Last updated: 28 June 2003 |
Subject: Plastic Backing on LXD55 Primary Mirror Sent: Friday, June 27, 2003 06:06:01 From: "Bob Fandrich" (grumpabob@hotmail.com) Maybe I'm not careful enough, but I removed the plastic disk behind the primary mirror on my LXD55 10"SN completely. I really can't see any reason for it. One advantage for people who worry if they have UHTC, it is stamped on the back of the mirror. Grump 28°0037N, 80°3758W 1. SN10UHTC 2. Rotating Ring 3. Solid Dovetail 4. Red-dot Finder 5. Step-motor Focuser 6. Stiff-as-a-Brick Tripod 7. Solid-Elevation Bearing 8. Piggyback Camera Mount 9. Bearings Added to LXD55 Mount 10. DGM Optics 9 Off-Axis Newtonian Dob
Subject: lxd-55 5" achromat Sent: Wednesday, June 25, 2003 08:10:42 From: DENNNISS@aol.com I had a question for those who own this scope. What is the noise level of this scope during slewing? I had a lx-200 and it was loud enough to be uncomfortable to use late at night. Any other opinions on this scope are welcomed. Thanks, DennisMike here: Slewing motor volume depends on the slewing speed. At slower speeds (<5) it is fairly quite (on my LXD55-8"SC). It is only at the highest speeds (>7) that I think it is loud.
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Thanks a lot for the info. The lx-200 was the same way: fairly quiet a low speed, coffee grinder at high. Dennis
Subject: Observational guides and references update Sent: Monday, June 23, 2003 15:10:18 From: "Lynn Laux" (gemmalady@msn.com) I believe I mentioned that the "Tours" would be a real plus at a public star party. This past Saturday I got a chance to use one of the tours to keep some folks entertained for several hours. I used the "Aquila" and Scorpius" tours. Since a refractor does such a nice job on splitting doubles as well as deep sky objects these tours gave both the public and myself (!) a chance to look at some interesting doubles, variable stars, clusters and DSO's. It was handy to read off the data such as separation, magnitude and the like. I could vary the EP's too to give folks (and myself) a real treat, and of course AS calculates FOV and magnification easily. The public always wants to know that. It was cool to point to a place in the sky then have them look into the EP! Then last night I took a tour for myself of Lyra and Ursa Major. The tours really give you a balanced, yet in depth view of a particular patch of sky. If there is something you aren't interested in, simply hit the mode key and the tour automatically moves you to the next item. I like that, too. (For example, to do variable stars any kind of justice, one would have to keep looking at them over the course of several days or weeks to keep track of changes). These two tours kept me busy until Mars came up over the trees! Still impressed! Lynn Laux
Subject: Illuminated eyepiece polarity? Sent: Sunday, June 22, 2003 08:44:42 From: Goran Hosinsky (ea8yu@arrl.net>) I bought one of the Meade cross hair illuminated eyepieces with cable for my LXD55. Found out that they are meant for the LX200 series which has an connector on the GEM for the eyepiece illumination, and there was no information in the box on how to connect them to a separate power supply. The voltage I can find out by testing, starting low down, but I do not know what polarity to use on the connector, which is a mono earphone connector, and I am afraid to burn something out if I use the wrong polarity. The cable is black and has one side marked with a white line. Can you help me resolve this question? Greetings from La Palma GoranAnd an update:
I managed to measure the Meade reticule EP so no need for you to post it on the web site. If somebody else needs the information: Top of the mono earphone plug is positive Need maximum 5-6 mA Voltage drop over the led 1.7 V Saludos Goran
Subject: re: extension cords (LXD55) Sent: Saturday, June 21, 2003 22:11:50 From: Dick SeymourTo: dcanard@cswnet.com I just noticed your note on Mike's site. The power plug for the Meade telescopes is 5.5mm outside, 2.5mm inside, center positive. (not 3.5 as your note mentioned). Be warned that a 6.1 mm plug will -fit-, but will permanently damage the socket's internal switch (not a problem with the LXD55, but a problem with any of the internal-battery models). I really, really do NOT recommend alligator clips for this kind'a thing.. you'll be plugging it in the dark, when you're tired. A sure combination leading to reversed polarities and smoked telescope electronics. The Autostar reportedly is usually happy with a 50 foot cord. Pinout is -not- the same as a computer network cable, so check Mike's Tech Tips page carefully. good luck --dick
