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Re: Needle bearings and axial play, is this a significant performance problem and how difficult is it to fix?


 

On Fri, Jul 23, 2021 at 01:27 PM, Brian Valente wrote:
Hi Peter
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Can you post your guidelogs for that night? that would be?great, thanks
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On Fri, Jul 23, 2021 at 1:16 PM pcboreland via <pcboreland=[email protected]> wrote:


New bits arrived today. Will change out the Ra thrust bearings a see if reduces the 2600s error shown in the previous posting. These thrust bearings are German sourced from McMaster!

Also, received the 1024 optical encoders from US Digital. I hate to tear down what is already a superbly performing system, but this is all in the interest of science and you guys. Will put back the 25: 1 ratio gearbox in the Dec axis and install the 1024 step encoder. Lets see if we can achieve same high level of guiding precision while preserving slew rates.

Oh my backlash was 40ms last night and Predictive PEC absolutely nailed the 240s error (see attachment) by totally tuning into it (please note earlier post how I reduced the 80S error), and still no PEC.? The attached image is a 400s Ha single frame of the Cave Nebula, 2.4 um/px. Seeing was horrible and transparency was dire due to lingering smoke in the atmosphere - full moon.

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Brian?
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Here is last night PHD2 log.?

Peter

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