PM Remove the motor cover. Remove the large gear with a screw driver. Try running the motor with this gear removed. If it runs, then turn off power, put the gear back on and try turning it with your hand. If it feels very hard to turn, you may have your worm way too tight in mesh. Rolando Marj Christen Vice President Astro-Physics, Inc 11250 Forest Hills Road Machesney Park, IL 61115 Phone: 815-282-1513 Fax: 815-282-9847 www.astro-physics. com Please include this e-mail with your response. ____________ _________ _________ __ From: ap-gto@yahoogroups. com [mailto:ap-gto@yahoogroups. com] On Behalf Of chris Sent: Friday, October 17, 2008 7:26 PM To: ap-gto@yahoogroups. com Subject: [ap-gto] New 900 GTO dec motor won't move. Of course it's clear tonight:-( My 900 GTO is from the run. I spent some time today observing the sun and had no problems. I just wen't out to the observatory to start an imaging session. When I tried to slew nothing happens. I shut down and restarted still no change. Then I checked the status and it says motor stall. My power supply is just fine and I even tried another ac/dc convertor. So I shut down and restarted again and the mount moves just fine in RA but in dec I hear a strange noise from the motor and then nothing, no movement. I just brought the y cable indoors to check to see if there is a problem but I doubt it as there was no problem 7 hours ago? I hope someone has a magic pill for me:-) Chris [Non-text portions of this message have been removed] __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com [Non-text portions of this message have been removed]
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Re: New 900 GTO dec motor won't move.
Remove the motor cover. Remove the large gear with a screw driver. Try
running the motor with this gear removed. If it runs, then turn off power, put the gear back on and try turning it with your hand. If it feels very hard to turn, you may have your worm way too tight in mesh. Rolando Marj Christen Vice President Astro-Physics, Inc 11250 Forest Hills Road Machesney Park, IL 61115 Phone: 815-282-1513 Fax: 815-282-9847 www.astro-physics.com Please include this e-mail with your response. ________________________________ From: ap-gto@... [mailto:ap-gto@...] On Behalf Of chris Sent: Friday, October 17, 2008 7:26 PM To: ap-gto@... Subject: [ap-gto] New 900 GTO dec motor won't move. Of course it's clear tonight:-( My 900 GTO is from the run. I spent some time today observing the sun and had no problems. I just wen't out to the observatory to start an imaging session. When I tried to slew nothing happens. I shut down and restarted still no change. Then I checked the status and it says motor stall. My power supply is just fine and I even tried another ac/dc convertor. So I shut down and restarted again and the mount moves just fine in RA but in dec I hear a strange noise from the motor and then nothing, no movement. I just brought the y cable indoors to check to see if there is a problem but I doubt it as there was no problem 7 hours ago? I hope someone has a magic pill for me:-) Chris
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New 900 GTO dec motor won't move.
chris <lineman_16735@...>
Of course it's clear tonight:-( My 900 GTO is from the run. I spent
some time today observing the sun and had no problems. I just wen't out to the observatory to start an imaging session. When I tried to slew nothing happens. I shut down and restarted still no change. Then I checked the status and it says motor stall. My power supply is just fine and I even tried another ac/dc convertor. So I shut down and restarted again and the mount moves just fine in RA but in dec I hear a strange noise from the motor and then nothing, no movement. I just brought the y cable indoors to check to see if there is a problem but I doubt it as there was no problem 7 hours ago? I hope someone has a magic pill for me:-) Chris
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Re: Nope, it cant be done... : )
hewholooks
Mike,
Ray is obviuosly the expert, but I will tell you that when PHD issues commands to the Mach1 (which is GTOCP3, I believe), the direction, distance, and duration of command is displayed at the bottom of the PHD screen. I was going to send a screen capture of the commands, but the screen captures I have are so smooth, there's no commands! ;-) http://tinyurl.com/4cwxw5 Sorry about that, but it really does display all those things. Hunter --- In ap-gto@..., "Mike" <mike@...> wrote: earlierHi Mike,issued with a thisseparate start/stop commands must be sent. In most cases doing stillwill be very accurate, but it depends on your PC.
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Re: Nope, it cant be done... : )
Ray Gralak <rgr@...>
Hi Mike,
Mike wrote: Ray wrote:When PHD makes a call to the PulseGuide() function in the ASCOM API aIf you have a GTOCP3 controller the Pulse Guiding commands areissued with aduration built into the move command so they should be at least asaccurateas the ST4 (and perhaps more accurate). If you have a GTOCP2 orcases doing direction and duration are passed as parameters. When the ASCOM driver (in this case the Command Center) receives the command it will choose the best movement technique for the controller. i.e. For the GTOCP3 it will send the move command with embedded duration. For previous controllers a discrete start movement command is sent, then a delay of the appropriate duration, followed by a discrete stop movement command. -Ray
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Re: Nope, it cant be done... : )
Mike C
Hi Mike,issued with a duration built into the move command so they should be at least asaccurate as the ST4 (and perhaps more accurate). If you have a GTOCP2 or earlierstill will be very accurate, but it depends on your PC. Hello Ray, thats up to the guider app though, right? i.e. PHD guider probably doesn't detect my GTOCP3 and therefore send durations? Mike
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