Subject: Problems with My new LXD 55 10 inch scope Sent: Saturday, November 9, 2002 20:23:11 From: "Walter Ness" (walter.ness@3web.net) Just to let you know Mike. I just received my LXD 55 10 inch scope and it took 4 months to get it. The dealer I bought through rattled some chains at Meade and it arrived 1 week after he did that. Anyway, back to the interesting stuff. When I took it out of the packaging and inspected the tube I noticed that they had a Quality Assurance sticker on the scope and it was signed. Good for them. Well when I picked it up and inspected the optics by looking through the end and down at the primary mirror I was shocked to say the least at what I saw. Debris and lots of it. It looked like the bottom of a garbage can. All over the primary mirror. Well I got on the phone right away to Meade tech support and asked them if I could take off the end and try to gently shake it out. They informed me to not remove the mirror and I told them I had only intended to take the end off and that was it. So I marked one of the screws on the end cover (side where light is collected - the corrector) so that I would know exactly how to put it back on after I cleaned out the debris in the tube and on the mirror. Took off the corrector and placed it very carefully aside and proceeded to shake very carefully the tube so that debris would come out. Well 4 pieces of a black substance came out and the one was almost an inch long. They were pieces of a rubber foam and I believe this is used to help cushion and secure the primary mirror to the clips holding it in. These pieces were left in the tube and it was QA passed. Well I thought I was in the clear and proceeded to put the corrector back on the end and after I put it back on of course I missed some. So I said the hell with this. I decided to take off the primary mirror end of the tube (not touching the mirror or its fastenings). Took it off and inspected and blew off the primary mirror (thank goodness no scratches). Little pieces of black were all over the primary mirror but I managed to clear them off. Took a flash light and inspected the tube. Could not believe what I was seeing. Shavings of metal were stuck on the sides it well into the tube, plus more black foam rubber. I had a camel brush so I was able to clear it out and I put the end back on. Well this time I put used to pencil to mark the one screw so I would know how to position the end on again. The only problem is the pencil was kind of smeared on the white tube where the screw is placed and especially on the end I took off. I carefully examined on holes in the end (primary mirror side) and determined the correct location for the screw to line it back up again with the tube. The only reason why I went ahead and did all this was because I know it would cost $$$ and may take a very long time to get the scope back from Meade if I sent it in. Anyway, all the debris is gone and there are no flaws or scratches in the mirrors. Sorry for the long winded message but here finally comes my question. I had to take the scope out to align the view finder with a terrestrial object (power line pole) and was able to do it no problem. Now I had an ETX 125 and it of course it was a Schmidt Cassigrain style while the LXD 55 10 inch is a Schmidt Newtonian. Totally different. Now when I was lining up the LXD I noticed a huge obstruction when viewing. Mind you I was using the 26 mm eyepiece that came with the scope and looking at a terrestrial object during the day that was about 3/4 mile away. But there was a good size dark spot even though I was able to see around it crystal clear. This type of scope has the obstruction in the middle of the lens ( the diagonal mirror fixture) where the image collected from. So my question is does my collimation have to be adjusted and on which, the primary mirror or diagonal mirror? Would this get rid of the dark circle or blind spot caused by the diagonal mirror mount in the middle of the corrector lens? Thanks Mike.Mike here: Sorry to hear about the initial problem. I hope you let your dealer know. As to the "shadow" of the secondary mirror, that is normal with some eyepieces when focusing at close distances. This can also happen with the ETX "Maksutov-Cassegrain" design. Have you tried focusing on the Moon (morning object right now) or something else in the night sky? As to collimation, you can do a "star test" to check it and recollimate if necessary (see the manual).
