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Re: RA Mesh adjustment for 2104 model Mach 1 GTO

No hurry and thanks for excellent explanation. Peter

By Peter Nagy · #82301 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Yes, it's quite smooth. I don't have any pix at my disposal at the moment, but will dig some up when I get back. Rolando

By Roland Christen · #82300 ·

Re: Testing SkyTrack continuous tracking with the Mach2 #Mach2GTO

FYI If you have Norton/Symantec as your virus checker on downloaded files, it will quarantine SkyTrack and flag it as WS.Reputation1. This is NOT an actual virus. This is Norton's designation for a

By Worsel · #82299 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

OK. Without encoders and using spur gears, I assume PE would look somewhat sinusoidal. Peter

By Peter Nagy · #82298 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Yes. With encoders it looks the same as the Mach2 with encoders. Without encoders you have PE but without belt ripple. Without encoders but with PEM activated, you have low PE and no belt

By Roland Christen · #82297 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Do you have a similar graph using spur gears instead of belts like from A-P1100GTO mount? Peter

By Peter Nagy · #82296 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Actually the graph below shows belt ripple + stepper motor ripple + periodic error. The stepper motor ripple is very small but shows up as tiny wiggles on the belt ripple. The periodic error is the

By Roland Christen · #82295 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

I didn't realized you were comparing encoded mounts to non-encoded mounts whether gear reduction uses spur gears or pulley belts. Yes, absolute encoder mounts beat everything else especially when

By Peter Nagy · #82294 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

I'll answer both your questions. 1) .02 seconds at 1x sidereal is .02 x 15 arc sec per second = 0.3 arc seconds 2) if you didn't know at this point, I would like to make clear that the Mach2 is a

By Roland Christen · #82293 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

On Fri, Oct 15, 2021 at 02:14 PM, Roland Christen wrote: RolandYou inferred that 150mm focal length 50mm diameter guide scope as being inadequate for the Job. can you give a rule of thumb as to the

By Jim Crumly · #82292 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

My bottom line is I pay more attention to FWHM of stars in images than graphs from auto guider software. Sometimes I get fairly high RMS and still get low FWHM of stars in images. The graphs or

By Peter Nagy · #82291 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Unfortunately rms is not a good representative of tracking because it basically smooths out peak excursions that can leave stars eggy or having small appendages. I would rather have consistent 1 arc

By Roland Christen · #82290 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Inputting MnMo in PHD2 is in pixels. Which is why I like to think in arc-secs and convert to pixels based on my image scale of my equipment. How does 0.02 seconds translate Min Move to 0.3 arc-secs?

By Peter Nagy · #82289 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

>>>I'm not sure what the number of the Min Move in PHD actually is. It's dimensionless, so it could be P-P, RMS, arc seconds, inches, miles, parsecs, degrees centigrade, etc. Min move in PHD is

By Brian Valente · #82288 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

MinMo in PHD2 is set in pixels (or fraction of a pixel), so will vary depending on your guiding image scale. And RMS in PHD2 is reported in both arc-seconds and pixels, though sometimes people seem to

By steve.winston@... · #82287 · Edited

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

I'm not sure what the number of the Min Move in PHD actually is. It's dimensionless, so it could be P-P, RMS, arc seconds, inches, miles, parsecs, degrees centigrade, etc. In Maxim DL it is defined as

By Roland Christen · #82286 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

From yesterday's guide log, it seems 200mm guide scope was used for calibration.

By Tarun Kottary · #82285 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

I simply use 0.8" for MnMo and translate to pixels based on image scale of my equipment and works well. Peter

By Peter Nagy · #82284 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

It's not that simple. The purpose of the MnMo setting is to allow PHD2 to ignore guide star position errors that are smaller than the scintillation from seeing. Since seeing varies

By W Hilmo · #82283 ·

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

well I got my min-mo's from the GA last night so that should be adequate.

By nicholas · #82282 ·

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