|This page is for user comments and information specific to the Meade DS, DSX, and some older telescope models. Accessories and Feedback items appropriate to the ETX models are posted on other pages as appropriate. If you have any comments, suggestions, questions or answers to questions posed here, e-mail them to me for posting. Please use an appropriate Subject Line on your message per the Site Email Etiquette. Thanks. Remember, tips described on this site may invalidate the warranty on your telescope or accessories. Neither the submitter nor myself are responsible for any damage caused by using any contributed tips.|
Subject: DS-2102 mount slewing error Sent: Tuesday, May 24, 2011 12:57:04 From: Saul Grijalva (firstname.lastname@example.org) My telescope, a ds-2102 has a strange behavior. When start to align procedure, the telescope moves in Alt and Az to locate the star but never stop. It continues moving even when the autostar indicate "center star and press enter". If I dont perform an aling procedure but set observing objects to astronomical, the telescope start to moving in Az and Alt with out stop. If I switch on the telescope with out perform an align or change to astronomical observation, pressing the MODE key to observe the coordinates, they change quickly in az and alt but the telescope is not moving. I have done the following but the problem continues: *Change batteries, internal and pack, *Reset autostar *Calibrate motors *Change Autostar cord *Download latest autostar software *Reset again *Calibrate motor again Nothing works. Any idea what is wrong with my mount? Thank You. Regards, Saul Grijalva MexicoMike here: Doing the RESET and CALIBRATE MOTOR normally cures this type of problem. But you also need to re-TRAIN DRIVES after doing the RESET.
Thank You for your response. I just did a new reset, calibate motor and train drives but the problem persists. I think is time to start saving for a new mount :-( Any way, thank you for you time. Regards, Sal.Mike here: One thought: disconnect the AutoStar and leave it disconnected for 24 hours. Sometimes that cures problems. Also, remove the batteries (and any external power) from the telescope and let it set unpowered for 24 hours.
I disconnected the AutoStar and removed all batteries for 24hrs but unfortunately did not work. When put back the batteries, I reset, calibrated and train drives but the problem persists, I cant use the telescope with astronomical targets, the drives move with out stop. Thank You again. Saul.Mike here: If you disconnect the AutoStar from the telescope and then power on the telescope, what happens? Do you see the same behavior as when the AutoStar is connected?
No, the problem is only with the AutoStar. When power on the telescope with out the AutoStar, nothing happens. But when the AutoStar is connected and change to Astronomical Targets or start to align, then the drivers go crazy. If I dont Align or set Targets to Astronomical I still can move the telescope with a little difficulty with the direction keys of the AutoStar and set the speeds too but even then when press MODE for few seconds, the coordinates RA and Dec are moving and the Alt and Dec too.Mike here: OK. Some possibilities: a key is stuck on the AutoStar keypad, the AutoStar software is corrupted, or the AutoStar has gone bad. Cleaning the keypad may solve the first problem; see the article "Keypad Cleaning/Repair" on the Helpful Information: AutoStar Info page. Re-installing the software may solve the second problem (assuming there is no memory problem on the AutoStar). Replacing the AutoStar would solve the third problem. There are other possibilities as well, such as dirty encoders but I have my doubts about that being the culprit. But you might want to see the article "Cleaning Encoders" on the AutoStar Info page. That article is for the ETX, not DS, so I'm not certain how applicable it would be.
Subject: DS series single arm mount Sent: Tuesday, May 24, 2011 10:03:46 From: Paulw3tzi@aol.com (Paulw3tzi@aol.com) On one of my single arm mounts I was having trouble with the alt lock knob not being tight enough. I disassembled it to see if I could improve things. I removed the jam nut on the knob shaft and tried to unscrew the shaft from the little three legged piece. It was a bit tough but it came off. I found that he knob shaft had a 1/4 28 thread on it and the jam nut was 1/4 20. Not good. I have a set of dies so I used the 1/4 28 die to clean up the threads on the knob shaft. On the outside there is a large nut with two flats on it. It was extremely tight but I managed to remove it. I removed the scale in order to see what was under it. Not much. I turned my attention to the area where the three legs of the friction piece fit and found what looked like grease. I cleaned that off the best I could. I began to re assemble. When I put the large nut back on I now found that when It was tight as before it was too tight and the elevation wouldn't move. I backed off a little and things seemed better. I then re assembled the lock knob. I then placed a 1/4 28 jam nut on the end of the shaft. Now when I turn the lock knob everything seems to work OK. I tested it by hooking up the controller and doing an align. Now everything works as it should. The conclusion I came to was that during assembly someone supplied the assembler with a tray full of 1/4 20 jam nuts instead of 1/4 28. The assembler could not tell the difference because when you mix two different thread sizes the threads jam up and it acts just like a jam nut. I haven't any idea what the situation was with the large nut on the outside but it seems to work like it should now. Additionally I removed the scope ring from my other mount and found the same thing. A 1/4 20 nut on the end of the knob shaft. I will not touch that (yet). I hope this story will help someone with a similar problem. Paul Eriksen, Newark Delaware.
Subject: Re: DS2090 battery box bad connections Sent: Sunday, May 8, 2011 00:21:22 From: email@example.com (firstname.lastname@example.org) in case it might interest your readers I update this saga. The problem with batteries persisted. It went back to Meade who said they tested the motor and it was OK. Now I bought a mains adapter - this solves the problem. Things seem to go better in general with that - I should have done it long ago. Cheers Andy
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