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I was out last night looking at the stars with my new LXD 55 10 inch scope with the 26mm eyepiece that came with the scope. The dark spot still showed up but much more faintly. I was able to see stars inside it but you could still see the dark spot behind the stars. During the day I held my hand on the corrector plate cover (the one that covers the collimation screws for the diagonal or secondary mirror) and that was causing the dark spot which makes sense because the light that collects through the corrector can't penetrate that object (secondary mirror mount) and the dark spot shows up. Now does collimation compensate for that? Also, I read that if I increase my magnification by using a more powerful eye piece it removes this dark spot. I never had this sort of problem with my ETX 125. Of course, its a different design. And does it ever work differently then the ETX I had. I think it may take a while to get used to. Oh, and I told my dealer and he said I should have taken a picture of the debris inside the tube so he could send it back to Meade's upper management. I guess to maybe point out a quality control issue they may be having. Look forward to hearing from you.Mike here: I've not looked through a 10"SN but it seems likely that the short focal length of the SN is probably the culprit. I don't think being out of collimation (unless really bad) would add or detract from that.
Subject: LXD55-8 Mirror Cell Mod(s) Sent: Friday, June 20, 2003 22:52:00 From: "SKYGZR" (skygzr@opusnet.com) I have my scope completely apart. Awaiting Do it one's self Hyper Tune Kit from Richard, Focuser (w/moto) from JMI (FYI-JMI called me and they are reworking the moto-focus to allow manual focusing along with the moto), Flock "paper" from ProtoStar, also did the "leg mod" (per Warped), etc.. Anyway, what are your thoughts re drilling (3) holes, aprx. 1.5" in dia. through the plastic "backing" plate attached to the cell, in order to assist in "cool down" for the mirror? Since this really isn't a "closed" system (gaps in the construction of the cell itself), you see any possible concerns? (besides "dust / dirt" intrusion). I have posted this, along with a couple mods already done on Richards site. P.S. Do you have the "Alignment Arrows" file? I've downloaded the OPTCORP Hints file, the templates for the primary, secondary and arrows, yet without the actual "file" I can't print them out. Warped mentioned they are available in the files section on the lxd55telescope yahoo group, yet I can't find 'em. Thanks, Tom Logan Scappoose,ORMike here: I'm possibly overly cautious but I would worry about affecting overall performance by making such a mod. Since optics "system" includes the mounting, you might cause problems down the road. Allowing for a regular cool-down period seems like a safer approach. As to the files, sorry, I don't have them.
Subject: RE: Saddle Damage on LXD55 Mount Sent: Friday, June 20, 2003 15:07:53 From: "David Filipowski" (nagognog007@australia.edu) It is true that the saddle, or dovetail bar, on the LXD55 mount is made out of pot metal and is prone to breakage. However ScopeStuff offers a much tougher replacement bar for sale, as well as heavy duty replacement bolts/knob. Here is their address: http://www.scopestuff.com/ And ScopeStuff has a wealth of other aftermarket goodies for the LXD55 mount, as well as many other scopes and mounts. A paradise for an upgrade-nut like myself! Clear Skies, Dave Filipowski Burlington, Vermont
Subject: Observational Guides and references Sent: Wednesday, June 18, 2003 17:02:41 From: "Lynn Laux" (gemmalady@msn.com) In searching for something meaningful to do when the skies finally clear here in the NE I stumbled across these guides on ASO...andthe linksent me here. I couldn't believe the wealth of information loaded into these guides! Here in Ohio in the summer it seems like Hercules, Cygnus, Sagitta, Sagittarius, Scorpio, Ophiuchus, Aquilaand the like are in the sky for a long time...and one runs out of interesting things to look at after a while (not really, but you know what I mean, I think). In other words, I was delighted to find a guide to viewingsome the wonders in each of these constellations in an organized fashion. Every year I look at the same 'old' ones: M57, M13, etc, etc and I was gratified to see quite a few more objects that I could view over the course of an evening! I particularly like the text that goes along with them, and the detailed star maps. I also downloaded for my AS the tours that go with each. I printed out the guides and put them into a binder so that I can read along as I look at them...way cool. Additionally, for public star parties these will be a real plus! I am learning what the AS is capable of, and this is just one more selling point in its favor!! Thank Dr. Clay and also those who wrote the tours!! Now if the skies would just clear! Regards, Lynn Laux
