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INDI Library v1.9.0 Released (23 Apr 2021)

Major INDI Library release v1.9.0 bring significant internal changes championed by @pawel-soja to modernize core INDI Library drivers and clients. New drivers for DeepSkyDad Flat Panel & Pegasus devices plus further improvements to PCM8 drivers.

RST-135 mount - what are the best practices?

  • Posts: 527
  • Thank you received: 53
Continuing talking to myself...
Tonight, I am having the second night out with the mount.
Same thing - guides smoothly at 0.6-1.0" RMS total and then every 1-3 min RA spikes.

Out of curiosity I installed a counterweight (2kg). Luckily, I had a proper shaft and a weight.
Guess what? No more RA spikes/runaways!

That's with my smallish AT72.

I wanted to lighten my travel bag with this mount but it's not going to happen, I am afraid....
Guiding is really great at 0.6-0.8" RMS total now.
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
Last edit: 1 month 1 day ago by maxthebuilder.
1 month 1 day ago #70172

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  • Thank you received: 133
Did you sort out the flip? Was it side of pier? I haven’t used mine with StellarMate/EKOS in a few months. Been using ASIAir and trying NINA. But previously had no issues with the meridian flip. I did have to set a 5° past meridian limit in the hand control, then set EKOS to flip at 3 minutes past meridian. That seemed to work for me. I’m anxious to get back to EKOS, as it’s still my favorite capture application. But we’ve had such a string of bad weather, it feels like it’s been a month or more without any opportunities to use it.
-Andrew
––––––––––
Mac Observatory - All about using the Mac for Astrophotography: www.macobservatory.com
Astrobin: www.astrobin.com/users/Lead_Weight/
4 weeks 1 day ago #70253

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Yes. I don't know what happened the first time I tried the meridian flip...
The second time it worked fine.
Also when I enabled the "simulate the pier side" option it made matters worse. I keep it OFF.

The pier side is "undefined".

I don't use the hand controller at all.
I figured that it's only needed to be used once to push coordinates/date/time to the mount for a particular location.
If you travel to a different location/time then the HC needs to be connected again and synced with the mount.

So, my scope is in the default RST Park position (horizontal, facing west).
I connect to INDI/Ekos and there I have its Park position defined as facing NCP. So, I park it from Ekos and it goes to NCP.
In the end of a session I manually drive the mount back to horizontal position (with Ekos Mount Control).
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
Last edit: 3 weeks 1 day ago by maxthebuilder.
4 weeks 1 day ago #70255

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  • Thank you received: 133
I sometimes encounter problems where the mount travels the opposite direction of where it's been asked to go. For this reason, I home the mount every single time I boot it up. I've also seen where I might start it up, home it, and let it sit for a few hours, then issue a GOTO command and it doesn't know where it's pointing. So I have to home again, then reissue the command. I have no idea what causes this erratic behavior. I've also seen on occasion that if the mount moves from west to east, and you send it back west again, sometimes it thinks the shortest route is to continue east until it gets back to the point you sent it to. This makes the cables wrap around the mount. I also don't know why it does this.

But typically homing before using the mount in anyway keeps all these scenarios from happening.
-Andrew
––––––––––
Mac Observatory - All about using the Mac for Astrophotography: www.macobservatory.com
Astrobin: www.astrobin.com/users/Lead_Weight/
4 weeks 14 hours ago #70272

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Yes, I think it's a good idea to have the HC handy in case the mount gets confused.
I intend to use this mount mostly for travelling to dark sites - I will need it anyway to update the location.
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
3 weeks 5 days ago #70350

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  • Posts: 527
  • Thank you received: 53
I found that leaving the mound in the "standard" parking position - scope pointing at NCP is pretty safe in terms of the backdrive.
So, in the end of a session I don't bother anymore driving it to RST's default home position (horizontal facing West).
Just reporting.

Waiting for the good weather to return and the Moon to go away to play more.
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
The following user(s) said Thank You: sywong2000
Last edit: 3 weeks 1 day ago by maxthebuilder.
3 weeks 1 day ago #70565

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