I said "HAD".Meade's new firmware function control Conversely, fellow ETX-er Dick Seymour has had more trouble with backlash in ALTITUDE and little in AZIMUTH backlas. Indeed, myĪltitude (I use Polar mode, so it is "Declination) had perfect response,Įven with the slowest speeds, but horrible in azimuth (my RightĪscension). This problem is very pronounced in many ETX 90's and -125's inĪZIMUTH, and there are a few complaints concerning ALTITUDE backlash. Puts you now uncentered in the OPPOSITE direction. It is accompanied by a sudden "jerk" and an all-to-rapid reversal than In many cases, when the motors finally DO engage the image to reverse, Is particularly troublesome, jerky and gets you going back-and-forthĪttempting to center a high magnification.
Will also experience a considerable "overshooting" of your object inĪzimuth after you "let go" of your appropriate button. Likewise, if the response time is non-existent or extremely slow, you Who have reported NO response at all in attempt to center in azimuth with Particularly the azimuth (right ascension or R.A.) buttons of Autostar Most annoying - slow (if ever) response times to react when pushing The "rubber band" effect, improper right ascension tracking, and perhaps The term "backlash" is frequently used (sometimes incorrectly) toĭescribed tracking and slewing errors or all sorts: "creep after beep", This is due to positional-selective backlash.
We all have experienced "spots" in the sky at which tracking can be perfect, yet your next GO TO position reveals very erratic tracking. This can be due primarily (in addition to poor training techniques) to your telescope being aimed at a particular angle in which the telescope is "relaxed" or not engaging fully with torqued gears.
However, even with the "Train Motors" done accuratelly, there can be residual backlash still remaining in your telescope. Your "Train Motors" function under "SETUP/TELESCOPE" is a quick and convenient - and very accurate - method to eliminate most backlash that AutoStar detects in the drive trains of ETX and LX 90 telescopes. Setting Percentages For Better (Clay Sherrod)Ī WELCOMED FEATURE ON MEADE'S VERSION 2.1EK FIRMWARE -Ī very welcomed and new addition to the AutoStar database (version 2.1ekĪnd beyond) is the capability of ETX and LX 90 users to manually key inĭeficiencies in altitude and azimuth BACKLASH.
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