Subject: Extension cords Sent: Sunday, June 15, 2003 17:51:49 From: doug canard (dcanard@cswnet.com) Oh yeah, before I get back to the virtual tour of Meade's manufacturing facility, { man, I'd love to be a fly on the wall there }, I was wondering if anyone has made an extension cord for the Autostar handcontroller up to, say, 50 or 75 feet? If possible, are the male/female connectors on the mount and controller something common that I could get at Radio Shack or elsewhere? Also, I am thinking of using a lawn/garden battery for like lawnmowers and such to power my setup. Are the male/female external power plugs also a common thing? I already have a power cord with alligator clips on one end and {I think} a 3.5 mm male plug on the other end. I'm wondering if maybe I'm already good to go in that regards? I'm guessing that the center tip is positive like on my CCD cam? Appreciate it, DougMike here: The plugs are common parts (phone or computer network). You could find connectors at Radio Shack or other electronics stores. For more on cables see the Autostar Information page. As to power supply information, see the Telescope Tech Tips page on my ETX Site. And yes, the center pin is positive.
Subject: Cleaning Corrector Plate Sent: Friday, June 13, 2003 11:57:53 From: Thomas Rutherford (rutherfordt@earthlink.net) Last night at my local astronomy club meeting, things dewed up quickly, including the corrector plate on my SN-6 w/UHTC coatings. An older gentleman who was there took out his handkerchief (no, he didn't wipe the corrector, thank the stars!) and was fanning the corrector to drive off the dew (it didn't work). Apparently, a corner of the handkerchief brushed reapeatedly across the corrector as he was doing this. It does not look like it was scratched, but there are now numerous (20-30) "trails" of something (dirt?) across the plate. Can the plate be cleaned with alcohol and distilled water? My plan is to turn the scope face down so nothing will run into the scope and mist the plate with alcohol until it is well covered, then gently wash the alcohol off with distilled water. Any comments? I know that the UHTC coatings are somewhat fragile, so I have no plans to actually touch the plate. Thanks. Tom Rutherford Blountville, TennesseeMike here: See the Cleaning Tips article on the Buyer/New User Tips page on my ETX Site.
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Thanks for the quick reply. I found the Cleaning Tips after I sent my email to you. I should have looked more thoroughly before firing off a note to you. Tom Rutherford
Subject: 505 cable Sent: Thursday, June 12, 2003 10:16:46 From: "Gary Douglas" (gdouglas@thermalpipesystems.com) Great website. I was trying to make my own #505 connector cable. Is it neccessary to transition to a 6 pin cable or is it posible just to solder the 4 pin cable wires directly to DB9 connector? Thanks GaryMike here: As you can see from the article "Homemade Cable #505" on the Autostar Information page, you can wire directly.
Subject: photography Sent: Wednesday, June 11, 2003 08:11:54 From: paul perlmutter (pbpm45@yahoo.com) It's been a long time since i've contacted you for some info. I was impressed with your photos thru you're newscope and that you used a regular digital camera(well Nikon isn't a regualr one). I tries the SAC system without much success and a friend sold(at a price I couldn't resist) a SBIGSTV which I tried without any success. At present I own a 125ETX and 8" Meades LX200. Without getting really involved with getting a wedge and focal reducer for the Meade and or taking the eyepiece in and out for the SAC system focusing I would like to try something much easier. I developed Macular Degeneration in one eye last year so I do not wish to pile on any extra Astro equipement as I don't know what lies ahead for me with my vision. I enjoyed your photos and it seemed to be much easier and less envovled(and besides you don't need to take your computer along). It is working out well for you do use this way and if you have any advice I would appreicate it. Also, when you're not using the camera for astro stuff, it serves as a regular camera. That what I like, a 2fer. Paul PerlmutterMike here: Check out the Helpful Information --> Astrophotography page on my ETX Site. Lots of good 35mm, digital, and video camera info there. You can use really inexpensive digital cameras for some types of astrophotography (brighter objects like the Moon and with proper protection, the Sun, and even Jupiter, Saturn, Mars, and Venus). Or you can use more capable consumer digital cameras. Examples and tips/info linked from that page.
