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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 02:25 PM, alan137 wrote:
On Fri, Jul 23, 2021 at 01:16 PM, <pcboreland@...> wrote:
backlash was 40ms
Try TVC=0 for "real" backlash numbers.
Allan,

I measured the backlash with TVC = 0 and PHD2 returned a value of just under 2s. With TVC = 85 (0.14 arc-sec step resolution) , or 21 at 0.57 arc-sec step resolution,? the backlash measured in at 125 ms +/- 45ms. Now my guiding yesterday adaptively set the backlash at around 40ms. I think this is instructive for folks looking to reduce their backlash. TVC clearly work well at the scope level.

Peter
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