I used Pempro and my ST8300 for the training - results attached after one 48 min training session
What have others achieved with LX200's and how often should I retrain? Also does the PE vary with different pointing positions
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Posted 23 December 2012 - 12:59 AM
Posted 23 December 2012 - 10:19 AM
Posted 24 December 2012 - 08:12 AM
Posted 27 December 2012 - 07:43 AM
yes, it is wrong. the PE is given by the imperfection of mechanical processing of the worm screw. In addition, mechanical imperfections of the gear, also affect the PE. Encoders and motors do not affect the PE. In other words a position very different from the formation PE could give different results, precisely because of the different position of coupling between the worm and gear wheel.
As far as PE varying with different pointing positions, if I understand the theory correctly, the PE should not vary, since the error is in the motors/encoder and not dependent on position.
But like many other things .... I could be dead wrong...
Posted 27 December 2012 - 10:37 AM
Posted 27 December 2012 - 02:00 PM
Thanks. I misspoke by not including the worm screw, which obviously is the basis for PE. However, I fail to understand how a scope position, say pointing Southeast at 30° declination will produce a different PE than pointing the scope to the Southwest at 15° declination. If that is the case, one would have to have a different PEC for every scope pointing direction (infinite number).
Since the worm gear cycle will be the same over a given period of time, irrespective of where the OTA is pointing, one does not have to do a PEC for every possible pointing direction.
But as I said earlier, I could be dead wrong.
Posted 01 January 2013 - 12:39 PM
Posted 01 January 2013 - 07:40 PM
I've Had my scope since 2004 and never did a PEC. Wouldnt even know where to start. Is it really necessary? I'm trying to get into astrophotography, at this point i'm having trouble with the focus even with a B-Mask. I think its the DSLR.
Posted 02 January 2013 - 09:14 PM
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