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Thanks for your ideas. I will check out the part on your site. I would like to do a little more than just easy stuff and liked your results with the coolpix. My experience with the SAC 7 and SBIG STV led me away from the more complicted photography. Paul
Subject: LXD-55 / guidance Sent: Monday, June 9, 2003 07:12:54 From: dwilliamson@sugar-land.oilfield.slb.com (Don Williamson) Just curious, has anyone looked into connecting an autoguider to a LXD-55 mount ? Also, do you know what the aux port on the LXD-55 control panel is for ?Mike here: Currently the Meade Autoguider that works on the LX90 doesn't work on the LXD55. Someday...
Subject: New Vendor Sent: Saturday, June 7, 2003 18:30:51 From: "Michael Carr" (mscarr@alltel.net) I recently stumbled upon your website while doing my weekly astronomy website hopping.Being that it is a site dedicated to LXD55 owners, I thought that I might submit a vendor that I have recently purchased some upgrades for my LXD55 SN-10.The website is www.scopestuff.com , and is based out of Round Rock, TX.The ownerJim Henson, and myself have spoken numerous times about various toys and upgrades he has to offer for the LXD55 line of telescopes.I can attest to the quality of the replacement equipment I have received from him, and being that his prices INCLUDE shipping he is very reasonable.He is also open to new ideas I have had a few ideas of my own that he has already made a reality for me; latitude bolts without the flippy things, secondary collimation thumb screws for the SN series, counterweight lock screws with rosette knobs.If you have, or plan to have vendor links for websites that support the LXD55 community, I believe this is one company that should be included on that page for the benefit of all of us! P.S.I have been a long time fan of your Mighty ETX website, I am also an ETX 105 owner! Thank you, Michael Carr Lexington,KY
Subject: lxd55 Sent: Wednesday, June 4, 2003 09:48:59 From: John.Iannelli@aheadcomusa.com (John Iannelli) I have an LXD55 SC-8. The Ra axis has about a 1/4 inch of play on when locked. Ithink this is too much play. I contacted Meade Customer service and they walked me through the procedure of checking and tightening the Ra and Dec gears. This did not correct the problem. They advised me to send it back to the factory. Before I do that is there anything else I should check or adjust? The play that is there cannot be good over time. Any help would be appreciated. The mount is under warranty. Thanks. John Iannelli Middlebury Ct.Mike here: What exactly did they tell you to do?
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They told me to take the inspection covers off of the Ra motor and check to see if the gold gear was loose. It was. They said to tighten the gold gear up with the allen wrench supplied. I also did the same for the Dec motor gears. After that was completed I still had the play in the Ra axis. Thats when they told me that there may be something internal that is causing the problem and I would have to send it back to the factory. Thanks.Mike here: Was the setscrew tightened against the flat side of the shaft?
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If you mean the set screw that's recessed just below the polar alignment site lens were the mount swivels, yes.Mike here: I mean the gears inside the DEC drive housing and inside the RA drive housing. Those are the ones that can be seen through the inspection ports. See my article on fixing a slipped RA gear on the LXD55 site for what I'm talking about.
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The answer is yes to the question then. Those were the gears that the Meade rep told me to tighten. Thanks.Mike here: Well, I guess you should take them up on the advice.
