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INDI Library v1.8.3 Released (02 Jan 2020)

Minor monthly bugfix release with a new RainbowAstro mount driver and improved pier side simulation.

Solver not moving mount enough when slewing to center target.

1 month 1 week ago 1 month 1 week ago by Lead_weight.
Lead_weight
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Solver not moving mount enough when slewing to center target. #47800
This is happening to me a lot lately. It might be a side effect of having a 10Micron mount where it thinks it's accurately pointed to the center of a target, but it's slightly off. I have a target picked in the scheduler, and part of the initial setup is to slew to the target. It has taken 18 slew commands to move 1 arc second at a time to try and center the target. I don't suppose there is any way to nudge it to the center. The slew command to the target over and over isn't always working smoothly. This is especially the case after a meridian flip for some reason where the pointing model might not be as accurate on one side of the mount. But I don't know for sure.


-Andrew
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Mac Observatory - All about using the Mac for Astrophotography: www.macobservatory.com
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1 month 1 week ago
suvowner
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Solver not moving mount enough when slewing to center target. #47802
did you select differential slewing in options ?

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1 month 1 week ago
ChrisRowland
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Solver not moving mount enough when slewing to center target. #47808
The simplest thing may be to increase the tolerance to 40 arc secs. It looks as if the mount slew ends up about 30" in Ra away from the target. It could be because the mount firmware calculates the target position without allowing for the time the slew will take. The fial slew takes just ove 2 seconds so there's an error of just over 30".

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1 month 1 week ago
Lead_weight
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Solver not moving mount enough when slewing to center target. #47814

suvowner wrote: did you select differential slewing in options ?


I’ve not changed the default options. How would this effect it?

-Andrew
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Mac Observatory - All about using the Mac for Astrophotography: www.macobservatory.com
Astrobin: www.astrobin.com/users/Lead_Weight/

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1 month 1 week ago
Lead_weight
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Solver not moving mount enough when slewing to center target. #47815

ChrisRowland wrote: The simplest thing may be to increase the tolerance to 40 arc secs. It looks as if the mount slew ends up about 30" in Ra away from the target. It could be because the mount firmware calculates the target position without allowing for the time the slew will take. The fial slew takes just ove 2 seconds so there's an error of just over 30".


I’ve done this a few times to speed up the process. It works, but would prefer the slew to center the target.

-Andrew
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Mac Observatory - All about using the Mac for Astrophotography: www.macobservatory.com
Astrobin: www.astrobin.com/users/Lead_Weight/

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1 month 1 week ago
suvowner
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Solver not moving mount enough when slewing to center target. #47819

Lead_weight wrote:

suvowner wrote: did you select differential slewing in options ?


I’ve not changed the default options. How would this effect it?


not sure, only one way to find out. if you hover the cursor over the box for differential slewing it says it works better on some mounts, i.e. paramount if I remember correctly, so it might be worth trying to see if it helps

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