LXD75 all wacky...
Posted 08 April 2009 - 05:36 PM
I go use it and the GOTO's are terrible. All a couple degrees off.
Next night, I go out and do a three star again, this time I get the 'less than 5'' off message, and the GOTO's are dead on.
Anyone else run into anything like this? I checked the encoders last time I had it apart and there is no crud in there at all. I did however do a drive cal before the align the last time, however.
Posted 08 April 2009 - 06:58 PM
Posted 10 April 2009 - 07:28 AM
As footnote, I just use my polar scope to align my mount (and the polar scope as been aligned as per the manual) and a two-star alignment. When I'm done for the night I park my scope and bring things back inside. The next time out I just polar align, GoTo a bright star, and synch the mount. No other alignment. I calibrate and re-train maybe once a year and I re-do the two-star alignment every couple of months or if I do something stupid that messes up the alignment.
If you're looking at the encoders, make sure there's nothing hiding between the light source and the detector; the encoder wheel itself might be clean but there could be a dust bunny stuck between the emitter/detector.
Posted 10 April 2009 - 12:24 PM
this setup is fixed on a pier, and left polar'ed when I'm done, so that eliminates set up error as a problem here. I pull the OTA and cover the mount after I park it.
Currently I have two OTA's I run on it, an SN8 and a 120mm F5 refractor. The SN8 has been getting most of the play lately, and I usually retrain when I switch OTA's because I need to rebalance anyway and I might as well.