Subject: Collimation.....do I have a problem with this? Sent: Wednesday, June 4, 2003 15:05:05 From: "Colin Scrivener" (col@12kc.freeserve.co.uk) I bought an LXD55 SC-8 like yourself about a month ago, and I have not really got the pin sharp images I was expecting. I have noticed when looking Jupiter for examplethat I can see a ghost image almost on top of the main one (slightly off centre). Every now and again it goes really clear then seems to "fuzz up" again because of this image. I thought it might be my eyes, but my wife agrees that there is a ghost image. The vendor of my scope said I may have a collimation problem, and larger scopes need to be re-collimated regularly(?). He has suggested I buy a "Coll-u-mate" replacement knob thing for about 16 ($30). What is collimation, does it sound like I have this problem, and what would you suggest I do to correct it if this is the problem? Thanks so much for your help and a very informative web site. Colin Scrivener UKMike here: Collimation is described in the manual. Basically, the collimation process ensures that light from the curved mirrors/optics all arrives at the proper focal plane with the same focus. Yes, those knobs can help but with most telescopes (and proper care when moving) recollimating should not be required that often (after six months with mine I've had no reason to recollimate). Since you said the image gets really clear at times, what you are seeing is not a collimation problem (which doesn't change over short periods of time). BUT you could be seeing the effects of "air currents" inside the tube if the telescope has not reached "thermal equilibrium" with the outside air. For best results, thermal equilibrium can take upwards of 20-30 minutes per inch of aperture. OR you could be seeing the effects of "poor seeing". For more on this and other telescope performance items, see the Observational Guides/References page on my ETX Site (http://www.weasner.com/etx).
Subject: Failure to slew Sent: Tuesday, June 3, 2003 15:07:27 From: "The Summers Houshold" (jes.sian@summers42.freeserve.co.uk) I've just read the post from Warren Vaugan on your latest discussion page where he is getting a slewing message with no scope movement following a normal alignment. I have this same problem, though intermittantand came across a post from Richard Seymour on your Jan 31 update. He says their was a problem with earlier firmware versions (pre 26Ec) that caused a refusal to point to Messier objects when quite slew is selected. Sounds like the problem I have, I wonder if it could help Warren? Jes.
Subject: LXD55 SN10 problem Sent: Tuesday, June 3, 2003 12:19:15 From: "Peter Bruce" (peterbruce@blueyonder.co.uk) I felt it wise to send you a copy of a letter I posted to the LXD group today and as yet I have not had a reply but it is early days yet. I am pleased you have opened up a site on the LXD because I own the LX200 (You featured my internal barlow lens)and the ETX and I now have the LXD. I look forward to a good site with information laid out as you have done before because you can find what you want when you want it.... Any way see what you feel about this problem. (Below as posted on LXD Yahoo site). I keep my SN10 at our caravan. Last weekend was very hot indeed (about 90+ deg where the tube of the scope is stored). As a result the metal tube of the secondary became loose in the corrector and moved with ease about 20 degrees.... The ring on the corrector securing the diagnal was tightened and I expected to re-align the optics. On looking at page 39 of the manual under alignment I found collimation would not be as easy or the same as my trusty LX200. The manual states that the diagonal needs to be off set in TWO directions by ABOUT an 1/8th of an inch in each direction.... I used my Kendrick laser to do the obvious basic alignment but how do I take in the "approximatly 1/8th inch" in each of the two direction with any degree of accuracy? After the laser collimation a star image is OK in the main field of view but how do I check out with 100% accuracy that any offset is correct as there is no way to check using the manual. Another confusing issue is the picture Fig 31a on page 40 which shows the image of the diagonal mirror (shaded area part 2)which is angled with its centre towards the primary mirror clip. the whole thing is as clear as mud. Can anybody point me to a site that will help me in this issue. Regards PETER BRUCE.Mike here: Since I don't have the SN model I can't speak from experience BUT if the star images look correct then I suspect you are properly collimated.
