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I set the step size smaller, but it uses 500ms anyway. For TVC, I used 10, which is what I derived from the G8 axis.? I didn't change it when I upgraded to the G11, but from the backlash test, at

What I meant was that our methods determined a TVC value for the gear backlash only.? This part is generally fixed and doesn't depend of sky location, gravity, temperature, etc.? I don't have an

Allen, I have to quibble with you here. TVC does not just remove the gear backlash (I assume you mean gearbox), it removes all the backlash including the worm "mesh" backlash. Did I understand

regular parlance. yes, that sounds about right :) [email protected]> wrote: -- Brian Brian Valente portfolio brianvalentephotography.com <http://brianvalentephotography.com>

John, The whole reason why I am testing with a rigid coupler is to ensure that the worm and motor shaft are axially aligned as much as possible. But, as you say, there is a potential problem here. If

You only have up to TVC value of 255 you can set. You may just run out of integers ;)

Thanks guys! I suppose I could have looked this up but I was lazy. ?This makes a lot of sense and 8x guiding rate for the adjustment is not quite instantaneous, but probably good enough. I hope folks

Paul, Thank you for confirming the TVC speed (8x). I could not find it anywhere except an old post which stated 20x which did not match my measurements. Eric

Both our methods (laser or allen wrench)? use TVC to remove all the gear backlash BEFORE it gets to the worm.? There is additional backlash between the worm and ring gear (including ring gear

Exactly. TVC value is the number of encoder steps to take at 8x the guiding speed. The smaller the encoder step, the larger the TVC value required to compensate for the same amount of backlash.

Peter, According to the Gemini serial commands, the TVC value is measured in encoder steps, programmable from 0 to 255. If your step size is 5 times smaller, your TVC value will be 5 times larger for

Hello all After getting my new G811G last month, I had some trouble with the random slews and trying to configure PHD2 to get better results with guiding, but things are working pretty well now. This

I'm in the market for a second mount. I posted an add yesterday in Astromart. But I"m really only wanting the head, no tripod, controller, etc. Please feel free to PM me.

Brian, Tomorrow is a clear night and I'll run some PHD2 backlash tests to confirm my bench results one way or the other. The value of 100 I determined to cancel out the backlash seems to be at odds

I had an issue that I traced down and fixed with PHD2 / Indi where phd's "stop guiding while slewing" didn't completely work. I believe that there may have been some guide commands in the buffers

Hi Peter Real world results are what matters, so if a production mount guides best with a TVC value of 0, 5, 50, or 5,000, and we can replicate that and demonstrate it delivers the best results for

I'd advertised an older CG11 with the Gemini 2 upgrade on Cloudy Nights ( https://www.cloudynights.com/classifieds/item/260195-losmandy-g11-w-gemini-2-and-other-updates/ ) and despite lots of views,

Fantastic results David, congratulations, great images.? ?I will need to try PHD2 next time and see if that is better than Ekos where I got to about 0.6" total RMS last time.? This is with a 12"

Your screen shots have too large a scale on the guiding plots, so it's hard to make out anything. Based on the guide logs, you have too much backlash compensation

Peter, Phew! You have done some pretty interesting work here researching all the physical dimensions and tolerances, plus you obviously have an engineering or tech background. As far as HGM being able