I would consider both PEC and Backlash Compensation as forms of Drive Training - they both train the drives to behave differently to correct for errors.
I'm not really clear on what type of drive training you're meaning, I'm interested to know if the LX200 GPS has some additional form of drive training above and beyond PEC and backlash? It sounds like what you're correcting for in that circumstance is flexure and other variables, such as TPoint would but without having a point of reference in the sky? Is that what you mean?
Thanks,
Roger.
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