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Thanks for the reply Mike. I have star tested the scope after laser collimation and it just needed a slight tweak to get good star images but the two 1/8 inch offsets mentioned in the Meade manual were not clear at all. I have been told by Otto on the Yahoo group that he has a picture of a correctly collimated SN10 in the picture section and on examination it looks the same as mine. Taking the conversation still further I was told that the diagram in the Meade manual on page 40 Fig 31a was indeed wrong and I have also been told that the two 1/8" offsets are built into the diagonal holder. This type of question is precisely why I always go to the MAPUG or your ETX site as you can look up anything anytime under a heading rather than the same question being posted with a group every couple of months and you can never seem to find it when you need it. I look forward to your LXD site growing and commend you for your considerable efforts in this direction because I like many other LX and ETX go straight there if we need to "KNOW". Groups are fine but can be misleading on information sometimes. Regards Peter Bruce. Croydon UK
Subject: Lxd55 alignment Sent: Monday, June 2, 2003 09:52:02 From: "John Iannelli" (John.Iannelli@aheadcomusa.com) After setting up my lxd55 SC-8 in the polar home position andsuccessfully making a two star alignment I am able to get objects in the FOV that are overhead or near the zenith. As I select objects that are farther from thezenith they do not appear in the FOV. They do appear in the view finder. I think it's the way I am polar aligning the scope.I may need some polar aligning advice. Any helpis appreciated. John Iannelli Ahead Communications Middlebury Ct. 06762Mike here: It sounds like you might need to check the optical tube and RA axis alignment. See the LXD55 manual. See the Tricks and Tips document for more info.
Subject: RE: Autostar problem (again) Sent: Monday, June 2, 2003 01:08:55 From: Dimitris Rakopoulos (liquid@mediaone.gr) For some weird reason, the default on my Autostar is Terrestrial! When I reset the Autostar and go back to Targets the default is Terrestrial!!! I change it to Astronomical and a second after that my scope goes crazy. Is it possible this is a mechanical problem? Due to the fact that I can't use my Autostar I had on Saturday night and last night I had to excellent sessions. It was nice for a change and it's really helpful to learn the sky the real way! I will send you a detailed report during the day. Keep up the good work. Best regards, DimitrisMike here: What do you mean by "goes crazy"?
It starts moving arbitrarily! The moment I set Targets to astronomical it starts moving on different directions, then stops, then starts again to different direction. Then it stops for 20-30 seconds and then it starts again. If I try to put it on the home position and try to make an alignment it searches for a star, then says "Slewing" and does nothing. No movement. No nothing. And after a few seconds (sometimes) I get a Motor fault error message. I did reset, calibrary, and train drives as you told me. Any ideas?And from the Autostar expert:
From: Richard Seymour (rseymour@wolfenet.com) From the simplest to the hardest: (a) low battery (b) bad cable between Autostar and Telescope... (re-squeeze the ends, check with ohmmeter) The "crazy" motion is quite common if the motors are not receiving "solid" signals. They hear "Move... Fast/slow/up/???" and try to do them all at once. Try reversing the cable (plug Autostar end into telescope, telescope end into Autostar). Some Autostars had very weak spring wires in their cable socket. Check that all of the wires are equally visible, and that they will make solid contact with the cable. (c) sick Autostar (bad cable driver circuits) What happens if you try: Setup > Telescope > Calibrate [enter] ? The telescope -should- move UP for 2 seconds, then clockwise (right) for 2 seconds. Does it do that? If only one motor is being crazy, then it could also be: (d) sick motor controller card (inside telescope) (e) internal wiring problem: loose connector, wire cut by a gear or sharp piece of metal. (<-- happened to me) If this is a new telescope, return it to the dealer for warranty repair or replacement. ... and it was never mentioned in the messages Mike forwarded:: what model of telescope is it? If it is an LXD55, turn Setup > Telescope > Quiet Slew > OFF [enter] good luck --dickAnd more:
