Last updated: 31 May 2005
Subject: LXD - 75 Refractor Sent: Tuesday, May 31, 2005 12:12:20 From: Rhoades, Dennis, VBAVACO (email@example.com) I recently purchased an LXD - 6" refractor and am having trouble with the right ascension drive. After aligning the telescope and training to motors in Autostar, when I am looking at Jupiter or Saturn at high magnification (174X), the image jiggles about every 5 seconds, and the jiggle is regular and predictable. I've owned several telescopes over the years and have never seen this in a clock drive. Is this a mechanical flaw/failure in the drive itself, or something I'm missing in programming the Autostar? This problem is in addition to inaccurate pointing in the GOTO function. DennisMike here: Did you do a CALIBRATE MOTORS before doing the TRAIN DRIVES? Did you TRAIN in both axes? If you have done these, could you be overtightening the axis lock?
Subject: Solar filter for LXD55 SC-8 Sent: Thursday, May 26, 2005 05:37:45 From: Lamar McLouth (firstname.lastname@example.org) I also have a Meade LXD55 SC-8 and I was thinking about getting a solar filter. I measured the outer diameter of the OTA and it is 9.125" (231.775mm). I was looking at the Baader Solar Film solar filters from Kendricks (and other places). Do you have a solar filter or any input on which ones work well with the LXD55 SC-8? Thanks for the great site. LamarMike here: The Baader material works fine. Keep in mind that you don't necessarily need a full aperture filter, you just need the aperture fully covered. A cover with a small filter diameter (offset from the secondary) will work fine.
Subject: re: Feedback - LXD MOUNT and Autostar Sent: Friday, May 20, 2005 21:18:39 From: Richard Seymour (email@example.com) Which version of firmware are you running in the Autostar ( Setup > Statistics > [enter][scroll up] ) Some versions have had problems with PEC and LXDs. Upgrade to 33El , Train the PEC, and then do two PEC Update sessions. (simply Training does not produce a good dataset) have fun --dickAnd:
From: Gernot Stenz (firstname.lastname@example.org) Richard SeymourAnd:
writes: Thanks you guys. I have have calibrated and trained the motors more than once, but to no avail. However, in a system as complex as the Autostar, a software bug at least seems plausible. >Which version of firmware are you running in the Autostar >( Setup > Statistics > [enter][scroll up] ) I did not have access to the mount but from earlier experiments I remember something like 32Ga. >Some versions have had problems with PEC and LXDs. >Upgrade to 33El , This is what I am trying to do next, although I could only download 34Ga. >Train the PEC, and then do two PEC Update sessions. >(simply Training does not produce a good dataset) Yup, but for the time being I would be happy with just ordinary tracking while PEC is active. >have fun Im trying to, believe me. Gernot
>>Some versions have had problems with PEC and LXDs. >>Upgrade to 33El , >This is what I am trying to do next, although I could only download 34Ga. 34Ga is -newer- than 33El. You can certainly use 34Ga (i see that Meade Europe is ahead of Meade US in terms of posting it) >>Train the PEC, and then do two PEC Update sessions. >>(simply Training does not produce a good dataset) >Yup, but for the time being I would be happy with just ordinary tracking while >PEC is active. I forgot to mention doing a PEC Erase before the Training And doing the two updates after the Training seems to help make the data -much- better. good luck --dick
Subject: Feedback - LXD MOUNT and Autostar Sent: Friday, May 20, 2005 08:05:36 From: Gernot Stenz (email@example.com) I have a question regarding the PEC feature on the LXD mounts. A similar question was posted to Cloudynights. I recently obtained a Meade LXD-75 with the 8"SN. Due to long stretches of bad weather I only just got around to first light. I quickly came to realise that an LXD with Autostar is a much more complex system than my other mounts and control units. So, first light was followed by a re-calibration of the drive motors, a new drive training and then a second light. Strangely enough, even though the mount now tracks better than it did the first time, I cannot seem to get PEC to work properly. I went through the training routine twice, but every time when I activated PEC afterwards, the mount began to slightly drift eastwards. I trained PEC with the use of a barlowed webcam at an effective focal length of 1860mm. I sat down in front of the notebook and used the arrow keys of the autostar box to keep the star centered on the crosshairs, until the Autostar beeped to let me know the training was finished. Was there anything fundamentally wrong with what I did? Has anyone here managed to get the Autostar smart drive feature to work properly? I am a bit puzzled. TIA and CS Gernot -- __o Gernot Stenz e-mail:firstname.lastname@example.org /\ -\<, WWW: http://www4.in.tum.de/~stenzg /\/--\ _(_)/(_)_Fromentine - Paris: 3584 km______________________________/ \Mike here: Did you do the CALIBRATE MOTORS and TRAIN DRIVES (on both axes) before setting up the PEC?
