×
INDI Library v1.8.1 Released (09 Sep 2019)

Monthly maintenance release INDI v1.8.1

Slew to Target never slews far enough

8 months 3 weeks ago
rogmet
Fresh Boarder
Fresh Boarder
Posts: 3
More
Topic Author
Slew to Target never slews far enough #35380
Hello,

I'm having weird difficulties getting my mount to the right position. It's a Sky Watcher AzEq6 GT with an RPi3+ running Stellarmate sitting scope-top. I'm running KStars 3.1.0 on Linux Mint 19 connected to the Pi over the network.

If I tell EQMod to track something, it goes to the right part of the sky. I then go to Ekos and click Slew to Target. It solves and slews a bit, then solves and slews a bit more. It keeps repeating this over and over, maybe never getting there. I've attached a screen capture of a typical Slew to Target.

Any ideas where to start with this? Is my mount toast or in need of some TLC?

Thanks,

Ralph
Attachments:

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
pch
Gold Boarder
Gold Boarder
Posts: 161
Karma: 2
More
Slew to Target never slews far enough #35385
You probably have a pointing model active using N stars alignment in Eqmod and the weight of the new point you sync near the target is insufficient to influence the pointing result.
When using plate solving it is best to disable this pointing model.

Open the Eqmod INDI setting.
In the Sync tab set "sync mode=standard sync" and click "clear sync delta".
In the Align tab for "manage list" click "clear list" and set *alignment mode=nearest point".

After that retry the slew, even with two degree of initial error it must be on the target after one or two move.

The following user(s) said Thank You maxthebuilder, rogmet

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago 8 months 3 weeks ago by rogmet. Reason: Update
rogmet
Fresh Boarder
Fresh Boarder
Posts: 3
More
Topic Author
Slew to Target never slews far enough #35414
Thank you Patrick, I will give it a go next time the sky is clear.

Edit: working beautifully, thanks again!

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
Ihoujin
Platinum Boarder
Platinum Boarder
Posts: 688
Karma: 3
More
Slew to Target never slews far enough #35417
Why is this the first time I have heard this tip. I have also noticed zeroing in while using slew to target takes more tries than one would expect. Is this use case documented anywhere I may have missed?
I will have to try this for myself next time I have the chance.

INDI/KStars on Raspberry Pi 3B+
Lubuntu 16.04
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG @280mm Guide Scope
PHD2
Adafruit Motor Hat shield
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.

Please Log in or Create an account to join the conversation.

4 months 1 week ago
knro
Administrator
Administrator
Posts: 7355
Karma: 51
Slew to Target never slews far enough #40848
Should EQMod default to NEAREST instead of N-Star?

Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info

Please Log in or Create an account to join the conversation.

4 months 1 week ago
pch
Gold Boarder
Gold Boarder
Posts: 161
Karma: 2
More
Slew to Target never slews far enough #40859
Maybe it is not necessary to change the default, this can be a bit disruptive for people that rely on this function.

I have added a note in the Eqmod documentation at the Alignment chapter:
www.indilib.org/devices/mounts/eqmod.html

The following user(s) said Thank You Blueshawk

Please Log in or Create an account to join the conversation.

Time to create page: 0.310 seconds