From: Richard Seymour >> I believe it did on both axes, yes. > Similar symptom.. just like turning on the sidereal drive, asking the > motor to move at any speed is telling it to move crazy. >> I pressed the numeric buttons to change the slewing speed but I always >> got max speed. I also got the feeling that the movement was not based >> on the amount or the time I was pressing the buttons. Meaning that I >> press the button for 2 seconds but the scope moved to the direction I >> requested for maybe 2 seconds plus something. Something like it moves >> in defined portions, if you get what I mean. Like if I press a button >> it will move 2" or 10". Yes. Another test (well, an example of why i think it might be a bad cable) is to turn it off, unplug the Autostar, turn it on. Wait. Many of our telescopes will then start to move randomly. (be ready to turn it off!). If those motions are similar to the ones you are seeing under Autostar "control", then the Autostar driver electronics are still suspect. > If both this and the other setting you mentioned are messed up it seems > like lots of things are wrong by a single/simple firware update. USUALLY this doesn't happen. I would certainly recommend simply re-loading v26Ed again, and see if that helps (if you have already done that, then there is no need to do it again...) good luck --dick (now going to work)And an update:
If I unplug the Autostar the scope does nothing. And now the weirdest of all. The scope works perfectly! No problem at all. I switched it on and it works. For some reason the default targets are terrestrial but when I switch back to astronomical everything works fine. Easy alignment works fine, too. I don't know what to say. I am uploading again 26Ed just to see what's going on, but the whole situation is bizare. I even tried to set different times in case the problem was on night hours (I did all the tests on afternoons and when I was in the field at night everything was wrong). So, I guess the problem is fixed. In any case, thank you for all your help. It was very valuable. Best regards, Dimitris
Subject: LXD55 8" Sent: Sunday, June 1, 2003 08:06:21 From: "Jeff Stewart" (surfjet1@cox.net) I just bought one of these great instruments, do you know where I can download a manual?? Or buy one? JeffMike here: If new, should have been one in the box. If used and the seller didn't include it, contact Meade; they will send you one, likely for free.
Subject: re: LXD55 10SN alignment/slewing problems Sent: Saturday, May 31, 2003 21:50:23 From: Dick Seymour (rseymour@wolfenet.com) To: Gailwov@aol.com When I slew back to Arcturus, do a sync, and do a go-to someplace else I get the slewing message but nothing happens. I can think of two common causes: (a) Firmware version: there was a bug in earlier (25Esomething) firmwares which did that to LXD55's ... some GoTo's wouldn't. Fix: update. (b) User technique: you have to tap [enter] (to REALLY select a target) before pressing [GoTo] to get there. Otherwise the previous target is still selected, so you GoTo ... where you already are! If the target's name is not on the TOP line of the display, it's not truly selected (yet). have fun --dickAnd:
then select something, hit enter, then go-to I get a "slewing" read out with no motion, no sound, (memo to self: keep reading past the sig...) Oh, well, suggestion (a) still holds... there WERE versions of the firmware which did that to LXD55's. Update to v26Ed. good luck --dick
Subject: Autostar problem (again) Sent: Sunday, June 1, 2003 00:48:07 From: Dimitris Rakopoulos (liquid@mediaone.gr) A while ago I had a problem with my Autostar going crazy after upgrading the firmware to version 26Ed. You suggested that I should reset, calibrate motors, and train drives. I did that and I have the same problem. For some weird reason when I change the targets from terrestrial (is this the default?) to astronomical the scope goes crazy. I even try to align it and when it finds an object no slewing is happening. I even get Motor failure notices sometimes. Any ideas? Should I try an older firmware? Is it possible this is a hardware thing? Everything worked fine with the previous version, though. Best regards, Dimitris Rakopoulos liquid@mediaone.gr Athens, Greece PS: I will send you my report on my latest session (all searching done with a map. Nice experience for a change!)Mike here: Terrestrial is not the default unless you make it that way. But until you complete the alignment, tracking will not start (normally). You could try the previous version (although I doubt the current version is the problem); you can find older Autostar version (English mostly) on my ETX Site, on the Helpful Information --> Autostar Information page. When you change from astronomical to terrestrial mode, do you change the mount from a polar mount to an alt/az mount? If so, do you remove the counterweight rod?
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