Subject: GRS: Next appearance? Sent: Thursday, May 19, 2005 11:32:13 From: Dave Lazok (email@example.com) I have an LXD-75 AR5 and have looked at Jupiter for about 6 hours straight looking for the GRS. I have an LPI cam to do the seeing. I have not seen the GRS and wonder if my 5" refractor is just too small a light bucket?! A friend has a 14" Celestron, lots of planetary shots, but NO GRS and he is to the point of anger. I just downloaded Meridian program for Jupiter, but wonder if there are any TIPS for capuring the GRS? Dave Lazok (I may be found at www.lxd75.com as user: dlazok) I observe from Buena Park, CA. 90620)Mike here: The Great Red Spot is more a PPS (Pale PInk Spot) right now and has been for decades. It is difficult to detect even when you know it should be visible. Filters can help; even just one that will reduce Jupiter's brightness (especially with a large aperture telescope). If you don't have any filters try wearing sunglasses (seriously).
Subject: alignment of secondary on SN-8 Sent: Wednesday, May 18, 2005 18:42:21 From: Matt McEwen (firstname.lastname@example.org) According to my manual, the secondary should be positioned so that it looks a bit like an egg when viewed through a sight tube or Cheshire. However, according to the ultimate collimation PDF, the secondary should be centered as on most reflectors. My question is, which is it? I went ahead and centered it during the collimation process, and I would rather not move it back but I guess I could. Thanks, Matt McEwenMike here: Both could be correct. I don't have one to check but if you look at the secondary it could appear oblong. But if you look at the "reflection" that could show the mirror as centered.
Subject: re: Feedback - LXD MOUNT and Autostar Sent: Saturday, May 14, 2005 19:53:06 From: Richard Seymour (email@example.com) The AUX port cannot directly control a simple motor focuser. You have to use either a Meade focuser designed for an AUX port, or the Meade 909 APM (Accessory Port Module)($50) which -does- have a socket into which you can plug a simple motor for focusing. (The Autostar will only recognize and use a 909 APM if it's attached to an LX90, LXD55 or LXD75). The AUX port supplies a "serial addressed packet bus" signal, plus fixed +12v and ground. The Autostar interrogates that bus for "intelligent" response, and only offers the focus menu if it hears a proper response. The "bus" is a modified Philips IIC (or I2C)-like bus, in case you're familiar with it. have fun --dick
Subject: Feedback - LXD MOUNT and Autostar Sent: Friday, May 6, 2005 14:28:55 From: CigTech (CigTech@verizon.net) Me Again. I was wanting to put a focuser motor on my Celestron C4-R scope that is on my lxd55 mount. I wanted to know if the autostar can control the focuser motor or will I have to make a controler for it? I have the wiring picture from your site but do not see how the Autostar could control it. I could use the Aux port to conect the foucs motor but I don't know if the Autostar knows how to use it. Let me know if there is a way to use the Autostar for the focuser motor. Thanks, JerryMike here: The Autostar can control a focuser; it controls the Meade one. So you should be able to work up something via the AUX port.
Subject: LXD-55 updated stuff for tech tips... Sent: Wednesday, May 4, 2005 06:31:25 From: Steve Arnold (firstname.lastname@example.org) I've been busy of late doing some add-on stuff, and relocating/revitalizing my website. There's some hardwired power supply info at http://www.simcoeskies.com/powersupply.html and finally, my latest project, PICfocus - a feature-loaded PIC micro controlled electronic focuser at http://www.simcoeskies.com/picfocus.html Clear skies, Steve Arnold
Subject: RE: Feedback - LXD MOUNT and Autostar Sent: Thursday, April 28, 2005 12:42:36 From: CigTech (CigTech@verizon.net) When I bought the mount it had been setting for a while. So I think it was just a bad conection. After using it for a month now it seems to have worked itself out. I think corrosion had built up on the wires in the RJ-45 jack. Also my Autostar had not been used in some time. I'm still trying to figure out how to do a good alinement on it. I can get it to come with in a few deg's from the object I tell it to goto. I'll work it at soon enough I guess. I have been looking for some one in my area that has a LXD55/75 that could give me some pointers on how to aline it right. Ho by the way heres my Pier mount I made for it.
Thats for you time and help. Jerry Payne
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